Audio Format Selection - Avaya 1120E User Manual

Configuring the Avaya 1120E IP Deskphone
Figure 20: USB Device Status screen showing the presence of a USB headset

Audio format selection

After the IP Deskphone receives the endpoint configurations, it searches the records to select
an audio format that matches the IP Deskphone requirements. If no match is found, then the
default audio format is used. After you select the format, the IP Deskphone sends a command
to the device to select the corresponding endpoints for audio transfers.
The IP Deskphone supports both 8KHz and 16KHz audio. You can select the 16KHz audio, if
the headset supports it. The IP Deskphone is a mono device with only one voice channel. For
stereo USB headsets detected, the IP Deskphone replicates one channel voice data to both
left and right channels of the headsets to simulate stereo output.The following table lists the
audio format requirements supported by the IP Deskphone.
Audio Format
Subframe size
Bit Resolution
Frequency Type
Sample Frequency
Audio Channel
After you select the format and the Set Interface command is sent, the USB headset runs in
Generic Mode 1 operation (both audio and HID) or Mode 2 operation (audio only). If the headset
84 Avaya 1120E IP Deskphone with SIP Software User Guide
Audio Parameters
Comments? infodev@avaya.com
Values
PCM only
2
16 bits
Continuous (0) or Discrete (> 0)
If Continuous, default to 16 KHz. If Discrete,
8 KHz, 16KHz or 8KHz multiple. Preference
is given to 16KHz audio, if supported
Mono (1) or Stereo (2)
November 2013