Maintenance Messages; Maintenance Testing - Nortel Meridian 1 Option 11C Manual

Page 124 of 126

Maintenance messages

Maintenance testing

553-3011-315 Standard 13.00
ISL Implementation and Maintenance
ENL SERV N
DIS SERV N
D-channel status and error conditions are reported as DCH messages. These
messages can be found in the System Messages (553-3001-411)
ISL back to back testing (without modems)
For maintenance reasons or testing purposes it is sometimes necessary to
connect ISL back to back (without modems). This connection is normally
done within the same Meridian 1 system in a lab environment.
Hardware requirements:
A 25-pin female-to-female gender changer is required to connect the
NTAK19BA cable back-to-back. The gender changer is not supplied with the
Option 11C system. Figure 17 illustrates the connection.
Note: Protocol converters AO378652 and AO381016 supplied with the
system are not gender changers.
Figure 17
ISL back-to-back connection
NTAK02
January 2002
Enable service messages for DCHI N
Disable service messages for DCHI N
Port 1, DCHI Y
25 pin female-to-female
Gender changer
NTAK19BA custom cable
Port 3, DCHI X