Avaya S8700 Maintenance Manual page 994

Maintenance-Object Repair Procedures
NOTE:
TN230x circuit packs are not interchangeable.
ATM Circuit Emulation Service
Under ATM Circuit Emulation Service (CES), you simulate ISDN-PRI circuits by
assigning ports to signaling groups. Each signaling group represents a PRI
circuit, and the ports in the group represent the D channel and B channels of that
circuit. TN230x circuit packs support up to 248 ports per circuit pack.
Virtual D channels. Non-facility associated signaling is not supported under
ATM-CES, so you must reserve one port in each signaling group for use as a
D channel (channel 24 when emulating a T-1 ISDN facility, channel 16 when
emulating an E-1 facility). The D channel can be any physical port from 9 to 32.
Virtual circuits. The TN230x can support a varied number of virtual circuits,
depending on the switch and the administration of the circuit pack.
lists the possibilities for various DEFINITY ECS models.
Table 8-114. Circuit and channel capacities, for each DEFINITY model
Model
R6csi
R6si
R6r
Virtual trunk groups. You cannot bundle physical DS1 ISDN-PRI circuits and
virtual ATM-CES circuits into the same trunk groups. Virtual circuits can only be
assigned to all-virtual, all-ATM trunk groups.
trunk-group capacities.
Table 8-115. ATM CES capacities by DEFINITY model
Ports per
trunk group
Model (max)
R6csi 99
R6si 99
R6r 255
8-272 Issue 1 May 2002
Emulated
circuits
(signaling
Ports groups)
248 1 to 8
248 1 to 8
248 1 to 8
Trunk groups per
switch (max)
99
99
666
Virtual
Channels/circuit D channels
24 (T1), 31 (E1) 1–8
24 (T1), 31 (E1) 1–8
24 (T1), 31 (E1) 1–8
Continued on next page
Table 8-115 lists the possible
Trunks per
switch (max)
400
400
400
Continued on next page
Table 8-114
Virtual
B channels
6–240
6–240
6–240
555-233-143