dd-on modules for system expansions
Overview of modules
A31003-K16-X001-3-7620
,
07/99
3-18
Hicom 100 E Version 2.1, Service manual
3.5.4 STLS (subscriber trunk line S
0
)
The STLS4 module has 4 S
0
ports. The ports can be operated either as external trunk interfac-
es in subscriber unit mode or as an internal S
0
interface (PMP bus) in network terminal (NT)
mode (with cross-connected RX TX lines) (see Figure 5-6).
STLS2 is a subequipped version with 2 S
0
ports.
This module is also required for using the digital modem in the MB.
Figure 3-8 STLS interfaces
Figure 3-9 Contact assignment of the S
0
Mini Western socket
No
provision is made for supplying power to mains-powered terminal devices.
Devices of this type must be powered locally, e.g. using a plug-in mains adapter or
bus PSU.
X1
50
2
to MB
X2
STLS
1
2
3
4
not for STLS2
S
0
ports
Mini Western
2 = SX +
3 = SR +
4 = SR -
5 = SX -
SX = signal transmit
SR = signal receive
6 5 4 3 2 1
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