Nortel Networks Passport 7420 - Manual (Page 37)

37
General information
Troubleshooting
The telephone freezes.
Remove and replace the battery pack.
Press
to turn on the telephone.
The telephone does not ring.
Check whether the ringer is SILENT
or RINGER VOL. is OFF.
Not possible to turn on the
telephone.
Check if battery is connected. If yes,
charge the battery.
The telephone turn off when
receiving a call and going off-hook.
Charge the battery. If still a problem
change the battery as it might be
defective.
Information
Error information
Improper function of the handset
might be related to the installation of
the DMC system or failures related to
the main system.
Before declaring a handset for repair
be sure that the main system is oper-
ating properly.
Technical specification
Size and weight
Size: 143 x 48 x 26 mm
Weight: 121 g incl. battery ± 10 g
Capacity
Active talking time 12 hours
Stand-by time 120 hours