Avaya S8700 - Page 994

Maintenance-Object Repair Procedures
555-233-143
8-272 Issue 1 May 2002
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. Table 8-114
lists the possibilities for various DEFINITY ECS models.
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. Table 8-115 lists the possible
trunk-group capacities.
Table 8-114. Circuit and channel capacities, for each DEFINITY model
Model Ports
Emulated
circuits
(signaling
groups) Channels/circuit
Virtual
D channels
Virtual
Bchannels
R6csi 248 1 to 8 24 (T1), 31 (E1) 1–8 6–240
R6si 248 1 to 8 24 (T1), 31 (E1) 1–8 6–240
R6r 248 1 to 8 24 (T1), 31 (E1) 1–86–240
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Table 8-115. ATM CES capacities by DEFINITY model
Model
Ports per
trunk group
(max)
Trunk groups per
switch (max)
Trunks per
switch (max)
R6csi 99 99 400
R6si 99 99 400
R6r 255 666 400
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