MDS™ Master Station Technical Manual Modular Communications Platform MDS 05-6399A01, Rev. G AUGUST 2019 Firmware Version 5.0.7 and higher.
Quick-Start instructions for this product are contained in publication 05-6398A01. Visit our website for downloadable copies of all documentation at www.gemds.com. IMPORTANT This manual describes the details, installation, configuration and operation of the MDS™ Master Station. It does not cover the description or configuration of features and settings common to the MDS Orbit family of products.
TABLE OF CONTENTS 1.0 INTRODUCTION .................................................................................................. 9 1.1 Organization of Manual ............................................................................................ 9 Related Publications ........................................................................................... 10 2.0 KEY PRODUCT FEATURES ............................................................................. 11 2.1 2.2 2.3 2.
CLI Quick Reference Table ................................................................................ 30 5.4 Interface Naming ................................................................................................... 32 5.5 Configuration via the Device Manager ................................................................... 32 General Configuration ........................................................................................ 33 5.6 Interface Configuration ........................
Technical Specifications ................................................................................... 108 6.5 LN Radio Modules ............................................................................................... 110 LN Master Radio Module LED Indicators ......................................................... 110 Technical Specifications ................................................................................... 111 6.6 Alarm and Alarm/Relay Modules ...............................
Copyright Notice This Technical Manual and all software described herein are protected by copyright: 2015 GE MDS. All rights reserved. GE MDS reserves its right to correct any errors and omissions in this publication. Safety words and definitions The following symbols used in this document indicate the following conditions: Indicates a hazardous situation which, if not avoided, will result in death or serious injury.
The RF safety distance is calculated based on each product type’s highest output power configuration with no duplexer, redundant switching, or cable losses. Table 1-1 Antenna Gain vs. Minimum RF Safety Distance Antenna Gain Radio Module Equipped 0–5 dBi 5–10 dBi 10–16.5 dBi SDM4 – FCC 1.09 meters 1.95 meters 4.11 meters SDM4 – IC 1.43 meters 2.54 meters 5.37 meters SDM9 – FCC 0.99 meters 1.76 meters 3.73 meters SDM9 – IC 1.29 meters 2.30 meters 4.87 meters LN4 1.43 meters 2.
6. The AC socket outlet shall be installed near the equipment and shall be easily accessible. 7. The power supply cord must be disconnected from the appliance inlet before removing any power supply from the chassis. 8. CAUTION: THIS UNIT HAS MORE THAN ONE POWER SUPPLY CORD. DISCONNECT THE TWO POWER SUPPLY CORDS BEFORE SERVICING TO AVOID ELECTRIC SHOCK 9. The equipment chassis shall be permanently grounded though a size six screw and a star toothed washer. 10.
Canada, IC ERP Limits IC SRSP-501, 6.3.2. Limits the ERP to 125W for fixed point-to-point operation. For IC use, the antenna gain and Transmit power must be set to meet the ERP limit of 125W. This can be accomplished by using the appropriate at antenna gain in combination with the RF power settings Environmental Information The equipment that you purchased has required the extraction and use of natural resources for its production.
grounded bare metal object to dissipate body charge, prior to connecting and disconnecting cables on the front or rear panels. Open Source License Declaration Orbit MCR products include Open Source Software. Usage is governed by the corresponding licenses which are listed on the GE MDS Industrial Wireless website, under Orbit MCR Software/Firmware Downloads, Support Items and download license-declaration.txt.
1.0 INTRODUCTION The MDS™ Master Station is an advanced, flexible platform designed for the demanding requirements of today’s industrial wireless networks. It represents the latest development in a line of MDS products that set the standards for wireless performance today.
Related Publications In addition to this manual, a companion Setup Guide is available for the MDS™ Master Station, Part No. 05-6398A01. The Setup Guide is focused on the essential steps for installation and startup of the unit, and is designed to be used with this Technical Manual. The MDS™ Master Station Setup Guide, Part No. 05-6398A01 contains basic installation and startup instructions for the product. All GE MDS user manuals and updates are available online at www.gemds.com.
2.0 KEY PRODUCT FEATURES As a licensed, long range IP/Ethernet and serial communications device, the Master Station exceeds industry standards for reliability and performance in wireless networks. Listed below are several key features and benefits of the product, and these are available with the appropriate modules installed and configured in the chassis.
When equipped with LN radio cards, the Master Station works with Orbit MCR LN (left) and Orbit ECR LN (right. Figure 2-2 MPRS Compatible Remotes When equipped with SD radio cards, the Master Station works with legacy MDS x710 (left), and newer MDS SD Transceivers. 12 MDS™ Master Station MDS 05-6399A01, Rev.
2.1 Accessories and Spare Items The following table lists common accessories and spare items for use with the Master Station. GE MDS also offers an Accessories Selection Guide listing an array of additional items available for use with the product. Contact your factory representative or visit www.gemds.com to obtain a copy of the guide. Table 2-1.
Table 2-1. Accessories and Spares Item Description Part Number SDM4 Module SDM4 B-band full duplex radio: 400-450MHz FCC Part 22, 90, IC, CE SDM4 C-band full duplex radio: 450-512MHz FCC Part 90, IC, CE 03-6846A01-4B 03-6846A01-4C LN4 Module LN400 E-band QAM radio: 406.
FCC Emission Designators: How to Find Them An FCC emission designator is a seven-character string that represents the bandwidth, modulation, and other characteristics of a transmitted radio signal. This information is required when applying for an FCC license. The designator assigned to your equipment depends on the particular sub-model of the product line you are licensing.
Table 2-2. Module Descriptions Module Name ID Function Power Supply 1 6843: (+/- 12-36 VDC) Power Supply 2 6844: (+/- 36-75 VDC) Provides operating power based on a variety of AC and DC input options. Up to two power supply modules may be installed in the chassis (AC or DC; any combination. In a redundant configuration, both power supplies work in tandem and are independent of which radio is currently active.
3.0 INSTALLATION PLANNING This section covers pre-installation factors that should be considered when installing the Master Station. Careful planning will help achieve optimal performance from the radio. After reviewing this section, refer to the step-by-step installation procedures beginning on Page 23.
3.1 Applications The Master Station is designed for point-to-multipoint data transmission in utility SCADA communications, transactional systems, and telecommunications systems. The wireless network provides communications between a central host computer and remote terminal units (RTUs) or other data collection devices. In such an arrangement, the operation of the radio system is transparent to the computer equipment.
radio may be a Master, Repeater, Polling Remote, or Remote. This locally connected radio must be configured as the DLINK “root” radio to be discovered with DLINK. Downstream radios should be configured as “node”. PulseNET uses passive polling to discover the “root” radio and all of the “node” radios downstream. Passive polling allows monitoring without interrupting payload data transmission. In order for PulseNET to discover SD Master Stations in the network, DLINK must be enabled and properly configured.
