Gateway Series G100 / G200 Administrator Manual 601-00020 Rev.
Digium, Inc. 445 Jan Davis Drive Huntsville, AL 35806 United States Main Number: 1.256.428.6000 Tech Support: 1.256.428.6161 U.S. Toll Free: 1.877.344.4861 Sales: 1.256.428.6262 www.digium.com www.asterisk.org www.asterisknow.org © Digium, Inc. 2012 All rights reserved. No part of this publication may be copied, distributed, transmitted, transcribed, stored in a retrieval system, or translated into any human or computer language without the prior written permission of Digium, Inc. Digium, Inc.
Safety Certification and Agency Approvals Safety: UL 60950-1, 2nd Edition CSA C22.2 No.
FCC Part 15 This equipment has been tested and found to comply with the limits for a Class A digital device, pursuant to Part 15 of the FCC Rules. These limits are designed to provide reasonable protection against harmful interference in a residential installation. This equipment generates, uses, and can radiate radio frequency energy and, if not installed and used in accordance with the instructions, may cause harmful interference to radio communications.
Introduction to Gateway Series Documentation This manual contains product information for the Gateway Series appliances. Be sure to refer to any supplementary documents or release notes that were shipped with your equipment. The manual is organized in the following manner: Chapter/ Appendix Title Description 1 Overview Identifies the features of your unit. 2 Unit Installation Provides instructions for installing the unit. 3 Configuration Provides instructions on how to configure the unit.
Symbol Definitions Caution statements indicate a condition where damage to the unit or its configuration could occur if operational procedures are not followed. To reduce the risk of damage or injury, follow all steps or procedures as instructed. The ESD symbol indicates electrostatic sensitive devices. Observe precautions for handling devices. Wear a properly grounded electrostatic discharge (ESD) wrist strap while handling the device.
Important Safety Instructions Servicing. Do not attempt to service this unit. There are no user-serviceable parts inside. Refer servicing to qualified service personnel. Batteries. The batteries in the unit are not user-serviceable. Refer servicing to qualified service personnel. CAUTION - Risk of explosion if battery is replaced by an incorrect type. Batteries should be disposed of according to the local laws and regulations of your region.
TABLE OF CONTENTS Chapter 1 Overview . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12 Echo-Cancellation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15 Chapter 2 Unit Installation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16 Unpacking the Unit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17 Shipment Inspection . . . . . . . . . . . . . . . . . . . . . . . . .
Table Of Contents Appendix A Pin Assignments . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 59 Appendix B Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 61 Appendix C Glossary and Acronyms . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 62 Digium, Inc.
List of Figures Figure 1: Figure 2: Figure 3: Figure 4: Figure 5: Figure 6: Figure 7: Figure 8: Figure 9: Digium, Inc. TDM PBX to VoIP Scenario . . . . . . . . . . . . . . . . . . . 14 VoIP PBX to TDM Scenario . . . . . . . . . . . . . . . . . . . 14 G100 Single Port Appliance . . . . . . . . . . . . . . . . . . . 19 G200 Dual Port Appliance . . . . . . . . . . . . . . . . . . . . 20 Side-by-side Rack Mounting . . . . . . . . . . . . . . . . . . . 28 Acceptable Wall Mount Orientations . . . . . . . . . .
List of Tables Table 1: Table A-1: Table A-2: Digium, Inc. Gateway Series Models. . . . . . . . . . . . . . . . . . . . . . 22 Gigabit Ethernet Port Pinouts . . . . . . . . . . . . . . . . . . 59 RJ45 T1/E1 Port Connector. . . . . . . . . . . . . . . . . . . .
Chapter 1 Overview Digium's Gateway Series is a converged media gateway product line designed to interface between TDM (T1/E1) and IP networks (SIP). The Gateway Series connects legacy telephone systems to IP networks and seamlessly integrates VoIP PBXs with the PSTN. Powered by innovative hardware and software solutions, Digium’s Gateway Series are managed by a simple, intuitive web-based interface. Digium, Inc.
