Aastra Telecom SISIP 57I CT - Manual (Page 274)

Operational Features
5-146 41-001160-00, Rev 01 Release 2.0
IP Phone Administrator Guide
Operational IP Phone Features
Audio Transmit and Receive Gain Adjustments
The audio gain properties for the IP phone handset, headset, and speakerphone is
adjusted to reduce side-tone and echo on the local and far-end equipment. You can
adjust these settings from -10 db to +10 db to best suit your comfort level and
deployment environment by using the following parameters in the configuration
files:
• headset tx gain
• headset sidetone gain
• handset tx gain
• handset sidetone gain
• handsfree tx gain
• audio mode
The default setting for these parameters is 0 (zero).
The following table describes each parameter.
Note: Aastra Telecom recommends you leave the default of 0 (zero) as
the settings for these parameters.
Parameter Description
Headset tx gain The increased (+db) or decreased (-db) amount of signal transmitted from
the headset microphone to t he far-end party.
Headset sidetone gain The increased (+db) or decreased (-db) amount of sidetone signal from the
headset microphone to the headset speaker.
Handset tx gain The increased (+db) or decreased (-db) amount of signal transmitted from
the handset microphone to the far-end party.
Handset sidetone gain The increased (+db) or decreased (-db) amount of sidetone signal from the
handset microphone to the handset speaker.
(continued)