Polycom IP 501 SIP ユーザーズマニュアル

19

No Dial-Tone

Verify power is correctly applied to the 
SoundPoint

®

 IP 500/501 SIP phone:

•  Check that the display is illumi-

nated.

•  Make sure the LAN cable is insert-

ed 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 
Administrator).

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 500/501 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 
instructions 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 informa-
tion.

•  Lift the handset.  Ensure dial tone 

is present and place a call to anoth-
er extension or number.  Check that 
the display changes in response.

No Ringing

Verify incoming ring setting and volume 
level:

•  Adjust the ringing level from the 

front panel using the volume up/
down keys.

•  Check same status of handset, 

headset (if connected) and through 
the hands-free speakerphone.

Verify successful outbound or inbound 
calling:

•  As “No Display” above.

No Audio on Headset

Verify correct connections:

•  Ensure the headset is plugged into 

the jack marked 

Headset at the rear 

of the phone.

•  Ensure the headset amplifier (if 

present) is turned on and/or the 
volume is correctly adjusted.