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This chapter provides cable connector and pin-out information for the VTA.
This section provides connector and cable information for the RJ-45 LAN port.
Following is the pin assignment for the LAN 10BaseT RJ-45 connector.
| Pin | Function | Direction |
1 | TXD+ | --> |
2 | TXD+ | --> |
3 | RXD+ | <-- |
4 | Not Connected | --- |
5 | Not Connected | --- |
6 | RXD- | <-- |
7 | Not Connected | --- |
8 | Not Connected | --- |
To connect the LAN port to a hub you need a straight-through Ethernet cable (see Figure B-2).
The null modem cable (crossover cable) is a Y-cable that connects the VTA to the configuration PC. It is used to set VTA IP addresses using a terminal session. The 9-pin male connector connects to the VTA's console (serial) port on the front panel; the 9-pin female connector connects to configuration PC (COM 1).
Table B-1 contains function and direction information for an EIA/TIA-232 9-pin male connector.
| EIA/TIA-232 9-Pin Male Connector | Function | Direction |
1 | Not Connected | --- |
2 | RXD | <-- |
3 | TXD | --> |
4 | Not Connected | --- |
5 | GND | --- |
6 | Not Connected | --- |
7 | Not Connected | --- |
8 | Not Connected | --- |
9 | Not Connected | --- |
Table B-2 contains function and director information for an EIA/TIA-232 9-pin female connector.
| EIA/TIA-232 9-Pin Female Connector | Function | Direction |
1 | Not Connected | --- |
2 | RXD | <-- |
3 | TXD | --> |
4 | DTR | --> |
5 | GND | --- |
6 | DSR | <-- |
7 | RTS | --> |
8 | CTS | <-- |
9 | Not Connected | --- |
To connect the VTA console port to a modem or a PC you need a null modem cable. Figure B-3 illustrates the connector configuration.
This cable connects the VTA to the H.320 room system. The 26-pin male connector connects to port 1 on the rear panel of the VTA; the other end of the cable has one V.35 female connector and one 25-pin D-type EIA/TIA-366 female connector. For 2B calls, two of these cables are required; the second cable's male connector connects to port 2 on the VTA.
Posted: Fri Nov 12 19:42:14 PST 1999
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