Appendix B Specifications
Datacom specifications
120 SmartClass E1 Tester User’s Guide
EIA-530 pin assignments
Table 48 lists the pin assignments for the EIA-530 interface.
Table 48 EIA-530 pin assignments
Pin
Signal
Description
Lead
Signal
Source
Circuit
Category
(422 or 423)
1 Shield N/A Ground N/A N/A
2 Transmitted Data A DTE BA 422
3 Received Data A DCE BB 422
4 Request to Send A DTE CA 422
5 Clear to Send A DCE CB 422
6 DCE Ready A DCE CC 422
7 Signal Ground N/A AB N/A
8 Received Line Sig-
nal Detector
A DCE CF 422
9 Receiver Signal Ele-
ment Timing
B DCE DD 422
10 Received Line Sig-
nal Detector
B DCE CF 422
11 Transmit Signal Ele-
ment Timing
BDTEDA 422
12 Transmit Signal Ele-
ment Timing
B DCE DB 422
13 Clear to Send B DCE CB 422
14 Transmitted Data B DTE BA 422
15 Transmit Signal Ele-
ment Timing
A DCE DB 422
16 Received Data B DCE BB 422
17 Receiver Signal
Element Timing
A DCE DD 422
18 Local Loopback N/A DTE LL 423
19 Request to Send B DTE CA 422
20 DTE Ready A DTE CD 422
21 Remote Loopback N/A DTE RL 423
22 DCE Ready B DCE CC 422
23 DTE Ready B DTE CD 422
24 Transmit Signal
Element Timing
ADTEDA 422
25 Test Mode N/A DCE TM 423
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