ATM-TRK (Circuit Emulation Service Circuit Pack)
Issue 5 October 2002
759
555-233-119
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 88
lists
the information for the Avaya Definity Server CSI.
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 89
lists the trunk-group
capacities for an Avaya Definity Server CSI.
Table 90
shows the ATM CES capacities for T1 and E1 circuits on the Avaya
Definity Server CSI.
LEDs
The ATM circuit pack LEDs give you a visual indication of the condition of the
TN230x circuit pack (
Table 91
).
Table 88.
Circuit and channel capacities for Avaya Definity Server CSI
Model
Ports
Emulated circuits
(signaling groups)
Channels/circuit
Virtual
D-channels
Virtual
B-channels
R6CSI
248
1 to 8
24 (T1), 31 (E1)
1-8
6-240
Table 89.
ATM CES capacities for Avaya Definity Server CSI
Model
Ports per trunk group (max)
Trunk groups per switch (max)
Trunks per switch (max)
R6csi 99
99
400
Table 90.
Ports available for trunking, for each ISDN facility type
Type
Channels per signaling
group (trunk)
Max. signaling groups
(trunks) per circuit pack
Max. available
ports
Reserved
ports
Total
ports
T1:
24
8
192
ports 1-8
256
E1:
31 8
248
ports
1-8
256