DEFINITY Enterprise Communications Server Release 7
Maintenance for R7r
555-230-126
Issue 4
June 1999
Maintenance Object Repair Procedures
9-255ATM-TRK (Circuit Emulation Service Circuit Pack)
9
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 9-112
lists the possibilities for various G3V4 models.
Table 9-111. R7 ATM-TRK circuit packs
Circuit pack Channel types Interface Fiber
Echo
cancellation
TN2305 B and D
channels
24 or 32
channel
Multi mode Y
TN2306 B and D
channels
24 or 32
channel
Single mode Y
Continued on next page
Table 9-112. Circuit and channel capacities, for each DEFINITY model
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
R6si 248 1 to 8 24 (T1), 31 (E1) 1-8 6-240
R6r 248 1 to 8 24 (T1), 31 (E1) 1-8 6-240
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