
Remote Annex 4000 Hardware Installation Guide
Appendix B Cables and Connectors
B-12
PBX Loopback
Connector
The 50-pin male (90
°
) PBX loopback connector loops the following
signals: Transmit and Receive; RTS and CTS; and DTR, DCD, and
DSR.
shows the PBX loopback connector’s
pin/signal allocations.
Table B-7. PBX Loopback Connector Wiring
Pin Number
Remote Annex
4000 Signal
Connects to Pin
Number
Signal
26
RXD1
27
TXD1
4
RTS1
29
CTS1
28
DTR1
1, 3
DCD1, DSR1
30
RXD2
31
TXD2
8
RTS2
33
CTS2
32
DTR2
5, 7
DCD2, DSR2
34
RXD3
35
TXD3
12
RTS3
37
CTS3
36
DTR3
9, 11
DCD3, DSR3
38
RXD4
39
TXD4
16
RTS4
41
CTS4
40
DTR4
13, 15
DCD4, DSR4
42
RXD5
43
TXD5
20
RTS5
45
CTS5
44
DTR5
17, 19
DCD5, DSR5
46
RXD6
47
TXD6
24
RTS6
49
CTS6
48
DTR6
21, 23
DCD6, DSR6
Summary of Contents for Remote Annex 4000
Page 1: ...Part No 166 024 151 Rev C March 1996 Hardware Installation Guide Remote Annex 4000 ...
Page 4: ...Remote Annex 4000 Hardware Installation Guide Revision Level History iv ...
Page 8: ...Remote Annex 4000 Hardware Installation Guide Contents viii ...
Page 10: ...Remote Annex 4000 Hardware Installation Guide Figures x ...
Page 12: ...Remote Annex 4000 Hardware Installation Guide Tables xii ...
Page 16: ...Remote Annex 4000 Hardware Installation Guide Preface xvi ...
Page 71: ...2 33 Remote Annex 4000 Hardware Installation Guide Chapter 2 Installing the Remote Annex 4000 ...
Page 72: ...Remote Annex 4000 Hardware Installation Guide Chapter 2 Installing the Remote Annex 4000 2 34 ...