Symptom: no power to phone
1. Verify that patch cable (Cat 5 or Cat 6) is connected to the
network port on the phone and not the PC port.
2. Verify that the phone is connected to a working phone jack
(VLAN 130 or VLAN 140). At some schools
phone jacks were labeled with a "UC" decal.
3. If the "UC" jack does not power the phone on, replace
the patch cable with a known working patch cable and connect it to a known
working phone jack at another location. (replacing a working phone is the easiest way to do this).
4. If the phone still does not power on please forward me the
phone's serial number, directory number, and user's name.
Symptom: unable to consistently hear caller
1. Verify that the mute button is not on or the volume is at a low
setting
2. Replace the handset with a known working handset.
3. Perform a factory reset: https://supportforums.cisco.com/discussion/12323706/cisco-7841-phone-factory-reset-using-keypad
4. If the user is still not able to hear callers please forward me
the phone's serial number, directory number, and user's name.
Symptom: endless phone registration cycle
1. If the phone powers on but does not fully register, attempt to reset the handset to the factory default: https://supportforums.cisco.com/discussion/12323706/cisco-7841-phone-factory-reset-using-keypad.
2. If the phone still does not register perform a factory reset on a known working phone port at a different location.
3. If the phone is still not able to fully register please forward
me the phone's serial number, directory number, and user's name.
Symptom: cannot access voice mail
1. Forward me the phone's serial number, directory number,
and user's name and I will reset the pin number.
2. The voicemail pin will be reset to 97531.
Symptom: the phone powers on and can receive calls but the display is off
1. Forward me the phone's
serial number, directory number, and user's name and I will request a replacement.
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