Table 3-1. Signal Loss in Coaxial Cables (at 900 MHz) 10 Feet (3 Meters) 50 Feet (15 Meters) 100 Feet (30.5 Meters) 200 Feet (61 Meters) RG-8A/U 0.85 dB 4.27 dB 8.54 dB 17.08 dB 1/2 inch HELIAX 0.23 dB 1.15 dB 2.29 dB 4.58 dB 7/8 inch HELIAX 0.13 dB 0.64 dB 1.28 dB 2.56 dB 1-1/4 inch HELIAX 0.10 dB 0.48 dB 0.95 dB 1.90 dB 1-5/8 inch HELIAX 0.08 dB 0.40 dB 0.80 dB 1.60 dB Cable Type Table 3-2. Signal Loss in Coaxial Cables (at 400 MHz) RG-8A/U 0.51 dB 50 Feet (15 Meters) 2.
3.6 Data Interface Connections Ethernet Data Interface (RJ-45) The Ethernet interface supports both radio management and payload data transport functions. For radio management, connecting via a web browser provides enhanced functionality and easeof-use over serial/USB methods. Web-based management is the preferred and primary means of accessing the transceiver through the built-in Device Manager.
Table 3-4. RF-45 to DB-9F Pin Out Signal RJ-45 DB-9F Standard RS-232 DSR 1 6 DSR DCD 2 1 DCD DTR 3 4 DTR Ground 4 5 Ground RXD 5 2 RXD TXD 6 3 TXD CTS 7 8 CTS RTS 8 7 RTS No connection N.C. 9 RI Mini USB The Mini USB port can be used to management the radio through a scriptable command line interface (CLI) using the proper USB drivers available at www.gemds.com. Connect to the management PC using the included Mini USB Cable.
4.0 INSTALLATION PROCEDURES This section presents the steps necessary for installing the radio and connecting it to associated equipment. After completing these steps, the radio is ready for in-service operation. 4.1 Unpacking and Inspection Check the contents against the packing list secured to the outside of the shipping box. Accessories and spare parts kits, if any, are wrapped separately. Inspect all items for signs of damage.
Figure 4-1. Internal Duplexer, Triple N connectors Figure 4-2. Internal Duplexer (or internal T/R switch), Single N connector Figure 4-3 External duplexer or dual antennas, Double C connectors (TX and RX ports pass directly through) 4. Install the Data Interface Cabling. Interface connections are made to the front of the Platform Manager module. Typical connections for most sites include: 24 MDS™ Master Station MDS 05-6399A01, Rev.
- Serial Data—Attach data equipment to the front panel COM1 and/or COM2 ports. The unit is hardwired as a DCE device (DB9-F to RJ-45 connector, GE MDS part no. 73-2434A25). - Ethernet LAN—Attach data equipment to the ETH1 and/or ETH2 port. The auto-sensing MDIX feature allows either a straight-through or crossover cable to be used. Where applicable in the steps that follow, secure all cable connections with the locking screws provided. 5.
Figure 4-4 DC Power Connector 6. Connect a PC for Configuration (LAN or USB port). This prepares the Master Station for programming of desired operating parameters. Configuration is further described in Section 5.0 Device Management If serial-based cabling is used for configuration, an adapter may be required at the PC, as many PCs do not offer a serial port. In such cases, a USB-to-Serial adapter (with appropriate driver software) may be used. These adapters are available from a number of manufacturers. 7.
W iFi GPS PW R/AL ARM ACT IVE TX RX TX RX MIN PW R/AL ARM ACT IVE ALAR M B USB MA J PW R ALAR M AC T A B B RX RF RX RF T X/RX 683 4 T X/RX 6846 Figure 4-5 LED Indicators 6846 Alarm/Audio OUT COM2 AU TO A ETH1 ETH2 COM1 A 684 7 Normal Indications When power is first applied, the following events occur in a normally working unit: • All front panel indicators light briefly • The ACTIVE LED for the selected transceiver board lights.
5.0 DEVICE MANAGEMENT This section describes the steps for connecting a PC, logging in, and setting unit parameters. The focus here is on the local serial/USB console interface, but other methods of connection are available and offer similar capabilities. The key differences are with initial access and appearance of data. The MDS™ Master Station offers several interfaces to allow device configuration and monitoring of status and performance.
A one-time recovery password is different from the one used to log into the unit on a routine basis. It is only for use when the primary password is lost or forgotten. When a one-time password is used to log in, that password is automatically revoked from the list of passwords created. (You may create up to five one-time passwords at one time, and more can be created if some get used).
The current list of passwords may be viewed by issuing the command show system recovery oneThe following is an example output from that command. On the unit shown, only two passwords have been stored. Password 1 or 2 can be deleted from this list. time-passwords. IDENTIFIER FUNCTION STATUS DATE CREATED ---------------------------------------------------------------------1 login usable 2 login usable DATE REVOKED USER 2012-06-19T00:27:24+00:00 2012-06-19T00:27:25+00:00 5.
Table 5-1. CLI Quick Reference Table If you wish to...
Table 5-1. CLI Quick Reference Table If you wish to... Reboot device to firmware inactive image Enter this CLI command: > request system power restart inactive 5.
services web http(s) enabled true/false General Configuration For initial configuration of the Master Station, perform the following steps: 1. Connect the unit to a PC via an Ethernet connection. 2. Configure your PC network settings to an IP address on the same subnet as the unit. The default subnet mask is 255.255.255.0. For IP addressing the Master Station uses a routing prefix expressed in CIDR notation instead of specifying a subnet mask.
• Keying mode • Repeater Configuration (if necessary) • Serial data interface configuration • Legacy DLINK settings Similarly WizardsÆ Interface Setup will allow the user to configure the LN radio. 5.6 Interface Configuration Understanding A serial cable (RJ45 cable with proper ETH to DB9 converter) may be used to connect to a COM port on the unit to access the CLI. The default serial console settings are 115200 bps with 8N1 format.
Clicking on the row of the port you wish to edit will present you with the following options: • Line Mode - Selection of the operation line mode of the serial port. Choices are: - RS232 (DEFAULT) - RS485 - 2 Wire - RS485 - 4 Wire • Baud Rate - The serial port baud rate in bps.
