Aastra Telecom 41-001343-02 Audio Transmit and Receive Gain Adjustments, Parameter Description

Operational 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 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 the
	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.
Handsfree tx gain	The increased (+db) or decreased (-db) amount of signal transmitted from the base microphone to the far-
	end party.
Audio mode	Allows you to configure how the d/f key (handsfree key) works. Audio mode has 4 options:
	• 0 (Speaker) - Calls can be made or received using the handset or handsfree speakerphone and can be
	switched between the two modes by pressing the d /fkey. When on speaker, you can return to using
	the handset by placing the handset on the cradle and picking it up again.
	• 1 (Headset) - Calls can be made or received using the headset. Calls can be switched between the head-
	set and handset by pressing the d /fkey.
	• 2 (Speaker/Headset) - Incoming calls are sent to the speakerphone. By pressing the d /fkey, you can
	switch between the handsfree speakerphone, the headset, and the handset.
	• 3 (Headset/Speaker) - Incoming calls are sent to the headset. By pressing the d /fkey, you can switch
	between the headset, the handsfree speakerphone, and the handset.

Configuring Audio Transmit and Receive Gain Adjustments

You can configure the audio transmit and gain adjustments using the configuration files only.

Use the following procedure to configure this feature.

Configuration Files

For specific parameters you can set in the configuration files, see Appendix A, the section, “Audio Transmit and Receive Gain Adjustment Settings” on page A-148.

5-36 41-001343-02 REV04 – 05.2014