Troubleshooting call issues, Troubleshooting call issues -4 – Polycom VVX 1500 C Business Media Phone for Cisco Unified Communications Manager (SIP) User Manual
Page 176
User Guide for the Polycom VVX 1500 C Business Media Phone for Cisco Unified Communications Manager (SIP)
5 - 4
Troubleshooting Call Issues
Symptom
Problem
Corrective Action
There is no dial tone.
Power is not correctly applied to
the phone.
•
Check that the display is illuminated.
•
Make sure the LAN cable is inserted
properly at the rear of the phone (try
unplugging and re-inserting the
cable).
•
If using Power over Ethernet (PoE),
have your system administrator check
that the switch is supplying power to
the phone.
Dial tone is not present on one of
the audio paths.
•
Switch between Handset, Headset (if
present) or Speakerphone modes to
see if the dial tone is present on other
paths.
•
If the dial tone exists on another path,
connect a different handset or
headset to isolate the problem.
The phone does not ring.
Ring volume is low.
While the phone is idle, adjust the ringing
level by pressing
or
.
Outbound or inbound calling is
unsuccessful.
•
Place a call to the phone under
investigation. Check that the display
indicates incoming call information.
•
Lift the handset. Ensure the dial tone
is present and place a call to another
extension or number. Check that the
display changes in response.
The phone has a Silent ring tone.
Choose a ring tone other than Silent. See
.