User Manual

AS4000 Subscriber Terminal
Installation and Commissioning
GSI 002
605-0000-454
Draft Issue 1.3 Date 8/02/00
Page 11 of 14
3.11 The B Series Subscriber Terminals
The N series Subscriber Terminals are designed for ISDN and use an external
antenna and an internal Modular Service Interface Unit. The STs are powered
from the AC mains supply.
Antenna / RF
IF Drop Cable
Service Interface Unit
Socket PSU
External Components
Internal Components
B1 2B+D ISDN line
Figure 9. B Series Demand Assigned Subscriber Terminals
The ST-B1 supports a basic rate ISDN, 2B+D (2 x 64kbit/s + 16kbit/s) “S”
interface, and operates in Fixed Assigned mode. The Service Interface Unit is a
MU-I with a RJ45 S bus interface.
Figure 10. The B Series Service Interface Unit. (MU-I shown).