ZyXEL Communications Multi-service Access Platform MSAP2000 - Manual (Page 172)

7. Product Specification
MSAP2000 Technical Manual V3.0 7-65
7.23. ISDN U Interface Line Terminal Module (ISDN-U LULT)
Overview
The ISDN U Interface Line Terminal Module (LULT) provides functions
similar to the LUNT Module. LUNT serves as a Master Digital
Subscriber Line Emission Device, and it is installed in the RT to
support signal conversion for MSAP2000’s RT trunk interface signals,
and 2B1Q DSL signals. Together with the LUNT Module in the COT,
LULT can provide ISDN service to cover extended distances.
Features
And
Benefits
„ Panel LEDS indicate status, faults, alarms, and network
connections.
„ Loop status detection and Signaling exchange
„ Complies with ETSI ETR080, and Chunghwa Telecom’s ME
0200-2 Standards.
„ Alarm and Fault monitoring and reporting
„ Provides Loop current for Remote NT1
„ Timeslot assignment for Voice Services
„ Use of non-volatile memory devices for performance data storage
Function Diagram
Application
LULT is used to provide ISDN service to subscribers. It can work with
LULT at COT or work with V5 interface for voice only solution.