User Guide

Grandstream Networks, Inc. GXP User Manual Page 31 of 44
Firmware 1.2.5.3 Last Updated: 03/2011
HEADSET Key Mode
Select either “Default mode” or “Toggle Speaker(default)/Headset” or “Toggle
Speaker/Headset(default)”.
In “Default Mode”, only the speakerphone will ring for an incoming call. User can
use the headset key to pick-up, speak, and hang up calls through headset. The
headset icon will appear on the LCD when a call is in progress.
If “Toggle Speaker/Headset(default)”is checked, only the headset will ring for an
incoming call.
If “Toggle Speaker(default)/Headset” is checked, only the speakerphone will ring for
an incoming call but the user can make the phone rings using the headset by
pressing the HEADSET key while phone is idle. The headset icon will appear on
the idle LCD screen.
NOTE: This is not available for GXP2000
PC Port Mode
For GXP1200/GXP280 only. Default is ‘Switch’. Choose to toggle between
Switch/Hub mode.
Advanced User configuration includes not only the end user configuration, but also advanced configuration
such as SIP configuration, Codec selection, NAT Traversal Setting and other miscellaneous configuration.
Table 15: Advanced Settings
Admin
Password
Administrator password. Only the administrator can access
the “Advanced
Settings” and “Account Settings”
page. Password field is purposely blank for
security reasons after clic
king update and saved. The maximum password
length is 25 characters.
G723 rate
Encoding rate for G723 codec. By default, 6.3kbps rate is set.
iLBC frame size
iLBC packet frame size. Default is 20ms. For Asterisk PBX, 30ms might be
required.
iLBC payload type
Payload type for iLBC. Default value is 97. The valid range is between 96 and
127.
Silence Suppression
This controls the silence suppression/VAD feature of the audio codec G.723 and
G.729. If set to “Yes”, when silence is detected, a small quantity
of VAD packets
(instead of audio packets) will be sent during the period of no talking. If set to
“No”, this feature is disabled.