Cabling the Vanguard 342
DB25 V.24 Pinouts
Connector Pinouts This table shows the DB25 V.24 connector pinouts for DCE/DTE mode. To use DTE to DTE or DCE to DCE mode, a crossover adapter cable is required. Refer to Figure
These pins are assigned double functions in the V.24 cable:
•Pin 15: Outputs TRANSMIT CLOCK if the port is configured for internal clocks. Otherwise it acts as a V.54 Loop 1 signal when connected to a modem.
•Pin 22: Used as the Ring Indicator output if the port is configured to emulate a dial modem. For this to work properly, the RI/TM port must be configured to RI. When the RI/TM is configured to TM, this pin acts as an input, and the TM output from the attached modem (pin 25 on the modem) comes into the Vanguard on this pin.
For more information on configuring the V.24 interface type, refer to the “Setting the Interface Type” section on page
Port3 |
| DCE | Function/Signal | Port 3 | DTE Signal using | Function/Signal |
Pin |
| Signal | Name | Pin | Crossover | Name |
|
|
|
|
| Adapter Cable |
|
|
|
|
|
|
|
|
1 | PROTECTIVE | 1 | PROTECTIVE | |||
|
|
| GROUND |
|
| GROUND |
|
|
|
|
|
|
|
2 | TRANSMITTED | 2 | TRANSMITTED | |||
|
|
| DATA |
|
| DATA |
|
|
|
|
|
|
|
3 | > | RECEIVED DATA | 3 | RECEIVED DATA | ||
|
|
|
|
|
|
|
4 | REQUEST TO SEND | 4 | REQUEST TO SEND | |||
|
|
|
|
|
|
|
5 | > | CLEAR TO SEND | 5 | CLEAR TO SEND | ||
|
|
|
|
|
|
|
6 | > | DATA SET READY | 6 | DATA SET READY | ||
|
|
|
|
|
|
|
7 | SIGNAL GROUND | 7 | SIGNAL GROUND | |||
|
|
|
|
|
|
|
8 | > | DATA CARRIER | 8 | DATA CARRIER | ||
|
|
| DETECT |
|
| DETECT |
|
|
|
|
|
|
|
14 | DATA RESTRAINT | 14 | DATA RESTRAINT | |||
|
|
|
|
|
|
|
15 | > | TRANSMIT CLOCK | 15 | TRANSMIT CLOCK | ||
|
|
|
|
|
|
|
16 | > | STANDBY | 16 | STANDBY | ||
|
|
| INDICATOR |
|
| INDICATOR |
|
|
|
|
|
|
|
17 | > | RECEIVE CLOCK | 17 | RECEIVE CLOCK | ||
|
|
|
|
|
|
|
18 | EXTERNAL | 18 | EXTERNAL | |||
|
|
| RECEIVE CLOCK |
|
| RECEIVE CLOCK |
|
|
|
|
|
|
|
20 | DATA TERMINAL | 20 | DATA TERMINAL | |||
|
|
| READY |
|
| READY |
|
|
|
|
|
|
|
21 | V.54 Loop 1 | 21 | V.54 Loop 1 | |||
|
|
|
|
|
|
|
22 | > | TEST MODE | 22 | TEST MODE | ||
|
|
|
|
|
|
|
24 | EXTERNAL | 24 | EXTERNAL | |||
|
|
| TRANSMIT CLOCK |
|
| TRANSMIT CLOCK |
|
|
|
|
|
|
|
25 | MAKE BUSY | 25 | MAKE BUSY | |||
|
|
|
|
|
|
|
Installation and Replacement |
