Vanguard Managed Solutions 342 Port3, Function/Signal Port DTE Signal using Pin Name

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 3-5 on page 3-21for crossover cable connections.

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 3-9.

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

3-18 Installation and Replacement