Avaya S8700 - ATM-DCH (ATM D-Channel Port)

ATM-DCH (ATM D-Channel Port)
Issue 1 May 2002
8-183555-233-143
ATM-DCH (ATM D-Channel Port)
NOTE:
TN230x circuit packs are not interchangeable. Always replace an ATM
circuit pack with the same type.
This MO (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:
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. 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)’’
■ ‘‘PKT-BUS (Packet Bus)’’
MO’s Name (in
Alarm Log) Alarm Level
Initial System Technician
Command to Run
1
1. pp is administered as a port in the range of 9 through 32.
Full Name of MO
ATM-DCH
2
2. For additional related information, see ‘‘ATM-TRK (Circuit Emulation Service Circuit Pack)’’.
MINOR test port UUCSSpp l ATM D-Channel
ATM-DCH WARNING test port UUCSSpp sh ATM D-Channel