Chapter 1: Overview Supported Voice Modes: PRI CPE and PRI NET (T1 / E1) – National ISDN 1 / NI1 – National ISDN 2 / NI2 – EuroISDN – 4ESS (AT&T) – 5ESS (Lucent) – DMS100 – Q.SIG E&M (T1 only) – Wink – Feature Group B – Feature Group D FXO and FXS (T1 only) – Ground Start – Loop Start – Loop Start with Disconnect Detect SIP Example scenarios utilizing the Gateway Series are illustrated in Figure 1 and Figure 2 on page 14. Digium, Inc.
Chapter 1: Overview Figure 1: TDM PBX to VoIP Scenario Figure 2: VoIP PBX to TDM Scenario Digium, Inc.
Chapter 1: Overview Echo-Cancellation Administrators connecting their Gateway Series appliances to the PSTN or other devices are likely to be placing calls that will result, at some point, in an unbalanced 4-wire/2-wire hybrid. The result of this hybrid is the reflection of a near-end echo to the calling party. Elimination of this echo is the responsibility of echo cancellation. The Gateway Series appliance utilizes hardware-based voice processors for echo cancellation and codec transcoding.
Chapter 2 Unit Installation This chapter provides the following information: Unpacking the Unit on page 17 Shipment Inspection on page 18 Front Panel Identification on page 19 Unit Identification on page 22 Hardware Installation on page 23 Note: The Gateway Series appliance installation instructions are written so that they will apply to any model in the series. Examples and model specific information are included as needed. Digium, Inc.
Chapter 2: Unit Installation Unpacking the Unit When you unpack your unit, carefully inspect it for any damage that may have occurred in shipment. If damage is suspected, file a claim with the carrier and contact the reseller from which the unit was purchased. If the unit was purchased direct from Digium, contact Digium Technical Support at +1.256.428.6161. Keep the original shipping container to use for future shipment or proof of damage during shipment.
Chapter 2: Unit Installation Shipment Inspection The following items are included in shipment of a Gateway Series appliance: Gateway Series appliance Power cord with attached T1/E1 loopback plug Mounting brackets (2 each) Bracket mounting screws, #8-32 black truss head, Phillips, 3/16” length (6 each) Side-by-side mounting screws, #6-32 pan head, Phillips, 3/16” length (3 each) Side-by-side mounting shoulder washers (3 each) Rubber feet (4 each) Ground nut Double-crimp ground ring termina
Chapter 2: Unit Installation Front Panel Identification This section describes the components on the front panel of the Gateway Series models. USB Recovery Gigabit Ethernet Device Status Ethernet Status T1/E1 Status T1/E1 Port Figure 3: G100 Single Port Appliance Digium, Inc.
Chapter 2: Unit Installation USB Recovery Gigabit Ethernet Device Status Ethernet Status T1/E1 Status T1/E1 Port Figure 4: G200 Dual Port Appliance Device Status - This LED corresponds to the status of the Gateway Series appliance. See Frequently Asked Questions on page 55 for more information. Gigabit Ethernet - This 10/100/1000BaseT Ethernet port provides the ability to connect to an internal or external network using an RJ45 interface and supports Auto-MDIX.
Chapter 2: Unit Installation USB Recovery - This port can be used to perform a firmware recovery and configuration reset. See Firmware Recovery and Configuration Reset on page 53 for more information. Warning! The USB Recovery port provides a limited amount of current which is sufficient only to power a USB flash drive. Do not connect any other type of device to this port. The USB flash drive should be fully USB 2.0 compliant. T1/E1 Port(s) - These ports are used for connecting T1 or E1 cables.
Chapter 2: Unit Installation Unit Identification The defining characteristic of the Gateway Series models are the number of ports supported. See Table 1 for a list of the various models. Table 1: Gateway Series Models Model Type Ports G100 T1/E1 1 G200 T1/E1 2 Digium, Inc.
Chapter 2: Unit Installation Hardware Installation This section describes how to properly install the hardware for a Gateway Series appliance. Caution Only qualified service personnel should continue with hardware installation and configuration of the Gateway Series appliance. Users should not attempt to perform these functions themselves. Caution This equipment is intended for use in Restricted Access Areas only where equipotential bonding has been applied.
Chapter 2: Unit Installation terminal to the ground lug using the ground nut. The ground nut must be turned clockwise to tighten it onto the ground lug. The opposite end of the wire that is connected to the ground ring terminal should be securily fastened to an unpainted metalic section of a properly earth grounded equipment rack. A connector for the opposite end of the wire is not provided with the Gateway Series appliance.
