USER MANUAL MODEL 2701/I G.703/G.704 NTU with 10Base-T Ethernet Interface Important—This is a Class A device and is intended for use in a light industrial environment. It is not intended nor approved for use in an industrial or residential environment. Part# 07M2701I-UM Doc# 08609U2-001 Rev.
CONTENTS 1.0 1.1 1.2 1.3 1.4 1.5 Warranty & Compliance Information ........................................ Compliance................................................................................... EMC Compliance.......................................................................... Safety Compliance: ...................................................................... PSTN Regulatory Compliance:..................................................... CE Notice.......................................
A A.1 A.2 A.3 A.4 A.5 A.6 A.7 A.8 A.9 A.10 A.11 A.12 A.13 A.14 Specifications ........................................................................... 26 Network Data Rate ...................................................................... 26 Network Connector ..................................................................... 26 Nominal Impedance ................................................................... 26 Line Coding ......................................................................
1.0 WARRANTY & COMPLIANCE INFORMATION Patton Electronics warrants all Model 2701/I components to be free from defects, and will—at our option—repair or replace the product should it fail within one year from the first date of shipment. This warranty is limited to defects in workmanship or materials, and does not cover customer damage, abuse, or unauthorized modification. If this product fails or does not perform as warranted, your sole recourse shall be repair or replacement as described above.
1.2 CE NOTICE We certify that the apparatus identified in this document conforms to the requirements of Council Directive 1999/5/EC on the approximation of the laws of the member states relating to Radio and Telecommunication Terminal Equipment and the mutual recognition of their conformity. The safety advice in the documentation accompanying this product shall be obeyed. The conformity to the above directive is indicated by the CE sign on the device. 1.
1.5 SAFETY WHEN WORKING WITH ELECTRICITY • This device contains no user serviceable parts. The equipment shall be returned to Patton Electronics for repairs, or repaired by qualified service personnel. • The external power adapter shall be a listed Limited Power Source. Ensure that the power cable used meets all applicable standards for the country in which it is to be installed, and that it is connected to a wall outlet which has earth ground.
2.0 GENERAL INFORMATION Thank you for your purchase of this Patton Electronics product. This product has been thoroughly inspected and tested and is warranted for One Year parts and labor. If any questions or problems arise during installation or use of this product, please do not hesitate to contact Patton Electronics Technical Support at (301) 975-1007. 2.1 FEATURES • Terminates G.703 and G.
The Model 2701/I is a 10Base-T bridge that operates over G.703/G.704 lines. It uses MAC learning and forwarding to provide seamless LAN-toLAN connectivity. As a result, corporate enterprises can connect their servers to a pair of NTUs and automatically forward data packets that are meant for the remote network. Local packets are filtered and passed only to the local LAN.
3.0 PPP OPERATIONAL BACKGROUND PPP is a protocol used for multi-plexed transport over a point-to-point link. PPP operates on all full duplex media, and is a symmetric peer-topeer protocol, which can be broken into three main components: 1. A standard method to encapsulate datagrams over serial links; 2. A Link Control Protocol (LCP) to establish, configure, and test the data-link connection; 3. A family of Network Control Protocols (NCPs) to establish and configure different network layer protocols.
Figure 1. Cisco router with serial interface, configured as PPP Half Bridge. For example, the customer site is assigned the addresses 192.168.1.0/ 24 through 192.168.1.1/24. The address 192.168.1.1/24 is also the default gateway for the remote network. The above settings remove any routing/forwarding intelligence from the CPE. The associated Cisco configuration will set serial interface (s0) to accommodate half bridging for the above example. Authentication is optional under PPP.
4.0 CONFIGURATION The Model 2701/I features configuration capability via hardware DIP switches. This section describes all possible DIP switch configurations of the Model 2701/I. 4.1 DIP SWITCH CONFIGURATION The Model 2701/I has two sets of internal DIP switches that allow configuration for a wide range of applications. The sets of switches are accessed from the underside. Figure 3 shows the location of the DIP switches on the bottom of the printed circuit board. Figure 3.
