Nortel DMS-100 Series Maintenance Manual page 20

1-4 Maintenance overview
The SMS configuration
Shelf 0
A maximum of four ports for each plane
DS30 interface
Plane 0
128 channels
Formatter
plane select
CSM
P
P
Ring/pad
Time switch
320
channels
DS-1 interface
5 cards with
2 ports for each
card
DS-1 port assignments
The network attaches to the SMS with a maximum of four pairs of DS30
links. These links connect in the SMS to two DS30 interface cards
(NT6X40), one in shelf 0 and one in shelf 1. Each card supplies four DS30
ports, and provides a maximum of eight ports on a fully equipped SMS.
Plane 0 to plane 1 both have four dedicated ports. The system distributes
port assignments to the two DS30 cards. Plane 0 receives even-numbered
links. Plane 1 receives odd-numbered links. A minimum of three ports for
each SMS, three pairs of duplicated links, are required for interface with the
network module.
297-8231-550 Standard 09.01 August 1998
128 internal
service
channels
640-channel
parallel speech
bus
Control
complex 0
320
channels
Shelf 1
A maximum of four ports for each plane
DS30 interface
Plane 1
128 channels
128 internal Formatter
plane select
service
channels
640-channel
parallel speech
bus
Control
complex 1
Ring/pad
Time switch
320
channels
DS-1 interface
5 cards with
2 ports for each
card
DS-1 port assignments
CSM
P
P
320
channels