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Appendix B. Pinouts
B-2
Pin
Signal Description
1
Shield (Ground)
2
Transmit Data (A)
3
Received Data (A)
4
Request to Send (A)
5
Clear to Send (A)
6
DCE Ready (A)
7
Signal Ground
8
Carrier Detect (A)
9
Received Clock (B)
10
Carrier Detect (B)
11
Ext. Transmit Clock (B)
12
Transmit Clock (B)
* Ignored by Quad USSI Module
Pin
Signal Description
1
Shield (Ground)
2
Signaling Rate Indicator*
3
Not Used
4
Transmit Data (A)
5
Transmit Clock (A)
6
Received Data (A)
7
Request to Send (A)
8
Receive Clock (A)
9
Clear to Send (A)
10
Local Loopback*
11
DCE Ready (A)
12
DTE Ready (A)
13
Carrier Detect (A)
14
Remote Loopback*
15
Ring Indicator
16
Select Frequency*
17
Ext. Transmit Clock (A)
18
Test Mode*
* Ignored by Quad USSI Module
ATLAS Quad USSI Module User Manual
Table B-2. Pinout for EIA-530A Cable
Pin
Signal Description
13
Clear to Send (B)
14
Transmit Data (B)
15
Transmit Clock (A)
16
Received Data (B)
17
Receive Clock (A)
18
Local LoopBack*
19
Request to Send (B)
20
DTE Ready (A)
21
Remote Loopback*
22
Ring Indicator
23
Signal Ground
24
Ext. Transmit Clock (A)
25
Test Mode *
Table B-3. Pinout for RS-449 Cable
Pin
Signal Description
19
Signal Ground
20
Receive Common*
21
Not Used
22
Transmit Data (B)
23
Transmit Clock (B)
24
Receive Data (B)
25
Request to Send (B)
26
Receive Clock (B)
27
Clear to Send (B)
28
Terminal in Service*
29
DCE Ready (B)
30
DTE Ready (B)
31
Carrier Detect (B)
32
Select Standby*
33
Signal Quality*
34
New Signal*
35
Ext. Transmit Clock (B)
36
Standby/Indicator*
37
Send Common*
61200261L1-1
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