Vanguard Managed Solutions 342 Port DCE Signal Function/Signal DTE Signal Pin Name Using

Cabling the Vanguard 342

DB25 X.21/V.11 Pinouts

Connector Pinout This table shows the DB25 X.21/V.11 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 3-5 on page 3-21for crossover cable connections:

Port 3	DCE Signal	Function/Signal	Port 3	DTE Signal	Function/Signal
Pin		Name	Pin	using	Name
				Crossover
				Adapter Cable
1	-------------	PROTECTIVE	1	-------------	PROTECTIVE
		GROUND			GROUND
2	<------------	TRANSMITTED	2	------------>	TRANSMITTED
		DATA-A			DATA-A
3	------------>	RECEIVED DATA-A	3	<------------	RECEIVED DATA-A
4	<------------	CONTROL-A	4	------------>	CONTROL-A
5	-------------	(no connection)	5	-------------	(no connection)
6	------------>	INDICATION-B	6	<------------	INDICATION-B
7	-------------	SIGNAL GROUND	7	-------------	SIGNAL GROUND
8	------------>	INDICATION-A	8	<------------	INDICATION-A
14	<------------	TRANSMITTED	14	------------>	TRANSMITTED
		DATA-B			DATA-B
15	------------>	SIGNAL ELEMENT	15	-------------	(no connection)
		TIMING-A
16	------------>	RECEIVED DATA-B	16	<------------	RECEIVED DATA-B
17	(no signal)	RECEIVE CLOCK-A	17	(no signal)	RECEIVE CLOCK-A
18	(no signal)	RECEIVE CLOCK-B	18	(no signal)	RECEIVE CLOCK-B
20	<------------	CONTROL-B	20	------------>	CONTROL-B
21	------------>	SIGNAL ELEMENT	21	-------------	(no connection)
		TIMING-B
22	<------------	EXTERNAL	22	------------>	EXTERNAL
		TRANSMIT			TRANSMIT
		CLOCK B			CLOCK B
24	<------------	EXTERNAL	24	------------>	EXTERNAL
		TRANSMIT			TRANSMIT
		CLOCK A			CLOCK A
25	--------------	(no connection)	25	-------------	(no connection)

Note

To use DTE mode, the Interface Options parameter must be set to XOVER. For details on setting the X.21/V.11 Interface Options, see “Setting the Interface Options” section on page 3-10.

3-20 Installation and Replacement