General DataComm SpectraComm SRM-6 Installation & Operation Manual page 23

Installation and Setup
Rear Panel DTE Port
(Interface "B" in
The SRM-6 and the modem/DSU provide a rear panel DB25 aggregate port connection between
those two devices. The table below describes the pinouts.
• For an aggregate rate of 56K or 64Kbps, channel rates can be 2.4K, 4.8K, 9.6K, or 19.2Kbps,
synchronous or asynchronous.
• For an aggregate rate of 19.2Kbps, channel rates can be 1.2K, 2.4K, 4.8K, or 9.6Kbps,
synchronous or asynchronous.
• For an aggregate rate of 28.8 or 33.6Kbps, channel rates can be 1.2K, 2.4K, 4.8K, 9.6K or
19.2Kbps, synchronous or asynchronous.
Table 2-5
Wired DTE Port Pinouts
RS-232 Interface Port
Pin No.
2
3
4
5
6
7
8
15
17
20
24
076R176-000
Issue 1
Figure 2-2)
RS-530 Interface Port
Signal Pin No.
SD 2
RD 14
RTS 3
CTS 16
DSR 4
SGND 19
DCD 5
ST 13
RT 6
DTR 22
TT 7
8
10
15
12
17
9
20
23
24
11
SC SRM-6 Multiplexer
Installation & Operation Manual
Signal
SDa
SDb
RDa
RDb
RTSa
RTSb
CTSa
CTSb
DSRa
DSRb
SGND
DCDa
DCDb
STa
STb
RTa
RTb
DTRa
DTRb
TTa
TTb
2-7