- 7N2 - 7 char bits, no parity, 2 stop bits 7E2 - 7 char bits, even parity, 2 stop bits 7O2 - 7 char bits, odd parity, 2 stop bits 8N1 - 8 char bits, no parity, 1 stop bit (DEFAULT) 8E1 - 8 char bits, even parity, 1 stop bit 8O1 - 8 char bits, odd parity, 1 stop bit 8N2 - 8 char bits, no parity, 2 stop bits 8E2 - 8 char bits, even parity, 2 stop bits 8O2 - 8 char bits, odd parity, 2 stop bits • Hw Flow Control - Hardware flow control enable/disable (DEFAULT) using RTS/CTS lines • Vmin - Receive Buffer Si
- The unit shall support flow control (Throttling) on the RTS pin. The device is expected to be wired via null modem to an external DCE device. The CTS line of the external DCE device drives the RTS line of the unit. Statistics for the Serial ports and IP Payload 1, 2, 3 are located under the active SD radio interface (Interfaces Æ sd-x/0/0 Æ Status Æ Statistics). See section 5.9, SDMS Interfaces, for more details. 5.
• Eth Phy Rate - Choose the Ethernet speed support setting (DEFAULT ALL) - Eth 10Mb Half Eth 10Mb Full Eth 100Mb Half Eth 100Mb Full • Enabled - Enable or disable the use of an IP address • Forwarding - Indicates if IPv4 packet forwarding is enabled or disabled on this interface. True (DEFAULT) / False • Mtu - The size, in octets, of the largest IPv4 packet that the interface will send and receive. Range 68-65535 - 1500 (DEFAULT).
• Filter Input - Use for selecting and applying a firewall filter (from available filters) to incoming traffic on this interface. • Filter Output - Use for selecting and applying a firewall filter (from available filters) to outgoing traffic on this interface.
• Vlan Mode - Virtual LAN Setting. - None (DEFAULT) - Access - Use this if this interface is intended to be a member of only a single VLAN. - Trunk - Use this if this interface is intended to be a member of multiple VLANs. For information about VRRP setup, refer to “VRRP – Virtual RouterRedundancy Protocol” in the MDS Orbit MCR Technical Manual (05-6632A01). 5.8 Bridging Understanding The unit supports transparent bridging of LAN, and in firmware versions of 3.0.0 and higher, WiFi and SD networks.
Through this process, the bridge builds a forwarding table (the learning process). When a frame is received on one of the bridge's interfaces, the bridge looks up the frame's destination address in its forwarding table. If the table contains an association between the destination address and any of the bridge's ports aside from the one on which the frame was received, the frame is forwarded out the indicated port. If no association is found, the frame is flooded to all ports except the inbound port.
Figure 5-2. Virtual Radio Channel (VRC) Concept Understanding the use of Media Access Control (MAC) An important feature of the transceiver is Media Access Control (MAC). The radio’s MAC is specifically designed for use with narrow bandwidth, half duplex radio networks such as those commonly used in licensed telemetry systems.
Status Tab The Status tab on the sdms interface page gives an overview of the current state of the sdms interface. The information displayed is described below: General This section shows a general overview of the SDMS interface. The current status of the relay switch, as well as which SD NIC is currently active is displayed here. The NIC Status table is composed of the following columns: • Chassis Slot – The slot in which the SD NIC was discovered.
• Members – The Master Station (sdms) interface is a logical interface that is composed of one or more physical SD interface cards (sd-nic). The ‘members’ configuration item is the mapping between the logical sdms interface, and the physical sd-nic cards. A single sd-nic resides in each SDM Radio Module. This is factory configured to contain SDM Radio Modules in slot 1 and slot 2 of the Master Station.
- x710 – When using the Master Station in a legacy x710 network. - Transparent – With and without AES Encryption. (Transparent w/AES Encryption requires an all SD radio network.) • Modem Type – This setting determines the over-the-air data speed and bandwidth of the radio’s transmitted signal. All radios in the network must use the same modem setting to communicate with each other. The default setting is Modem 9600, but it may be set to any of the selections shown in Table 5-2. Modem Selection vs.
Figure 5-3. System ID Example — Valid Arrangement Figure 5-4. System ID Example — Invalid Arrangement • FCC Part 90 Repeater Mode – Repeater mode must be set to one of the following values: - None – This is the default value, and is used when the Master Station being configured is not to be used as a repeater in the network.
• Allowed Ethernet Packet Types – When operating in packet-with-mac mode, and sending Ethernet traffic, this option will restrict the types of Ethernet frames that will be sent over the air. Options are: - None – This will prevent any Ethernet frames from being transmitted over the air. - All – All Ethernet frames will be sent over the air, regardless of type. - Unicast Only – Only unicast packets will be sent over the air.
Table 5-2. Modem Selection vs. Speed, Bandwidth & Sensitivity 1. 2. 3. 4. Modem Type Selection Over-the-air Speed (bps) B/W (kHz) Approximate Sensitivity (dBm) 96001 9600 12.5 -112 9600N 9600 6.25 -98 19200N 19200 12.5 -100 19200 19200 25 -105 38400N 38400 25 -99 650003 65000 50 See note 3 48001 4800 12.5 -112 X 9600M1 9600 12.5 -106 X 19200E 19200 12.
- Serial Port — This setting determines which serial port to use COM1 or COM2. This must be different than the serial payload port. • TCP Mode Settings: - Security Mode – When set to a value other than none, connections will be encrypted using a pre-shared key via TLS. The version specified by this parameter will be only version allowed by the server. - TCP Port – The TCP port that the Dlink service will listen on. - IPv4 Addr – Optionally configure the service to only attach to the specified IPv4 Address.
• MAC Retries – If a message is not acknowledged after transmission it will be resent. This value controls how many times the radio attempts to resend the message before discarding it. • Time to Live – When a message arrives from the payload interface(s) it is time-stamped and queued for radio transmission. If the radio cannot transmit the message before the Time-to-Live (TTL) value (in seconds), the message is discarded. This helps prevent stale or old data from being sent over the air.
not send a response until it also has data to send. This is the preferred mode when no other network monitoring systems are being used. - Silent – In Silent mode, the unit transparently sniffs DLINK messages that are already on the network rather than send out its own. This is useful in a network where DLINK diagnostics are already in use by other devices or network monitoring systems.
TCP Server specific configuration options include: - Multihost Enabled – Multihost is a legacy feature that has been superseded by the Packet w/MAC feature. It should only be used in legacy systems or in special use cases. Enables or disables multihost. Default = FALSE - Multihost Timeout – This is the time, in milliseconds, that a multihost server waits for a response from a poll before moving on to the next queued polling message.
