ADTRAN 25 manual Virtual Facilities Troubles

MAINTENANCE

P r o c e d u r e s :

1.Make sure that the appropriate ZTN79 CP is translated.

2. Check for the presence of -48 volts at test point on front of cabinet.

Symptoms:

Inoperative display-equipped voice terminal when LOCAL button is used.

Procedures:

1.If LOCAL button/lamp is off, and voice terminal is inoperative, activate LOCAL button.

2. If terminal is still inoperative, check for other problems.

Virtual Facilities Troubles

Refer to Figure 4-12for assistance in clearing virtual facilities troubles.

4-85