User`s guide
9.6.2. Power up
No tone on power up
Check the power adaptor and power source, and restart the phone.
No dial tone on power up
The SIP phone takes time to exchange information with DHCP and SIP proxy servers.
During this time it will play
call progress tone
. Then the tone will change to
dial tone
if
the exchange is successful or to
error tone
if it is failure. Wait for the tone to change to
dial
or
error tone
.
Plays error tone on power up
It means that the information exchange with DHCP or SIP proxy server has failed.
Check if you have a network connection and DHCP and SIP proxy servers are running.
Also, check if the SIP phone is configured properly. Restart the phone and check it.
9.6.3. Making a call
The SIP phone powered up properly but plays error tone while making call
Check the network connection and default gateway to ensure they’re working properly.
Plays call progress tone
SIP phone plays call progress tone while trying to establish call and it can take time. If
it takes long time check if the SIP proxy server is running properly.
Plays error tone
The called party may not be registered with the proxy server.
Plays error tone after a long time
The proxy server may not be running and the SIP phone times out before playing error
tone. It can take some time.
Voice quality is not good
The SIP phone supports packet loss and network jitter to some extent. Above these
levels, the quality can be bad. The G.729 codec will have better performance over the
G.711 codec and it can be selected in the configuration.
Call hold does not work properly
The call-hold feature requires co-operation from both ends. The behavior is not defined
if the other phone does not support the hold feature.
Speakerphone does not work
The SIP phone has a speaker to support one-touch dialing, not for a speakerphone. The
other party will hear you if you are in speaker mode but the voice quality may not be
good.
9.6.4. Browser access
No response through browser
Check whether the SIP phone is connected to the network and you have the correct IP
address of the phone.
To access the SIP phone if the IP address is unknown
Select the factory-default option and restart the phone. Now the phone will use factory
default parameters and uses a known IP address.
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