User manual

Appendix B. Pinouts
61200261L1-1 ATLAS Quad USSI Module User Manual B-3
Table B-4. Pinout for RS-232 Cable
Pin Signal Description Pin Signal Description
1 Shield (Ground) 14 Sec. Transmit Data
2 Transmit Data 15 DCE Transmit Clock
3 Received Data 16 Sec. Received Data
4 Request to Send 17 Receive Signal Element Timing
5 Clear to Send 18 Not used
6 Data Set Ready 19 Sec. Request to Send
7 Signal Ground 20 Data Terminal Ready
8 Received Line Signal Detector 21 Signal Quality Detector *
9 + Voltage * 22 Ring Indicator
10 - Voltage * 23 Data Signal Rate Selector *
11 Not used 24 DTE Transmit Clock
12 Sec. Received LIne Signal Indicator 25 Not used
13 Sec. Clear to Send
* Ignored by the Quad USSI Module
Table B-5. Pinout for CCITT X.21 (V.11) Cable
Pin Signal Description Pin Signal Description
1
Shield (Ground)
8
Signal Ground
2
Transmit Data (A)
9
Transmit Data (B)
3
Request to Send (A)
10
Request to Send (B)
4
Received Data (A)
11
Received Data (B)
5
Carrier Detect (A)
12
Carrier Detect (B)
6
Transmit/Receive Clock (A)
13
Transmit/Received Clock (B)
7
Ext. Transmit Clock (A)
14
Ext. Transmit Clock (B)
15
Not Used