TCP Client: The TCP client mode allows the Master Station to connect to a TCP server when there is traffic to send. This mode of operation is not often used in Master Station configurations, but may be useful in certain applications. TCP Client specific configuration options include: - Server IP Address – The IP address of the server the Master Station is to connect to. - Remote IP Port – The TCP port that the server is listening on.
TCP Server/Client specific configuration options include: - Local IP Port – The TCP port number that the server will listen for connections on. - Server IP Address – The IP address of the server the Master Station is to connect to. - Remote IP Port – The TCP port that the server is listening on. - IPv4 Bind IP – If the Master Station is configured with multiple IP interfaces; you can specify that the IP Payload service only will listen for connections on one of the IP addresses of the system.
UDP specific configuration options include: - Local IP Port – The UDP port number that the server will listen for connections on. - Server IP Address – The IP address of the server the Master Station is to connect to. - Remote IP Port – The UDP port that the server is listening on. - IPv4 Bind IP – If the Master Station is configured with multiple IP interfaces; you can specify that the IP Payload service only will listen for connections on one of the IP addresses of the system.
Firewall Filter The firewall filtering rules to apply to this interface when it is not a member of a bridge or VLAN interface. For full information on applying firewall filters to interfaces, see the MDS Orbit MCR Technical Manual (05-6632A01). VLAN The VLAN configuration section is used to configure the SDMS interface to be a member of a VLAN. For full information on configuring VLANs and adding interfaces to existing VLANs, see the MDS Orbit MCR Technical Manual (05-6632A01).
NAT The NAT configuration section is used to configure network address translation (NAT) on the SDMS interface. For full information on configuring NAT on interfaces, see the MDS Orbit MCR Technical Manual (05-6632A01). Advanced Configuration Tab Advanced Configuration - Soft-Carrier Dekey – Specifies how long (in ms) to wait after the removal of the keying signal before actually dropping the transmitter’s carrier. The default setting is 0, but it may MDS 05-6399A01, Rev.
be set to any value up to 255 ms. In most cases, no change is required from the default setting. A possible exception is when the transceiver is inter-working with certain earlygeneration MDS radio equipment. - Push to Talk Signal – Specifies the sensing polarity of the PTT line. This must be configured to one of the following values: - Off – PTT line is not used. - Hi – The PTT line is active-high. - Lo – The PTT line is active-low.
even when using B-Modems. Depending on site-specific requirements, this value may need to be changed to ‘bypassed’ in order to work with legacy products. It is recommended to leave this value set to ‘auto’ unless there is an explicit need to change it. - Rx Mute – The number of milliseconds to mute the receiver after transmitting data. Receive muting might be required when you configure the radio as a full-duplex polling remote communicating through a repeater.
- Bypass Rxmute – This setting should be enabled only if instructed to by GE MDS technical support for specific applications. Audio Audio settings are only available for configuration when the radio is configured to operate in x710 compatibility mode. - Audio Enabled – If enabled, the radio’s transmit functionality will switch to analog whenever PTT is asserted. - Rx Level – Receive audio output level to modem (dBm). Received signal at the peak deviation will be scaled to the specified value.
Enabled Alarms This configuration section controls which of the various alarms that can be generated on the SD NIC will be propagated up to the platform manager for system logging. All alarms default to being enabled, and should remain enabled unless there is an explicit need to disable one. RTU Simulator The unit’s built-in RTU simulator generates random data similar to what would be supplied by an external RTU connected to the radio.
Link Test The primary use of the Link Test is to verify that a specific radio's settings are consistent with the initiator including: Assigned frequency, unit number setting, encryption (if enabled), etc. Also collected at the same time is an indication of link quality. All radios are always ready to respond to a Link Test message. Only the initiating radio requires configuration when using the Link Test screen and it is only available when operating in Packet w/MAC mode.
Remote Management Command The Master Station has the ability to broadcast management commands to remote SD radios in the network. These commands are sent to all connected remote radios, and hence should only be used for making network-wide changes. The following action can be specified: - Reboot – All remote radios will reboot to the currently active firmware image.
RF Key Test Using the RF Key Test action, the active radio can be manually keyed (transmitter enabled) or de-keyed (transmitter disabled). This may be useful when diagnosing signal-strength on a remote receiver. Spectrum Analyzer A unique feature of the transceiver is the ability to view the RF spectrum above and below the operating frequency using its built-in Spectrum Graph. Often, this can assist in diagnosing the cause of interference, or to view other signals near your operating frequency.
Remote SD Reprogramming OTA Reprogramming Overview This feature is for reprogramming SD remote radios only. This will not reprogram other Master Stations on the network. The DLink “Root” is the central location from which polling originates. Other locations in the network should be designated as “Nodes” which are the receiving stations. Over-the-air firmware upgrades should always be initiated from the Root. This ensures that all radios in the network will be properly updated.
gramming radios over the air, but it comes at the cost of interruptions in the primary use of the radio network. For best results, data polling should be stopped during Intrusive Reprogramming. See Table 5-4 for reprogramming times. - Block Size – Sets the overall block size (in bytes) of each data packet. Default setting is 512. - Auto-Reboot – When enabled, the remote radios will automatically reboot after a firmware image upgrade.
- File Source – There are many file transfer protocols supported, select Local File to upload directly from your browser, or HTTP / FTP / SFTP / TFTP to have the MDS™ Master Station retrieve the file from a remote server. - Local File (Browser Upload) – Click the “Select File” to choose a file, and press “Begin Reprogramming” - URL (HTTP only) – Enter a valid URL (e.g http://192.168.1.1/file.mpk) pointing to the firmware.
Reprogramming Status Once reprogramming has begun, the current reprogramming status will appear beneath the “Cancel Reprogramming” button. 68 MDS™ Master Station MDS 05-6399A01, Rev.
Monitoring Statistics Interfaces Æ sdms Æ Status Æ Statistics - Discontinuity Time – The time on the most recent occasion at which any one or more of this interface’s counters suffered a discontinuity or interruption of service. - In Octets – The total number of octets received on the interface, including framing characters. - In Unicast Pkts – The number of packets, delivered by this sub-layer to a higher (sub)layer, which were not addressed to a multicast or broadcast address at this sub-layer.
Performance Interfaces Æ sdms Æ Status Æ Performance - Measured RF Power – Read-only indication of the measured RF output power (in dBm). - Signal to Noise (SNR) – Read-only indication of the signal-to-noise ratio of the received signal. - RSSI – Read-only indication of the measured received signal strength (in dBm). IPv4 / IPv6 70 MDS™ Master Station MDS 05-6399A01, Rev.
