Functional description 385
•perform activation and deactivation of DSLs
•provide loopback control of DSLs
Each U interface providestwo B-channels and one D-Channel and suppor ts
one physical termination. This termination may be to a Network Termination
(NT1) or directly to a single U interface terminal. Normally this physical
termination is to an NT1, which provides an S/T interface that allows up to 8
physical terminals to be connected. The length of a DSL depends on the
specific terminal configuration and the DSL wire gauge, however,it should
not exceed 5.5 km (3.3 mi).
The main functions of the UILC are:
•provide eight ISDN U interfaces conforming to ANSI standards
•support point-to-point DSL terminal connections
•provide channel mapping between ISDN BRI format (2B+D) and
Meridian 1 bus format
•multiplex 4 D-channels onto one timeslot
•perform activation and deactivation of DSLs
•provide loopback control of DSLs
Each U interface provides twoB-channels and one D-channel and suppor ts
one physical termination. This termination can be to a Network Termination
(NT1) or directly to a single U interface terminal. Usually, this physical
termination is to an NT1, which provides an S/T interface that supports up
to eight physical terminal connections. The length of a DSL depends on the
specific terminal configuration and the DSL wire gauge; however,it should
not exceed 5.5 km (3.3 mi).
The main functions of the UILC are as follows:
•provide eight ISDN U interfaces conforming to ANSI standards
•support point-to-point DSL terminal connections
•provide channel mapping between ISDN BRI format (2B+D) and CS
1000 bus format
•multiplex four D-channels onto one timeslot
•perform activation and deactivation of DSLs
•provide loopback control of DSLs
Micro Controller Unit (MCU)
The Micro Controller Unit (MCU) coordinates and controls the operation of
the UILC. It has internal memory, a reset and sanity timer, a serial control
interface, a maintenance signalingchannel, and a digital pad.
Nortel Communication Server 1000
Circuit Card Reference
NN43001-311 01.04 Standard
Release 5.0 23May 2008
Copyright© 2003-2008, Nor tel Networks
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