Switch SW1 A detailed description of each switch (SW1-1 through SW1-5) setting follows the summary table below: Switch SW-1 through SW1-5. Use Switches SW1-5 to set the DTE data rate.
SW1 SW2 SW3 SW4 SW5 Speed Off On Off On Off On Off On Off On Off On Off Off On On Off Off On On Off Off Off Off Off On On On On Off Off Off Off On On On Off Off Off Off Off Off Off Off Off Off Off Off Off Off Off Off Off Off Off 1408 kbps 1472 kbps 1536 kbps 1600 kbps 1664 kbps 1728 kbps 1792 kbps 1856 kbps 1920 kbps 1984 kbps Clear Channel 2048 kbps Note When the data rate is set to 2.048Mb/s, the unit is forced into G.703 mode, and it transmits user data on all 32 time-lots.
Switch SW2 A detailed description of each switch (SW1-1 through SW1-5) setting follows the summary table below: Switch SW2-1 Line Coding: HDB3 (default). Use Switch SW2-1 to control the Network Line Coding options. Set these options to be the same as the Line Coding given to you by your Service Provider. If you are using two Model 2701/Is together as short range modems, set both units to HDB3.
cause problems, since the NTU receiving the signal relies on the signal to recover the 2.048 Mb/s clock. If you must use AMI, you should ensure that the data terminal equipment connected to the unit provides a minimally acceptable pulse density. For this reason, there are advantages to using HDB3 instead. AMI coding does not inherently account for ones density. To meet this requirement, the user should ensure that the data inherently meets pulse density requirements. Switch SW2-2: CRC-4 Multiframe.
V.54 loop when Remote Loop is selected by the front panel switches. If set to CSU, the Model 2701 will initiate a CSU loop when Remote Loop is selected by the front panel switches. S2-4 RDL Type Off On Initiate a V.54 RDL loop when selected Initiate a CSU loopback when selected Switch SW2-5 Front Panel Switches. As the Front Panel Switches may be inadvertently toggled, or in the event that the end-user may not need to use the switches, the installer may disable the front panel switches.
5.0 INSTALLATION WARNING The Interconnecting cables shall be acceptable for external use and shall be rated for the proper application with respect to voltage, current, anticipated temperature, flammability, and mechanical serviceability. Once the Model 2701/I is properly configured, it is ready to connect to the G.703/G.704 interface, to the Ethernet port, and to the power source. This section describes how to make these connections. 5.1 CONNECTING TO THE G.703 NETWORK The Power, G.703/G.
When using the 75 Ohm interface, jumper straps JP2, JP6, and JP7 must be installed over the jumpers. The jumpers are located next to the BNC connectors. Refer to the following section to open the case. Opening the Case Open the case by inserting a screwdriver into the slots and twist the screwdriver head slightly. The top half of the case will separate from the lower half of the case. Take caution not to damage any of the PC board mounted components. Connecting the Twisted Pair (120 ohm) to the G.
5.2 CONNECTING THE 10BASE-T ETHERNET PORT TO A PC (DTE) Figure 8. Connecting the 10Base-T Ethernet Port to a PC The 10Base-T interface is configured as DTE (Data Terminal Equipment). If the Model 2701/I is to to connect to another DTE device such as a 10Base-T network interface card, construct a 10Base-T crossover cable and connect the wires as shown in the diagram below (Figure 9). Figure 9. 10Base-T Cross-over Cable Connection 5.
5.4 POWER CONNECTION Universal AC Power (100–240 VAC) The Model 2701/I uses a 5VDC, 2A universal input 100-240VAC, power supply (center pin is +5V). The universal input power supply has a male IEC-320 power entry connector. This power supply connects to the Model 2701/I by means of a barrel jack on the rear panel. Many international power cords are available for the universal power supply. The Model 2701/I powers up as soon as it is plugged into an AC outlet-there is no power switch..
