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This section describes the PRI and serial port interfaces the Cisco IP/VC 3525 Gateway use. The topics include:
The IP/VC 3525 Gateway uses a proprietary PRI interface. An adapter cable that converts the proprietary PRI configuration to the standard PRI configuration is shipped with the unit. This section provides pinout information for the gateway interface and for patch cables you can connect to the gateway interface.
Table D-1 shows pinout information for the IP/VC 3525 Gateway PRI port.
| Pin | Function |
3 | Receive (+) Tip2. |
4 | Transmit (-) Ring1. |
5 | Transmit (-) Tip1. |
6 | Receive (+) Ring 2. |
Table D-2 shows the pinout configuration of the IP/VC 3525 Gateway PRI port adapter cable. The adapter cable uses an RJ-48C connector to connect to a standard PRI interface and adapts it to the proprietary IP/VC 3525 Gateway PRI interface.
| Standard PRI Interface Female RJ-48C | IP/VC 3525 PRI Interface Male RJ-45 |
|---|---|
Pin 1---Receive (+) Ring 2 | Pin 6---Receive (+) Ring 2 |
Pin 2---Receive (+) Tip2 | Pin 3---Receive (+) Tip2 |
Pin 4---Transmit (-) Tip1 | Pin 4---Transmit (-) Tip1 |
Pin 5---Transmit (-) Ring1 | Pin 5---Transmit (-) Ring1 |
Table D-3 shows the configuration of a standard PRI interface patch cable.
| Standard Interface | Standard Interface |
|---|---|
Pin 1---Receive (+) Ring 2 | Pin 1---Receive (+) Ring 2 |
Pin 2---Receive (+) Tip2 | Pin 2---Receive (+) Tip2 |
Pin 4---Transmit (-) Tip1 | Pin 4---Transmit (-) Tip1 |
Pin 5---Transmit (-) Ring1 | Pin 5---Transmit (-) Ring1 |
Table D-4 shows the configuration for a standard crossover PRI patch cable. A crossover PRI patch cable may be require to connect the Cisco IP/VC 3525 Gateway to some switches or upstream PBX devices. Refer to the switch or PBX documentation for instructions on how to connect the device to PRI modules.
| Standard Interface | Crossover Interface |
|---|---|
Pin 1---Receive (+) Ring 2 | Pin 4---Transmit (-) Tip1 |
Pin 2---Receive (+) Tip2 | Pin 1---Receive (+) Ring 2 |
Pin 4---Transmit (-) Tip1 | Pin 5---Transmit (-) Ring1 |
Pin 5---Transmit (-) Ring1 | Pin 2---Receive (+) Tip2 |
The Cisco IP/VC 3525 Gateway is equipped with a serial port that can be used to assign the unit an IP address and to run the diagnostic program. The serial port uses null configuration.
Cisco IP/VC 3525 Gateways are shipped with a Terminal/Modem cable that is configured for null operation. The Terminal/Modem cable has a Y construction that allows you to connect the gateway directly to the serial port of a PC or through a modem (see Figure D-1). The cable has a male, D-type, 9-pin connector that plugs into the serial port on the gateway to a female, a D-type 9-pin connector that plugs into a PC serial port and a female, and a D-type 26-pin connector that plugs into a modem.
The pin-configuration the Cisco IP/VC 3525 Gateway serial interface uses is shown in Table D-5.
| Gateway Serial Connector | Function |
1 | Not Connected |
2 | Receive data. |
3 | Send data. |
4 | Not Connected |
5 | GND |
6 | Not Connected |
7 | Not Connected |
8 | Not Connected |
9 | Not Connected |
Posted: Mon Jun 5 12:37:05 PDT 2000
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