Instruction manual

CLASS: Calling Number and Name Delivery Page 1105 of 3156
Features and Services
Figure 30
A Meridian 1 system with a two-group network
Note that traffic to a CLASS set can be originated from a non-CLASS set,
another CLASS set or an incoming trunk. Since trunks have more traffic
impact on junctor blocking, they are used to illustrate the feature operation,
however, both sets and trunks can be traffic sources to CLASS sets.
The maximum size Meridian 1 comprises of 5 network groups. Each group
has 32 loops of which 28 can be terminal loops, the rest are service loops
(TDS loops for tones, conference and music).
From Group 0 to Group 1, as shown in Figure 30, there are 8 one-way
junctors. Similarly, there are another 8 one way junctors from Group 1 to
Group 0. For practical purposes, they can be treated as 8 two-way junctors. A
two-way path is equal to a voice channel. A junctor has 30 voice traffic
channels as on a loop. Each two-way channel represents a conversation path.
A channel is also used to deliver the CND from the CMOD to a CLASS set.
553-7395.EPS
CMOD CMOD
Group 0 Group 1
1
28
1
Terminal LoopsTerminal Loops
BA
28
Inter-group
Junctors
8 x 30 channels
8