User Manual

Demand Assignment
System Overview GSI 005
605-0000-450
Draft Issue 1.3dr Date 8/02/00
Page 5 of 6
Figure 23. The B Series Service Interface Unit. (MU-I shown).
11.5. The L Series Subscriber Terminals
The L series Subscriber Terminals are designed for Data and use an external antenna
and an internal Modular Service Interface Unit. The STs are powered from the AC
mains supply.
Service Interface Unit
Socket PSU
Internal Components
L128 1x 128k data lines
L64 1 x 64k data lines
L2 x64 2x 64k data lines
Antenna / RF
IF Drop Cable
External Components
MU-L128 1x 128k data lines
MU-L64 1 x 64k data lines
MU-L2 x64 2x 64k data lines
Figure 24. L Series Demand Assigned Subscriber Terminals
The ST-L128 supports a 128kbit/s serial data transmission operates in Fixed Assigned
mode. The Service Interface Unit is a MU-D128 with a 25 way D-Type socket interface
(RS530).
The ST-L64 supports a 64kbit/s serial data transmission operates in Fixed Assigned
mode. The Service Interface Unit is a MU-D64 with a 25 way D-Type socket interface
(RS530).