User Manual

Demand Assignment
System Overview GSI 002
605-0000-450
Draft Issue 1.3dr Date 8/02/00
Page 11 of 16
4. Subscriber Terminals
The AS4000 Subscriber Terminal (ST) portfolio includes subscriber terminal types: for
Voice, Data, and ISDN. In general, the customer has access to the same range of
facilities that are supported by a conventional copper pair.
For normal telephony services, these could typically include:
• multi-frequency or loop-disconnect dialling
• subscriber private metering
• intrusion tone
• malicious call interception.
• caller line identification
Note. Line reversal is not supported.
All tones, tone cadences and announcements which are generated by the Local
Exchange are passed transparently over the AS4000 System. Line feed voltage, ringing
current and ringing cadence are generated by the ST equipment.
The Customer Premises Equipment is connected to the Line Sockets on the internal
Service Interface Unit.
The specific impedance of the NTU allows tests to be performed by the SIU to detect
any attached CPE.
For Data one 128kbit/s or two 64kbit/s circuits are supported in Fixed Assigned mode
only.
For ISDN 2B+D channel S-bus interface in Fixed Assigned mode only.