Installation manual

T1 CSU and T1 DSU/CSU Interface Connectors
B-73000-A2-GA31-F0 March 2001
RS-449 Port Interface Connector
The RS-449 Port Interface connector and adapter cable
information is shown in Figure B-8 and Table B-6.
1
2
14
3
16
15
12
17
9
4
19
5
13
20
8
10
6
7
21
18
23
24
11
25
22
1
4
22
6
24
5
23
8
26
7
25
9
27
12
13
31
11
19
14
10
20
17
35
18
29
30
Shield
TD-A
TD-B
RD-A
RD-B
TXC-A
TXC-B
RXC-A
RXC-B
RTS-A
RTS-B
CTS-A
CTS-B
DTR
RLSD-A
RLSD-B
DSR
Sig. Common
RL
LL
Rcv. Common
TT-A
TT-B
TM
Sig. Common
Shield
TD-A
TD-B
RD-A
RD-B
TXC-A
TXC-B
RXC-A
RXC-B
RTS-A
RTS-B
CTS-A
CTS-B
DTR-A
RR-A
RR-B
DM-A
Sig. Common
RL
LL
Rcv. Common
TT-A
TT-B
TM
DM-B
DTR-B
530
Signal
DB-25
Plug
DB-37
Socket
449
Signal
496-14323a
Figure B-8. EIA-530-A to RS-449 Adapter Cable
Table B-6
RS-449 Port Interface Connector
Signal
Circuit
Label
ITU #
To/
From
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