Polycom CX700 - Manual (Page 52)

User Guide Polycom CX700 IP Phone
4 - 6
Making and Receiving Calls
Symptom Problem Corrective Action
There is no dial tone. Power is not correctly applied to
the Polycom CX700 IP phone. Do one of the following steps:
• 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 in-line powering, have your
system administrator check that the
switch is supplying power to the
phone.
Dial tone is not present on one of
audio paths. Do one of the following steps:
• Switch between handset, headset (if
present) or speakerphone to see if dial
tone is present on other paths.
• If dial tone exists on another path,
connect a different handset or
headset to isolate the problem.
• Verify that the phone is logged in and
registered with Microsoft Office
Communication Server 2007.