Nortel DMS-100 Series Maintenance Manual page 39

Channel availability with four host DS-1 links
DS30A links from
LCM 0 controller ports
0 1 2 3 4 5 6 7
LCC 0
transmitter
Host links
2 X 24 = 48
channels
Interchannels
18 + 24
Host links
2 X 24 = 48
channels
LCC 0
receiver
0 1 2 3 4 5 6 7
DS30A links to
LCM 0 controller ports
Three-host-links configuration
With three host links, the number of intraswitching channels for LCC 1
increases by 24. The 24 channels are from the unequipped DS-1 port. This
causes unbalanced traffic capacities in the RLCM. Because the number of
channels for each LCC is unbalanced, blocking may occur if subscribers are
evenly distributed on the LCM units. LCC 1 has a greater capacity to switch
intrachannel calls than LCC 0. The figure below shows the configuration of
available channels an RLCM with three host links.
DMS-100 Family RLCM Maintenance Manual XPM12 and up
RMM
Interchannels
30
RMM
Maintenance overview 1-23
DS30A links from
LCM 0 controller ports
7 6 5 4 3 2 1 0
LCC 1
transmitter
Host links
2 X 24 = 48
channels
30
Interchannels
18 + 24
Host links
2 X 24 = 48
channels
LCC 1
receiver
7 6 5 4 3 2 1 0
DS30A links to
LCM 0 controller ports