Nortel DMS-100 Series Maintenance Manual page 37

Six-host-links configuration
The figure below shows the channel availability for an RLCM with six DS-1
host links balanced evenly between LCC 0 and LCC 1. Each primary port
of an LCM provides an interface between 30 DS30A channels making 120
channels available for each LCM. Port 6 is used for intershelf connections
or interswitched calls. Port 6 of each LCM provides an interface between 30
interchannels.
Channel availability with six host DS-1 links
DS30A links from
LCM 0 controller ports
0 1 2 3 4 5 6 7
LCC 0
transmitter
Host links
3 X 24 = 72
channels
Interchannels
18
Host links
3 X 24 = 72
channels
LCC 0
receiver
0 1 2 3 4 5 6 7
DS30A links to
LCM 0 controller ports
In this configuration, the channel distribution is as follows:
144 host channels: 24 host channels are provided for each equipped port
of the LCM. An equipped port of an LCM has a corresponding DS-1
link that provides an interface with the LCC.
36 intrachannels: Six intrachannels are provided at the LCM for each
equipped LCM port, or 18 interchannels for each LCM.
60 interchannels: 30 interchannels are provided from port 6 of each
LCM. Fifteen channels of each port are for intercalling and 15 channels
are image channels.
DMS-100 Family RLCM Maintenance Manual XPM12 and up
RMM
Interchannels
30
RMM
Maintenance overview 1-21
DS30A links from
LCM 0 controller ports
7 6 5 4 3 2 1 0
LCC 1
transmitter
Host links
3 X 24 = 72
channels
30
Interchannels
18
Host links
3 X 24 = 72
channels
LCC 1
receiver
7 6 5 4 3 2 1 0
DS30A links to
LCM 0 controller ports