Chapter 2: Unit Installation Mounting The included hardware allows the Gateway Series appliance to be wall mounted, rack mounted side-by-side with another Gateway Series appliance, or placed flat on a level surface. If a single Gateway Series appliance is to be rack mounted, the optional long mounting bracket (not supplied, part number 3244-00042) must be used. The optional long mounting bracket can be ordered by contacting a Digium reseller or Digium directly.
Chapter 2: Unit Installation Important If the Gateway Series appliance is installed in a system that is in turn installed in a closed or multi-unit rack assembly, the operating ambient temperature of the rack environment may be significantly greater than the room ambient.
Chapter 2: Unit Installation Side-by-side Rack Mount: In order to rack mount the Gateway Series appliance side-by-side with another Gateway Series appliance, place one of the short mounting brackets on the front of the left side of the first Gateway Series appliance. Line up the holes from the mounting bracket to the threaded holes on the front of the left side of the first Gateway Series appliance. Two #8 black truss head screws should be inserted and turned clockwise to fasten the mounting bracket.
Chapter 2: Unit Installation Figure 5: Side-by-side Rack Mounting Wall Mount: In order to wall mount the Gateway Series appliance, the short mounting brackets should be flipped and rotated, and fastened on the middle of the right and left sides of the Gateway Series appliance as shown in Figure 6 on page 29. The unit should be mounted at or below eye level to properly view the LEDs. In addition, the Gateway Series appliance should be properly oriented as shown in Figure 6.
Chapter 2: Unit Installation If the Gateway Series appliance is placed in the “right side down” orientation, the 2 remaining #8 black truss head mounting screws should be fully inserted into the screw holes near the front of the right side of the Gateway Series appliance. In addition, the three #6 pan head screws should be fully inserted into the side-by-side holes on the right side of the first Gateway Series appliance. Note: The Gateway Series appliance must be properly grounded for safety reasons.
Chapter 2: Unit Installation Level Surface: In order to place the Gateway Series appliance flat on a level surface, the rubber feet should be adhered to the 4 corners of the bottom of the Gateway Series appliance. This will help secure the Gateway Series appliance to the surface it is placed on. Note: The Gateway Series appliance must be properly grounded for safety reasons. If the unit is not properly grounded, damage could arise to the unit and/or other equipment connected to the unit. Digium, Inc.
Chapter 2: Unit Installation Connecting Ports A description of each of the front panel connectors on a Gateway Series appliance is available in the section titled Front Panel Identification on page 19. Please refer to that section to determine what should be connected to each connector. Caution This unit must be connected to the Telecommunications Network in your country using an approved line cord, e.g.: for Australia use only line cords complying with ACA Technical Standard TS008.
Chapter 2: Unit Installation Connecting to the Gateway Series The Gateway Series web GUI may be accessed by either its DHCP or statically assigned IP address. The following browsers are supported: IE 9 Firefox 8 or newer Chrome 15 Safari 5 Connecting via DHCP assigned IP address 1.
Chapter 2: Unit Installation Gateway Series appliance. The default username for the Gateway Series web GUI is admin, and the default password is admin. Note: The Gateway Series appliance may also be accessed by its hostname.
Chapter 2: Unit Installation Gateway Series web GUI may be accessed from your computer. Network settings for computer connecting to Gateway Series IP: 192.168.69.2 Netmask: 255.255.255.0 Broadcast: 192.168.69.255 2. Using a Gateway Series supported web browser, open a browser window and enter the IP address for the Gateway Series appliance using HTTPS (e.g. https://[IP]). If you do not connect using HTTPS, a browser error will be displayed. The default IP address for the Gateway Series web GUI is 192.168.
Chapter 2: Unit Installation IP Configuration The general networking and configuration server options in the Gateway Series web GUI should be configured before others. Note: Saving changes to the IP configuration requires a restart, resulting in all active calls being dropped. We recommend against making these changes during business hours. Figure 7: IP Configuration Menu Digium, Inc.
Chapter 2: Unit Installation The General Networking Options are described below. Hostname - Specify the hostname of the Gateway Series appliance. Obtain an IP Address via DHCP - If a DHCP server exists on the same network as the Gateway Series appliance, this feature may be enabled for the IP address to be dynamically assigned via DHCP. Note: It is recommended that this feature be disabled if the DHCP server is not configured to always provide the same IP address based on MAC address.
