Operational Features41-001343-02 REV05 – 07.2014 5-38Audio Transmit and Receive Gain AdjustmentsThe audio gain properties for the IP phone handset, headset, and speakerphone is adjusted to reduce side-tone and echoon the local and far-end equipment. You can adjust these settings from -10 db to +10 db to best suit your comfort leveland 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 modeThe default setting for these parameters is 0 (zero).The following table describes each parameter.Configuring Audio Transmit and Receive Gain AdjustmentsYou can configure the audio transmit and gain adjustments using the configuration files only.Use the following procedure to configure this feature.Note:Aastra recommends you leave the default of 0 (zero) as the settings for these parameters.Parameter DescriptionHeadset tx gain The increased (+db) or decreased (-db) amount of signal transmitted from the headset microphone to thefar-end party.Headset sidetone gain The increased (+db) or decreased (-db) amount of sidetone signal from the headset microphone to theheadset speaker.Handset tx gain The increased (+db) or decreased (-db) amount of signal transmitted from the handset microphone to thefar-end party.Handset sidetone gain The increased (+db) or decreased (-db) amount of sidetone signal from the handset microphone to thehandset 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 beswitched between the two modes by pressing the d /fkey. When on speaker, you can return to usingthe 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 canswitch 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 switchbetween the headset, the handsfree speakerphone, and the handset.Configuration FilesFor specific parameters you can set in the configuration files, see Appendix A, the section, “Audio Transmit and Receive Gain Adjustment Settings” onpage A-149.