5.10 SD-x/0/0 Interfaces Configuration for each SD Radio Modules is done via the SDMS interface. Each individual interface provides statistics for serial, IP payload and MAC that could be helpful in a debugging situation. General Interfaces Æ sd-x/0/0 Æ Status / General This screen is read-only and displays the status of the SD NIC interface. Statistics Interfaces Æ sd-x/0/0 Æ Status / Statistics Sd Statistics This section will contain statistics on the MAC, COM Ports, and IP Payload (1-3).
- Com 1 Tx Bytes – The total number of transmitted bytes on the COM1 port. - Com 1 Rx Bytes – The total number of received bytes on the COM1 port. - Com 2 Tx Bytes – The total number of transmitted bytes on the COM2 port. - Com 2 Rx Bytes – The total number of received bytes on the COM2 port. - Pmux Tx Packets – The total number of data packets transmitted. - Pmux Rx Packets – The total number of data packets received. - Com 1 Tx Packets – The total number of transmitted packets on the COM1 port.
- Tx Radio Packets – Total number of transmitted packets through the radio. - Rx Radio Failed Bytes – Total number of received bytes failed through the radio. - Rx Radio Failed Packets – Total number of received packets failed through the radio. - Tx Eth Failed Bytes – Total number of transmitted bytes failed on the Ethernet. - Tx Eth Failed Packets – Total number of transmitted packets failed on the Ethernet. - TCP Keepalive Timeouts – Total number of TCP Keepalive Timeouts by the radio.
- MAC Acknowledgements – Total number of MAC frames acknowledged by the access point. (when operating as a remote) - MAC TTL Expirations – Total number of frames dropped due to expired time-to-live counters. 5.11 LNMS interface Understanding Licensed Narrowband Modules are available in various global frequencies. The term “LN” is used to denote all licensed narrowband modules within the Orbit family. Specific identification, such as “LN400,” is used when necessary to reference band-specific hardware.
The specifications for the LN700 NIC module: x x x x Frequency Range(s): 757-788 MHz FCC Part 90 (private land mobile radio services) FCC ID: E5MDS-LN700 ICID: n/a The specifications for the LN900 NIC module: x x x x Frequency Range: 896-960 MHz FCC Part 90 (private land mobile radio services) & Part 101 FCC ID: E5MDS-LN900 ICID: 101D-LN900 The general specifications for all LN NIC modules are: x x x x x x Peak Power Output: 20 dBm to 40 dBm peak power in 1.
x x x x ARP Cache – Feature that limits over-the-air ARP traffic Data and Header Compression – facilities to use LZO data compression for payload and robust header compression to reduce packet overhead FEC – facility to selectively enable Forward Error Correction trading off speed and robustness Allow Retransmit – facility to enable peer-to-peer traffic In general, it is recommended that users start with the simplest configuration and then make parameter changes as necessary to meet specific needs.
Figure 5-5. Virtual Radio Channel (VRC) Concept Important Notes and Information Regarding EVM EVM (error vector magnitude) is dependent on the modulation format and should be used as a relative measurement of the link quality. A low EVM value indicates a better link quality than a high value. Algorithmically, using QAM modulation, the transceiver calculates the value by measuring the sample points of each "bit" and comparing it with the expected constellation based on the modem type.
the directed messages, when otherwise the whole network would have had to be run at the lower data rate. Note that broadcast or multicast data must always be transmitted at the lowest rate. We recommend keeping adaptive modulation set for most installations. Security Setting the security mode to EAP or PSK will enable device authentication. When enabled, the remotes will authenticate with the AP (PSK) or a backend RADIUS server (EAP) before they are allowed to pass data on the network.
x x Members – The ln-nic interfaces that are used for this configuration Device Mode - Sets the role the radio will assume in the network. - Remote (DEFAULT) AP x Network Name - The name of the network. Used to control what networks the radio connects to. Valid values: 1 to 31 letters (DEFAULT is mds_ln). The network name string is used to identify the logical network that the device should join. If the network name does not match, the device will log an event to identify network name collisions.
x FEC -- Forward Error Correction is useful in controlling errors in weak connections. FEC encodes data in a redundant fashion to allow data correction in a noisy or weak connection without the additional overhead of retransmission. - Disabled (DEFAULT). No Forward Error Correction will be used. This option provides the highest throughput and standard sensitivity, and is suitable for strong connections. Low Gain – Provides better sensitivity, while still offering good throughput.
x Encryption - The type of over the air encryption to perform - x x x x none - No data privacy (DEFAULT) aes128-ccm - Protect data with 128-bit AES encryption using CCM mode aes256-ccm - Protect data with 256-bit AES encryption using CCM mode Passphrase - The passphrase used in PSK mode, 8 to 64 letters. (DEFAULT=blank) Certificate ID, Key ID, CA Certificate ID (Remote EAP mode only) – Reference to the remotes certificate material loaded through the Certificate Management side menu.
Figure 5-11 Licensed Narrowband (LN) Remote Advanced Settings The Advanced Setting menu appears slightly different on APs than on Remotes. x x x x x x x x x Data Retries - Number of times to retry unicast data before declaring failure. Valid values: 0—15, DEFAULT = 7. Packet TTL (Time-to-Live) – Length of time, in milliseconds, of inactivity of all over-the-air traffic before registering a disconnection. The radio will then attempt to reconnect to the network.
Figure 5-12. Licensed Narrowband (LN) AP Status x x x x x Type - The type of the interface. Licensed Narrowband radios appear as “ln.” Admin Status - The desired state of the interface. Oper Status - The current operational state of the interface. If Index - The index value for this interface in the Orbit’s interface table. Valid values are: 1-2147483647 Phys Address- The interface's address at its protocol sub-layer. For a LN module, this object normally contains a MAC address.
x x x x Out Octets - The total number of octets transmitted out of the interface, including framing characters. Out Unicast Pkts - The total number of packets that higher-level protocols requested be transmitted, and which were not addressed to a multicast or broadcast address at this sub-layer, including those that were discarded or not sent. Out Discards - The number of outbound packets which were chosen to be discarded even though no errors had been detected to prevent their being transmitted.
x x x x x x MAC Tx Success - Successful transmissions. MAC Tx Queue Full - Failed transmissions, MAC queue full. MAC Tx Error - Packets dropped for other reasons. MAC Tx Retry - Re-transmission count due to previously unsuccessful transmission. MAC Rx Success - Valid packet received. MAC Rx Error – Received packets dropped due to error. x Last RSSI – The RSSI measured at the time of the last received packet.