Chapter 2: Unit Installation Also Continue Using Default Install IP Address - Leaving this option enabled will allow the Gateway Series appliance to listen for network requests on its factory default IP address. Note: For security purposes, it is recommended that this feature be disabled after initial IP configuration is complete. After this feature is disabled, the Gateway Series appliance will be accessible only from the IP address that is assigned by the DHCP server or statically configured.
Chapter 2: Unit Installation server. The MAC address of the Gateway Series appliance is printed on a label on the back of the unit. FTP and HTTP normally do not require a username and password. The Configuration Server options are specified below. Reload Remote Config on Reboot - Leaving this option enabled will allow the Gateway Series appliance to request that its configuration be reloaded from a configuration server on every reboot.
Chapter 3 Configuration The Gateway Series appliances have a variety of configuration options. This chapter provides information on how to use the Gateway Series web GUI to configure an appliance without the need of command-line tools, and an overview of the available configuration sections. Context-sensitive help buttons are provided above most sections of the Gateway Series web GUI.
Chapter 3: Configuration The Gateway Series appliance should already be connected to your network or computer, as described in Connecting to the Gateway Series on page 32. Using a Gateway Series supported web browser, open a browser window and enter the IP address for the Gateway Series appliance using HTTPS (e.g. https://[IP]). If you do not connect using HTTPS, a browser error will be displayed. The login screen will be displayed. An administrator username and password must be entered to proceed.
Chapter 3: Configuration It is highly recommended that the software on a Gateway Series appliance be updated to the latest version before proceeding with configuration. See Software Updates on page 50. Digium, Inc.
Chapter 3: Configuration The Gateway Series web GUI is divided into the following main sections. Settings and Configuration on page 43 Logging and Reporting on page 47 Status and Diagnostics on page 48 Maintenance on page 50 Figure 9: Main Menu Digium, Inc.
Chapter 3: Configuration Settings and Configuration This section provides the ability to configure SIP and TDM settings, create call routing groups and rules, manage system administrators, and set up networking. Included are the following sections.
Chapter 3: Configuration Advanced SIP Settings This section provides the ability to add and modify advanced SIP settings. These settings are for experienced administrators only. Please take care when modifying any of these settings. The default values should be sufficient for most applications. Included are the following sections.
Chapter 3: Configuration Call Routing Rules This section provides the ability to add and modify call routing rules. A call routing rule determines how a call is handled based upon certain characteristics such as inbound channel and DID. It is also possible to manipulate matched numbers before connecting outbound calls. System Administrators This section provides the ability to add and modify system administrators for access to the Gateway Series web GUI.
Chapter 3: Configuration Access Control This section provides the ability to limit access to the web GUI and SIP traffic through the Gateway Series appliance. All other protocols are blocked. Digium, Inc.
Chapter 3: Configuration Logging and Reporting This section provides the ability to configure and view system statistics and logging of the Gateway Series appliance. Included are the following sections. Statistics - Displays statistics for active calls and calls processed, and displays a summary of active calls in progress System Log - Settings for system logging via Syslog Digium, Inc.
Chapter 3: Configuration Status and Diagnostics This section provides the ability to view connection status, system information, perform advanced debugging, and troubleshoot problems with diagnostic tools. Included are the following sections. Connection Status on page 48 System Information on page 48 Advanced Debugging on page 49 Technical Support on page 49 Connection Status This section provides the ability to view the connection status of network interfaces, SIP endpoints, and T1/E1 interfaces.
Chapter 3: Configuration Advanced Debugging This section provides the ability to record and download debug logs for troubleshooting. Included are the following sections.
Chapter 3: Configuration Maintenance This section provides the ability to perform configuration backups, perform system updates, set the system clock, reboot, and restore factory settings. Included are the following sections. Backups on page 50 Software Updates on page 50 System Clock on page 51 System Reset on page 51 Backups This section provides the ability to create and restore a backup. Included are the following sections.
Chapter 3: Configuration Internet connection, it may take a few minutes to complete downloading. The software update will take about 5 minutes to complete. If the Gateway Series appliance is not connected to the Internet, the latest software can be obtained at http://downloads.digium.com/pub/telephony/gateway/firmware/. Save the firmware file to your desktop. Then manually install it from the Software Updates section.
