Aastra Telecom 57I C53I Audio Transmit and Receive Gain Adjustments, Headset sidetone gain

IP Phone Administrator Guide Operational Features

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).

Note: Aastra Telecom recommends you leave the default of 0 (zero) as the settings for these parameters.

The following table describes each parameter.

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)

5-146 41-001160-00, Rev 01 Release 2.0