Figure 5-5. Virtual Radio Channel (VRC) Concept Important Notes and Information Regarding EVM x x Last Modulation – The modulation measured at the time of the last received packet. Rate – The calculated over the air rate from Table 5-5. Hardware Info Figure 5-15 Licensed Narrowband (LN) Hardware Info Information about the Licensed Narrowband NIC’s hardware is also displayed on the LN Radio’s Statistics menu. This information may be helpful when calling technical support.
Figure 5-16. Licensed Narrowband (LN) AP Connection Status Remote’s AP Info (Remote Only): Figure 5-17. Licensed Narrowband (LN) Remote’s AP Information x x x x x x x x x AP Address - MAC address of access point this device is linked to. IP Address - IP address of access point this device is linked to. Connected Time - Time elapsed in seconds since link established. After 4294967295 seconds, the value displayed rolls over to 0. RSSI - The RSSI measured at the time of the last received packet.
mode. To create the “pipes” that direct data to the desired ports, a route must be established using the payload serial settings on the general configuration menu for serial data. The default setting is to listen to all channels. The Talk on parameter is used to specify the VRC used for sending the data stream over the air, while the Listen to parameter specifies the VRC(s) for incoming data. Any combination of the three VRC numbers may be entered in the selection fields. Figure 5-2.
Test Mode Interfaces / lnms Æ Actions Test Mode provides a way to place the transmitter on the air to check the measured RF power output, measure reflected power from an antenna system, or to provide a signal at a receiving station so that RSSI can be checked. While in Test Mode, a radio will not operate normally and does not communicate with the narrowband network. To enter or exit Test Mode, select the desired test state from the State drop-down box and click Perform Action.
CLI Configuration Examples AP Mode On the next page, the example will display how to configure the LN module as an access point with the network name of ‘MyNetwork’ and default settings. For this example we assume a transmit frequency of 451.4 MHz and a receive frequency of 456.4 MHz. Your own LN frequencies must be set according to your user license. % set interfaces interface lnms ln-config device-mode access-point network-name MyNetwork tx-frequency 451.4 rx-frequency 456.
header-compression true; power 40; tx-frequency 451.4; rx-frequency 456.4; channel 12.5KHz-9.
qam16-threshold qam64-threshold -85; -70; } Remote Mode The following will configure the LN module as a Remote with the network name of 'MyNetwork' and default settings. For this example we assume the inverse of the AP frequency plan – a transmit frequency of 456.4 MHz and a receive frequency of 451.4 MHz. Your own LN frequencies must be set according to your user license. % set interfaces interface lnms ln-config device-mode remote network-name MyNetwork txfrequency 456.4 rx-frequency 451.
power tx-frequency rx-frequency 40; 456.4; 451.4; channel 12.5KHz-9.6ksps; modulation automatic; fec false; security { security-mode psk; encryption aes256-ccm; passphrase $4$BfPtSlDWFNhtqe4ZcJTWQQ==; } advanced-config { data-retries 3; nic-id 0; inactivity-timeout 600; remote-age-time 600; arp-cache false; qam16-threshold -85; qam64-threshold -70; } The following configures the LN module to use data compression, EAP authentication and aes128-ccm encryption. The EAP mode currently supports only EAP-TLS.
nic-id 0; inactivity-timeout 600; remote-age-time 600; arp-cache false; qam16-threshold -85; qam64-threshold -70; } Monitoring Ensure the CLI is in operational mode. Access Point Mode The following shows status with two stations connected. > show interfaces-state interface lnms ln-status ln-status init-status complete ln-status current-device-mode access-point ln-status alarms "" ln-status firmware-revision 0.2.
device-stats tx-drop 0 device-stats rx-drop 0 nic-id 1 Remote Mode The following shows status when connected to a configured Access Point. > show interfaces-state interface lnms ln-status ln-status link-status associated ln-status init-status complete ln-status current-device-mode remote ln-status alarms "" ln-status firmware-revision 0.2.
ln-status test test-state stop Test Mode Ensure the CLI is in operational mode.
5.13 Redundancy You may manage the behavior of a redundant Master Station. Navigate to System->Redundancy. The Status tab shows the current relay switch status. Figure 5-19 Redundancy Status menu x Relay Switch Position (Forced A/Forced B/Automatic) – Shows the current state of the relay card’s manual override switch. Figure 5-20 Standby Equipped and Scheduled Failover The Basic Config tab contains the Standby Equipped and Scheduled Failover menus.
o o Enabled (Enabled/Disabled, default Disabled) Period (1 – 43200 minutes, default 1440 (24 hours)) – This is the interval at which the unit should perform failover. Perform Failover The Actions tab allows you to perform an immediate failover. If the Master Station is equipped with redundant radios, the active radio can be manually toggled by selecting the “Perform action” button. The manual toggle-switch on the alarm/relay board must be in the ‘Automatic’ position for this operation to succeed.
6.0 MASTER STATION MODULES The available modules are listed below and described in the following sections. To aid identification, most modules have their 4-digit base part number printed on the faceplate. These are the 4 numeric digits following 03- prefix. Table 6-1. Available Modules Identifier Item Description 6755 100-220V AC Power Supply Module 100-220 VAC, 50/60 Hz. 120W Max AC Power Supply Module. Spare power supply can be used in either of two power supply slots of the MDS™ Master Station.
6.1 AC Power Supply Module Figure 6-1 AC Power Supply Module (Part No. 03-6755A02: 110/220 VAC) Table 6-2. 6755 AC Power Supply Module Specifications Supply Type SMPS AC to DC Input Voltage Range 100-264 VAC Output 24 VDC, 4.0A Line Frequency 50-60Hz Power Consumption 120W, Maximum Protection Integrated thermal protection, short circuit protection, internal non-serviceable fuse Ambient Temperature range Full capacity from -30°C to +60°C. CSA certified operating range -30°C to +39°C.
6.2 DC Power Supply Module Figure 6-2. DC Power Supply Module Including: 03-6843A01: +/- 12-36 VDC 03-6844A01: +/- 36-75 VDC 03-6845A01: +/- 75-140 VDC Table 6-3. DC Power Supply Module (6843, 6844, 6845) Specifications: Supply Type SMPS DC to DC Input Voltage Range +/-36-75 VDC, input is isolated from ground +/-12-36 VDC, input is isolated from ground +/-75-140 VDC, input is isolated from ground Output 24 VDC, 4.
6.3 Platform Manager Module Figure 6-3 Platform Manager Module The Platform Manager module is an orbit based management processor that provides Ethernet and serial connectivity to radio cards connected on the Master Station backplane. This module features a 10-port Ethernet switch and USB hub for backplane connectivity to a number of radio modules.