Chapter 4 Troubleshooting This chapter provides information regarding troubleshooting tools, frequently asked questions, and possible resolutions as identified by Digium Technical Support. Multiple resources are available to obtain more information about Asterisk and Digium products. Please visit both www.digium.com and www.asterisk.org for more information. Digium, Inc.
Chapter 4: Troubleshooting Firmware Recovery and Configuration Reset If a Gateway Series appliance is behaving unexpectedly or the password is forgotten, a firmware recovery may need to be performed. The USB Recovery port can be used to perform a firmware recovery using a recovery image. The recovery image reformats the Gateway Series’ root filesystem and reloads the appropriate software on it.
Chapter 4: Troubleshooting Next, power off the Gateway Series appliance. Then insert the USB flash drive into the USB Recovery port. Power on the Gateway Series appliance. The Gateway Series appliance will boot from the USB Recovery port and process the recovery image which was placed on the USB flash drive. Warning! Do not disconnect power during this process. The recovery process will take at least 3 minutes to complete. During this process, the Device Status LED will turn red for a fraction of a second.
Chapter 4: Troubleshooting Frequently Asked Questions What do the colors of the Device Status LED indicate? Red - Hardware is initializing. Amber - Software is initializing. Hardware is initialized. Green - Hardware and software are fully initialized and running.
Chapter 4: Troubleshooting What type of cable do I need for the T1/E1 ports on a Gateway Series appliance? A straight-through RJ45 T1/E1 cable is needed for connecting to the RJ45 ports on a Gateway Series appliance when connecting to the PSTN. If connecting to a TDM PBX, a crossover RJ45 T1/E1 cable may be required. The appropriate cables may be ordered from Digium by visiting www.digium.com. Refer to Table A-2 on page 60 for pin assignments. There is a slight echo.
Chapter 4: Troubleshooting Where can I find answers to additional questions? Digium Technical Support (+1.256.428.6161), or Toll Free in the U.S. (+1.877.344.4861), is available 7am-8pm Central Time (GMT -6), Monday - Friday. Please refer to Free Installation Support on page 58 for additional information on how to obtain assistance from Digium Technical Support. Digium, Inc.
Chapter 4: Troubleshooting Free Installation Support Digium hardware products include free installation support. In order to receive this support, register your Digium product using the serial number located on the serialization label of your Digium unit. Steps to receive installation support: 1. Record your product serial number. 2. Register your product at http://www.digium.com/register. 3. E-mail Digium Support via support@digium.com, or telephone via +1.256.428.6000 or Toll-Free +1.877.DIGIUM.1.
Appendix A Pin Assignments The RJ45 (8P8C) port labeled ETH on the Gateway Series appliance is 8-pin. The pin assignments are identified in Table A-1. Note: Category 5e or Category 6 cables are required for Gigabit (1Gbps) operation up to 100 meters. Category 5 cables will work for short runs, but the link speed may be limited over long distances. Table A-1: Gigabit Ethernet Port Pinouts Diagram Pin 1 Digium, Inc.
Appendix A: Pin Assignments All RJ45 (8P8C) ports labeled T1/E1 on the Gateway Series appliance are 8-pin. RJ45 jacks are also commonly referred to as RJ48 when used for telecommunication. The pin assignments are identified in Table A-2. Table A-2: RJ45 T1/E1 Port Connector Pin 8 Digium, Inc.
Appendix B Specifications This appendix provides specifications, required environmental conditions, and maximum power consumption for the Gateway Series appliances. Physical (All Units). Size: 8.6” × 9.0” × 1.72” (21.84 x 22.86 x 4.37 cm) Weight: 2 lbs 12 oz (1,247.38 gm) Interfaces. Local Loop Access: E1, T1, PRI; RJ45 (A.K.A RJ48) USB: Standard Type A Receptacle Ethernet Access: 10/100/1000base-T; RJ45 Power: Standard 3-pin IEC320-C13 Environment.
Appendix C Glossary and Acronyms 8P8C 8 position 8 conductor Module connector commonly used to terminate twisted pair. ANSI American National Standards Institute An organization which proposes and establishes standards for international communications. asynchronous Not synchronized; not timed to an outside clock source. Transmission is controlled by start bits at the beginning and stop bits at the end of each character.
