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Communication Manager Maintenance-Object Repair Procedures
522 Maintenance Procedures for Avaya Communication Manager 3.0, Media Gateways and Servers
ATM-DCH (ATM D-Channel Port)
S8700 | 8710 / S8500
Note:
Note: TN230x circuit packs are not interchangeable. Always replace an ATM circuit
pack with the same type.
ATM-DCH uses the existing ISDN-PLK or D-channel maintenance strategy with modifications.
The ATM circuit pack can be administered for up to 8 Circuit Emulation Service (CES) or
signaling groups, each with its own D channel, as opposed to one D channel for an entire DS1
circuit pack.
Note:
Note: Due to the dual personalities and the number of D channels that the ATM board
can possess, the in-line errors and signaling port LAN loopback test has been
moved to the MO ATM-TRK (Circuit Emulation Service Circuit Pack)
on
page 617. When an in-line error is sent due to packet-bus errors, the ATM circuit
pack MO receives the error, not ATM-DCH.
The D-channel ISDN-PRI interface is emulated for ATM-CES and uses out-of-band signaling to
transmit control messages between two endpoints. User information or bearer channels (B
channels) carry digitized voice and digital data and are assigned to DS1 ISDN trunks or PRI
endpoints. Call-control signaling for the B channels is combined and carried over the separate
ISDN-PRI Signaling Link port D channel.
Problems with ATM-DCH affects every associated B channel, since call-control signaling cannot
reach the far-end switch or terminal adapter. Stable calls can remain operational, but no new
calls can be made. In turn, ATM-DCH depends on the:
● TN230X ATM Trunk circuit pack where it resides
● Packet bus that provides the link to the processor
When working ATM-DCH alarms or errors, also investigate
● ATM-TRK (Circuit Emulation Service Circuit Pack) on page 617
● PKT-BUS (Packet Bus) on page 1790
MO Name in
Alarm Log
Alarm
Level
Initial Command to Run Full Name of MO
ATM-DCH MIN test port location l ATM D-Channel
ATM-DCH WRN test port location sh ATM D-Channel