Figure 6-4. Ethernet Port (RJ-45) Pinout (As viewed from the outside) Table 6-5. Ethernet Interface Pin Descriptions Pin Functions Ref. 1 Transmit Data (TX) High 2 Transmit Data (TX) Low 3 Receive Data (RX) High 4 Unused 5 Unused 6 Receive Data (RX) 7 Unused 8 Unused Low COM1 Interface supports the RS-232 serial data format at serial data rates of 300, 1200, 2400, 4800, 9600, 19200, 38400, 57600, and 115200 bps (asynchronous only).
Table 6-6. COM1 Pin Descriptions Pin Number Radio Input/ Pin Description Output 7 OUT CTS (Clear-to-Send)—Can be used for flow control or as an output to key another connected radio. 8 IN RTS (Request-to-Send)—Can be used for flow control or to key the transmitter. COM2 Interface The COM2 port supports the RS-232 or RS-485 serial data format at serial data rates of 300, 1200, 2400, 4800, 9600, 19200, 38400, 57600, and 115200 bps (asynchronous only).
Table 6-7. COM2 Pin Descriptions—Radio in RS-232 Mode Pin Number Radio Input/ Output Pin Description Table 6-8. COM2 Pin Descriptions—Radio in RS-485 Mode Pin Number Radio Input/ Output 1 -- Reserved—Do not connect 2 -- Reserved—Do not connect 3 -- Reserved—Do not connect 4 - Ground—Connects to ground (negative supply potential) on the radio’s PC board.
Mini USB Interface The USB Interface follows standard Mini-USB wiring and protocol. This interface can be used to access a command line user interface when connected to a computer USB port and the GE provided driver is installed. Refer to “Mini USB” on Page 22 for more information. 106 MDS™ Master Station MDS 05-6399A01, Rev.
6.4 SD Radio Modules Figure 6-7. SD Radio Module The SD Master Radio Modules are field replaceable, hot swappable, full duplex radios offering narrowband communications. Current offerings include variants that span 800-960MHz. Master station Radio modules are field replaceable and hot swappable. Refer to Section 8.4 Replacing Modules for information on removal and installation.
Technical Specifications The following are the key operating specifications for the SD Master Station 900MHz and 400MHz variants, as well as LN Master station. Items are separated into Transmit (TX) and Receive (RX) categories. Ongoing product improvements may result in specification changes, and GE MDS reserves the right to make such changes without obligation to any party. Should you require an exact specification for the build of your unit, please contact the factory for additional assistance.
Table 6-13. 400MHz SD Master Station Technical Specifications Transmit (TX) Parameter Specification Frequency Range 400-450 MHz (SDM4B) 450-512MHz (SDM4C)1 300-360 MHz (SDM4D)2 Frequency Stability <0.5 ppm, -30C to +60C TX Power Out +40.2 dBm maximum at radio card for-30 to +60C3 TX Frequency Response +/- 1.0 dB from 100 Hz to 2.
6.5 LN Radio Modules Figure 6-8. LN Radio Module (Part No. 03-6846A01-Lxx) The LN Master Radio Modules are field replaceable, hot swappable, radios offering narrowband communications. Master station Radio modules are field replaceable and hot swappable. Refer to Section 8.4 Replacing Modules for information on removal and installation.
Remote ACTIVE PWR/ALARM Red Green x Interface is operational. x Interface is currently the active NIC in the system. x The interface is not connected to an access point. Technical Specifications The following are the key operating specifications for the LN Master station radio modules. Items are separated into Transmit (TX) and Receive (RX) categories. Ongoing product improvements may result in specification changes, and GE MDS reserves the right to make such changes without obligation to any party.
Table 6-16. 700MHz LN Master Station Technical Specifications Transmit (TX) Parameter Specification Frequency Range 757-788 MHz Frequency Stability <0.5 ppm, -30C to +60C +38.8dBm (-0.2/+0.35dB),, Peak at radio card for-30 to +60C1 TX Power Out +36.2dBm (+/-0.
Table 6-17. 400MHz LN Master Station Technical Specifications Transmit (TX) Parameter Specification Frequency Range 330-406MHz (L4A) 406.1-470MHz (L4E) 1 Frequency Stability <0.5 ppm, -30C to +60C +38.8dBm (-0.2/+0.35dB),, Peak at radio card for-30 to +60C2 TX Power Out +37.2dBm (+/-0.
Table 6-18. 200MHz LN Master Station Technical Specifications Transmit (TX) Parameter Specification Frequency Range 216-235 MHz (216-222 MHz FCC/IC) Frequency Stability <0.5 ppm, -30C to +60C +38.8dBm (-0.2/+0.35dB),, Peak at radio card for-30 to +60C1 TX Power Out Agency Approvals +36.2dBm (+/-0.
Table 6-19. 100MHz LN Master Station Technical Specifications Transmit (TX) Parameter Specification Frequency Range 150-174 MHz Frequency Stability <0.5 ppm, -30C to +60C +38.8dBm (-0.2/+0.35dB),, Peak at radio card for-30 to +60C1 TX Power Out Agency Approvals +36.2dBm (+/-0.
Table 6-20. Alarm Modules Part Number Description System Interfaces and Indicators RX/TX RF Connection for Radio A, Radio B, and OUT. 03-6847Axx Alarm/Relay Module Relay to switch RF OUT based on active A or B.
Table 6-21. 6847 Alarm Module RF Performance 100-1000MHz Frequency Band Power Handling +42dBm, Maximum Frequency (MHz) 100 200 300 400 500 600 700 800 900 1000 Insertion Loss RF Connector Type Loss (dB) 0.2 0.4 0.5 0.5 0.6 0.7 0.8 0.8 0.8 0.8 Dual FAKRA-SMB The Alarm or Alarm/Relay module does not support hot swappable field replacement; power must be removed from the system before removal or installation of this device. Refer to Section 8.
- Pin 5 connects to an external keying source. Shorting pins 5 to pin 7 can key the radio when PTT LOW is configured in software. When PTT is configured high in software, pulling PTT to 3.3V keys the radio. The interface is compatible with an external VOX adapter, although this product features an integrated VOX circuit with digital threshold control. For applications using the external VOX adapter, 12VDC on pin 6 can be used to power the external module.
6.7 Duplexer Tray Current Master Station offerings always include a Duplexer tray whether or not an internal duplexer is included. The duplexer tray is cabled to the Alarm Relay Module, in a redundant unit, or to the Radio Module if non-redundant. This is cabled on the front of the master station from TX to RF-1 and from RX to RF-2. The cabling inside of the duplexer tray is dependent on the frequency plan, whether transmit or receive is on the higher frequency.
