![Inventec 2509 User Manual Download Page 54](http://html.mh-extra.com/html/inventec/2509/2509_user-manual_2083832054.webp)
Confidential Information. All Rights reserved by Inventec Multimedia & Telecom Corp.
Ring Volume: In here you can set the volume level of ringer,
please input an integer between 0 to 10.
Silence Suppression: This function will cause the IP Phone not
to transfer data when there’s no voice detected from
microphone. If the network connection you’re using is heavily
loaded, please set to ‘Enable’, but you may found that the
quality of voice is worse. You can set to ‘Disable’ to get better
voice quality.
Ring Tone Type: You can select the type of ringtone here. There
are several ringtones available here, please pick your favorite
one!
Voice Codec: Please ask your service provider for proper
setting. If you don’t know what it is, leave it alone.
Forward Timer: This is a special system parameter and please
don’t modify the default value of this item unless required by
your service provider.
Do Not Disturb: You can enable or disable DND function here.
Set Time Zone: Please select a proper timezone setting
according to the timezone of your residence.
NTP Server Address: This IP Phone can adjust the time of
internal clock via network, and you have to set a valid NTP
server address here. Some NTP Server addresses are:
time.nist.gov
poo.ntp.org