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COMSPHERE 3000 Series Carrier
B-12 December 1994 3000-A2-GA31-80
RS449 Port Interface Connector
The RS449 Port Interface connector information is
shown in Table B-6 and Figure B-9.
Table B-6
RS449 Port Interface Connector
Signal
Circuit
Mnemonic
CCITT
Number
Direction Pin
Shield 1
Signal Ground SG 102A 19
Receive Ground RC 102B 20
Send Common SC 37
Send Data SD 103 To DCE 4 (A)
22 (B)
Receive Data RD 104 From DCE 6 (A)
24 (B)
Request to Send RS 105 To DCE 7 (A)
25 (B)
Clear to Send CS 106 From DCE 9 (A)
27 (B)
Receiver Ready RR 109 From DCE 13 (A)
31 (B)
Data Mode DM 107 From DCE 11 (A)
29 (B)
Terminal Ready TR 108/1, /2 To DCE 12 (A)
30 (B)
Terminal Timing TT 113 To DCE 17 (A)
35 (B)
Send Timing ST 114 From DCE 5 (A)
23 (B)
Receive Timing RT 115 From DCE 8 (A)
26 (B)
Local Loopback LL 141 To DCE 10
Remote Loopback RL 140 To DCE 14
Test Mode TM 142 From DCE 18