6.0 OPERATION When the Model 2701/I has been properly configured and installed, it should operate transparently. This sections describes power-up, LED status monitors, and the built-in loopback test modes. 6.1 POWER-UP Before applying power to the Model 2701/I, please read section 5.4, “Power Connection” on page 20 and ensure that the unit is properly connected to the appropriate power source.. 6.2 LED STATUS MONITORS The Model 2701/I features six front panel LEDs that monitor connections on the G.703/G.
10BT Link(Active Green) Solid green indicates that the 10BaseT Ethernet interface has detected a valid SQE heartbeat, signifying a valid 10BaseT connection. Status Blinks yellow from one to eleven times to indicate system status. Each pulse pattern is separated by a 2 second “off” period. Greater pulse patterns have higher priority (buffer saturation has greater priority than an empty MAC table).
6.3 LOOP (V.54 & TELCO) DIAGNOSTICS The Model 2701/I offers three V.54 loop diagnostics. Use these diagnostics to test the NTU and any communication links. These tests can be activated via the front panel switches. Operating Local Loopback (LL) The Local Loopback (LL) test checks the operation of the local Model 2701/I, and is performed separately on each unit. Figure 13. Local Loopback for a Network Termination Application To perform a LL test, follow these steps: 1. Activate LL.
Operating Remote Digital Loopback (RL) The Remote Digital Loopback (RL) test checks the performance of both the local and remote NetLink-E1™, as well as the communication link between them. Any characters sent to the remote NetLink-E1™ in this test mode will be returned back to the originating device. Figure 14. Remote Loop in a Network Extension Application There are two Remote Loops that can be initiated from the NetLink 2701/ I unit: (1) V.54 Loop, and; (2) CSU Loop.
down” command is implemented by the pattern “100” in the data stream for a minimum of 5 seconds. The NetLink 2701/I will respond to Universal Loopback De-activate to clear all central office loops. Using the V.52 (BER) Test Pattern Generator To use the V.52 BER tests in conjunction with the Remote Digital Loopback tests (or with Local Line Loopback tests), follow these instructions: 1. Locate the “511/511E” toggle switch on the front panel of the 2701/I and move it UP. This activates the V.
APPENDIX A SPECIFICATIONS A.1 NETWORK DATA RATE 2.048 Mbps A.2 NETWORK CONNECTOR RJ-48C/Dual Coax BNC A.3 NOMINAL IMPEDANCE 75/120 ohm A.4 LINE CODING Selectable AMI or HDB3 A.5 LINE FRAMING G.703 (Unframed) or G.704/G.732 (Framed) A.6 CRC-4 MULTIFRAMING Selectable On or Off A.7 CLOCKING Internal or Network (Receive Recover) A.8 TIME SLOT RATE 64 kbps A.
A.12 HUMIDITY Up to 90% non-condensing A.13 TEMPERATURE 0 to 50°C (32 to 122°F) A.14 DIMENSIONS Plastic Case – 9.0L x 5.3W x 2.0H cm (3.5L x 2.1W x 0.78H in.) Metal Case – 3.2L x 13.8W x 14.6H cm (1.25L x 5.43W x 5.
APPENDIX B ETHERNET 10BASE-T SPECIFICATIONS B.1 DTE INTERFACE 10Base-T on RJ-45F B.2 DTE DATA RATES 10Mbps B.3 LAN CONNECTION RJ-45, 10Base-T, 802.3 Ethernet B.4 PROTOCOL PPP (RFC 1661) with Bridging Control (RFC 1638) B.5 MAC ADDRESS TABLE SIZE 4096 entries B.6 MAC ADDRESS AGING MAC addresses deleted after 8 minutes of inactivity B.7 FRAME BUFFER 512 Frames B.8 FRAME LATENCY 1 frame B.9 DIAGNOSTICS 6V.54 Loopback; CSU Loopback; V.52 Patterns: 511 B.
APPENDIX C FACTORY REPLACEMENT PARTS AND ACCESSORIES Patton Model # Description 2701/B 2701/C 2701/D 2701/I 08055DCUI 07M2701 G.703/G.704 NTU with RS-530 interface G.703/G.704 NTU with a V.35 interface G.703/G.704 NTU with an X.21 interface G.703/G.
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