Coastcom D/I Mux III System User Manual

Chapter 3. Installation
84
Line Interface Units
The Line Interface Units (LIUs) give the D/I Mux III Channel Bank, Drop-and-Insert, and Dual
Channel Bank (DCB) capabilities when used in conjunction with the CCU/AMCU. The LIUs
select T1 line coding, framing, and alarm options. Select the options through software whenever
possible. Use the LIU switches when a control terminal is not available.
See Tables 3-7 and 3-8 for lists of LIU front panel LED indicators and DIP switches.
Table 3-7. LIU LED Indicators
P/N 30309-104A and 30309-114A
Front
Panel
Label
LED Color Description
LOC Red Local alarm, T1 framing or input signal lost
YEL Yellow Remote alarm, T1 remote alarm received
CGA Yellow Carrier Group Alarm, carrier taken off-line
FRM Red Receiving framing errors
B7 Green Bit 7 stuffing selected
BPV Yellow Receiving excessive Bipolar Violations
0-DEN Red Receiving more than 32 consecutive zeros
AIS Red Receiving unframed all ones
RX Red Network loop code Received
TX Yellow Network loop code Transmitted

Coastcom D/I Mux III System Specifications

General

Brand	Coastcom
Model	D/I Mux III System
Category	Multiplexer
Language	English