Appendix C: Glossary and Acronyms bps bits per second A measurement of transmission speed across a data connection. BRI Basic Rate ISDN broadband Broadband transmission shares the bandwidth of a particular medium (copper or fiber optic) to integrate multiple signals. The channels take up different frequencies on the cable, integrating voice, data, and video over one line. channel A generic term for an individual data stream.
Appendix C: Glossary and Acronyms CLEC Competitive Local Exchange Carrier A term for telephone companies established after the Telecommunications Act of 1996 deregulated the LECs. CLECs compete with ILECs to offer local service. See also LEC and ILEC. CO Central Office The CO houses local switching equipment. All local access lines in a particular geographic area terminate at this facility (which is usually owned and operated by an ILEC).
Appendix C: Glossary and Acronyms DS1 Digital Signal, Level 1 1.544 Mbps in North America (T1) and Japan (J1) -up to 24 voice channels (DS0s), 2.048 Mbps in Europe (E1) - up to 32 voice channels (DS0s). DS1/T1/E1 lines are part of the PSTN. DS3 Digital Signal, Level 3 T3 in North America and Japan, E3 in Europe. Up to 672 voice channels (DS0s). DS3/T3/E3 lines are not part of the PSTN. DTMF Dual Tone Multi-Frequency Push-button or touch tone dialing.
Appendix C: Glossary and Acronyms FXO Foreign Exchange Office Receives the ringing voltage from an FXS device. Outside lines are connected to FXO ports. FXS Foreign Exchange Station Initiates and sends ringing voltage. Phones are connected to FXS ports. G.711 A recommendation by the Telecommunication Standardization Sector (ITU-T) for an algorithm designed to transmit and receive mulaw PCM voice and A-law at a digital bit rate of 64 kbps. G.723.
Appendix C: Glossary and Acronyms HDLC High-Level Data Link Control A bit-oriented synchronous data link layer protocol developed by the International Organization for Standardization (ISO). IAX Inter-Asterisk eXchange The native VoIP protocol used by Asterisk. It is an IETF standard used to enable VoIP connections between Asterisk servers, and between servers and clients that also use the IAX protocol. iLBC internet Low Bitrate Codec A free speech codec used for voice over IP.
Appendix C: Glossary and Acronyms LED Light-emitting Diode Linux A robust, feature-packed open source operating system based on Unix that remains freely available on the internet. It boasts dependability and offers a wide range of compatibility with hardware and software. Asterisk is supported exclusively on Linux. loopback A state in which the transmit signal is reversed back as the receive signal, typically by a far end network element.
Appendix C: Glossary and Acronyms NT Network Termination A device connecting the customer's telephone or data equipment to the local ISDN exchange carrier's line. NT devices are connected to TE devices. PBX Private Branch Exchange A smaller version of a phone company’s large central switching office. Example: Asterisk. PCI peripheral component interconnect A standard bus used in most computers to connect peripheral devices.
Appendix C: Glossary and Acronyms PRI Primary Rate ISDN PSTN Public Switched Telephone Network A communications network which uses telephones to establish connections between two points. Also referred to as the dial network. PTMP Point-to-Multipoint A connection where data is broadcast between more than two endpoints. PTP Point-to-Point A connection restricted to two endpoints.
Appendix C: Glossary and Acronyms RJ11 A six-pin jack typically used for connecting telephones, modems, and fax machines in residential and business settings to PBX or the local telephone CO. RJ45 8P8C, un-keyed modular connector type for Ethernet over twisted pair. Predominantly used in LAN and uses Unshielded Twisted Pair cable. RJ48 8P8C modular connector type for T1 and ISDN termination over twisted pair. While RJ45 and RJ48 use the same connector, they differ in their wiring.
Appendix C: Glossary and Acronyms TDM Time Division Multiplexer A device that supports simultaneous transmission of multiple data streams into a single high-speed data stream. TDM combines signals by interleaving bits one after the other. TE Terminal Equipment A device that is established as a point of termination of a communications circuit or channel. Terminal equipment comprises all customer premises equipment (CPE). TE devices are connected to NT devices.
Appendix C: Glossary and Acronyms V Volts VoIP Voice over Internet Protocol Technology used for transmitting voice traffic over a data network using the Internet Protocol. Digium, Inc.
