Polycom IP 600 Guía Del Usuario

27

No Dial-Tone
Verify power is correctly applied to the 
SoundPoint

®

 IP 600/601 SIP 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 inline powering, check that 

the switch is supplying power to the 
phone (contact your System Adminis-
trator).

Verify if dial tone is present on any other 
audio paths:

•  Switch between handset, headset (if 

present) or hands-free to see if dial 
tone is present on these other paths.

•  If dial tone exists on one of these, 

connect a different handset or head-
set to isolate the problem.

No Display, Incorrect Display, or Bad Contrast

Verify power is correctly applied to the 
SoundPoint

®

 IP 600/601 SIP phone:

•  As “No Dial-Tone” above.

Verify contrast adjustment:

•  Follow the instructions in this User 

Guide to readjust the contrast to a 
darker level.

•  Reboot the phone to obtain a default 

level of contrast (follow the instruc-
tions in this User Guide).

Verify successful outbound or inbound 
calling:

•  Place a call to the phone under in-

vestigation - check that the display 
indicates incoming call information.

•  Lift the handset.  Ensure dial tone is 

present and place a call to another 
extension or number, check that the 
display changes in response.

Busy Lamp Field

The Busy Lamp Field (BLF) feature allows 
monitoring of the hook status and remote party 
information of users through the busy lamp fields 
and displays on an attendant console phone.