7.0 SPECIAL CONFIGURATIONS 7.1 Migrating “A” Modem Networks Mitigation strategy for mixed SDx/x710 repeater networks using the “A” modem One key aspect of the MPRS MDS Master Station is that it’s backward compatible with the 9790. In many respects, in fact, the Master Station’s performance is superior to that of the 9790. For example, the sensitivity of the Master Station is better than that of the 9790.
“A” Modem SDx/SDMS Polling Remote SCD 9710/SDx Remote SCD 9600 8ms 12ms The following table provides the appropriate PTT values for the various baud formats that are used with the most commonly used “A” modem in mixed repeater networks, that is, modem 9600.
8.0 TROUBLESHOOTING If trouble occurs with the unit, verify that it meets the basic requirements listed below. These items should be checked prior to starting any detailed troubleshooting or calling for assistance. All units must have: - Adequate and stable primary power - Secure cable and wiring connections - Proper configuration for the application - ALL modules securely tightened into the chassis using at least 10 inch-pounds of torque.
Table 8-1. Status LEDs – Normal Operation Platform Manager Active SD Radio Module Standby SD Radio Module (if present) Alarm Module PWR BLUE ALARM OFF ETH1/ETH2 Flashing with Ethernet traffic PWR/ALARM GREEN ACTIVE GREEN TX Flashing BLUE when transmitting RX Flashing BLUE when receiving PWR/ALARM GREEN ACTIVE OFF TX OFF RX OFF ALARM MAJ. OFF ALARM MIN.
switch can remain in the automatic position, and the active radio can be selected via the web UI, or CLI. 8.3 Technical Assistance Factory technical assistance is available by contacting GE MDS during business hours (8:30 AM to 6:00 PM Eastern Time). For telephone assistance, call (585) 241-5510, or visit our website at www.gemds.com for additional contact options. 8.
6844 +/- 36-75 VDC Power Supply Module +/- 36-75 VDC. 3.5 A Max DC Power Supply Module. 6845 +/- 75-140 VDC Power Supply Module +/- 75-140 VDC. 2 A Max DC Power Supply Module. DC power supply modules are available for several different input ranges. These modules have interchangeable connectors. Make sure the supply is within the rating for the module installed.
The manual override toggle switch is locking, and must be pulled out to change positions. Switch functions are as follows: - Up —Radio A; - Down — Radio B; - Center — Automatic. Once a new Radio Module is installed, the Select Switch should be returned to the Center (Automatic) position for redundant operation. A newly installed Radio Modules may require firmware reprogramming and configuration update from the Platform Manager.
than to have it realigned. Bandpass-Type Duplexers These duplexers (Figure 8-2. 900 MHz Bandpass Duplexer) typically allow the transmitter frequency to change up to 500 kHz without undesired results. Since this type of duplexer cannot be re-aligned in the field, we recommend contacting the GE MDS Technical Support Department if you suspect a duplexer problem or need one for a different frequency. Figure 8-2.
Disconnect the antenna cables from the back of the chassis. Internal Duplexer Cabling - A number of different duplexers can be installed in the radio. While the physical appearance of the duplexer may vary slightly, its operation and removal remain the same. Disconnect the SMA cables from the front of the duplexer tray Remove the two screws on the top of the unit that secure the duplexer tray into the front of the chassis.
Remove four screws to remove the duplexer assembly from the tray MDS 05-6399A01, Rev.
Figure 8-3. Internal Duplexer Removal Use care when removing the duplexer. Physical damage may cause detuning. 130 MDS™ Master Station MDS 05-6399A01, Rev.
9.0 TECHNICAL REFERENCE DATA 9.1 RF Propagation Planning Establishing a reliable point-to-point radio link requires system planning and design. You should have an understanding of the physical parameters affecting propagation. The following material discusses these factors and will assist you in designing a dependable transmission path for your radio link. This section is intended for use as a guideline when planning transmission paths.
which is represented by treating the earth as though it were slightly flatter than it actually is. Experience has shown that if we consider the earth’s radius 4/3rds of its actual size, we get good agreement between theory and measured propagation results. The figure below shows a representation of the 4/3 earth “radio horizon.
Fresnel Zone Boundary nd 1 d2 F n = 17.
9.2 dBm-Volts-Watts Conversion Chart The dBm-Volts-Watts Conversion Chart below is provided as a convenience for determining the equivalent voltage or wattage of an RF power expressed in dBm. Table 9-1.
10.0 GLOSSARY OF TERMS & ABBREVIATIONS If you are new to wireless data systems, some of the terms in this guide may be unfamiliar. The following glossary explains many of these terms and can prove helpful in understanding the operation of the Master Station. While some entries may not appear specifically in the text of this manual, they are included to promote a more complete understanding of wireless data networks, both of current and legacy design.
slight antenna movement or changing atmospheric losses. A fade margin of 20 to 30 dB is usually sufficient in most systems. FPGA—Field Programmable Gate Array. Frame—A segment of data that adheres to a specific data protocol and contains definite start and end points. It provides a method of synchronizing transmissions. Gate—An operating mode of the transceiver with respect to diagnostic/management activities. See also NODE, PEER, and ROOT.
Payload data—This is the application’s communication data which is sent over the radio network. Peer—An operating mode of the transceiver with respect to diagnostic/management activities. See also GATE, NODE, and ROOT. Point-Multipoint System—A radio communications network or system designed with a central control station that exchanges data with a number of remote locations equipped with terminal equipment. Poll—A request for data issued from the host computer (or master PLC) to a remote radio.
Transparent Mode—A mode in which payload data remains unchanged from its original format when it is sent over the air. A radio in this mode is said to be “transparent” to connected equipment at each end of a link. TX—Abbreviation for “Transmit.” See also RX. VLAN—Virtual Local Area Network WAN—Wide Area Network x710—The generic name for GE MDS legacy transceiver-family products, including the MDS 9710 (900 MHz), MDS 4710 (400 MHz), 2710 (200 MHz) and MDS 1710 (100 MHz).
IN CASE OF DIFFICULTY... Our products are designed for long life and trouble-free operation. However, this equipment, as with all electronic equipment, may have an occasional component failure. The following information will assist you in the event that servicing becomes necessary. TECHNICAL ASSISTANCE Technical assistance for GE MDS products is available from our Technical Support Department during normal business hours (8:30 A.M.–6:00 P.M. Eastern Time).
