DEFINITY Enterprise Communications Server Release 7
Maintenance for R7r
555-230-126 Issue 4
June 1999
Maintenance Object Repair Procedures
9-162ATM-DCH (ATM D-Channel Port)
9
ATM-DCH (ATM D-Channel Port)
NOTE:
TN230x circuit packs are not interc hangeable. Always replac e an ATM
circuit pack with th e same type.
This MO (ATM-DCH) utilizes the existing ISDN-PLK or D-channel maintenance
strategy with modifications. The ATM circuit pac k can be administered fo r up to 8
Circuit Emulation Service (CES) or signaling groups, ea ch with its own
D-channel, as opposed to one D-channel for an entire DS1 circuit p ack.
NOTE:
Due to the dual personalities and the number of D channels the ATM board
can possess, the in-line errors and signaling port LAN loop back test have
been moved to the maintenanc e object ATM-TRK. When an in-line error is
sent due to PACKET BUS errors, the ATM circuit pac k maintenance object
receives the error, not ATM-DCH.
The D-channel ISDN-PRI interface, which is emulated for ATM-CES, uses
out-of-band signaling to transmit control messages b etween two endpoints. User
information or bearer channels (B-c hannels) carry digitiz ed voice and dig ital
data and are assigned to DS1 ISDN trunks or PRI endpoints. Call control
signaling for the B-chan nels is combined and carried over the separa te
ISDN-PRI Signaling Link Port D-channel.
Problems with ATM-DCH affects all of the associated B-channels, since c all
control signaling cannot reach the far-end switch or terminal adapter. Stable
calls may remain operational, b ut no new calls can be mad e. ATM-DCH in turn
depends on the TN230X ATM Trunk circuit pack it resides on and the p acket bus
which provides the link to the p rocessor.
When working ATM-DCH alarms or errors, also investigate
■‘‘ATM-TRK (Circuit Emulation Service Circuit Pack)’’
■PKT-BUS
MO Name (in
Alarm Log) Alarm Level Initial System Technician
Command to Run1
1. pp is administered as a port in the range of 9 through 32.
Full Name of MO
ATM-DCH2
2. For additional related information, see ‘‘ATM-TRK (Circuit Emulat ion Service Circuit Pack)’’.
MINOR test port
UUCSSpp
l ATM D-Channel
ATM-DCH WARNING test port
UUCSSpp
sh ATM D-Channel