![Inventec 2509 User Manual Download Page 53](http://html.mh-extra.com/html/inventec/2509/2509_user-manual_2083832053.webp)
Confidential Information. All Rights reserved by Inventec Multimedia & Telecom Corp.
Call Waiting Timer: This is a special system parameter and
please don’t modify the default value of this item unless
requested by your service provider.
End of Dial Key: This is a special system parameter and please
don’t modify the default value of this item unless requested by
your service provider.
DTMF Type: This is a special system parameter and please
don’t modify the default value of this item unless requested by
your service provider.
RFC2833 Payload Type for DTMF: This is a special system
parameter and please don’t modify the default value of this item
unless requested by your service provider.
Handset Volume: You can set the volume level of handset’s
microphone and speaker here. Please input an integer between
0 to 8 in each field (total 9 levels), higher number means louder
voice.
Handsfree Volume: In here you can set the volume level of
speakerphone’s microphone and speaker. Please input an
integer between 0 to 8 in each field (total 9 levels), higher
number means louder voice.
Headset Volume: In here you can set the volume level of
headset’s microphone and earphone. Please input an integer
between 0 to 8 in each field (total 9 levels), higher number
means louder voice.