attached USB headset is displayed along with other USB devices. The name of the USB device
directly appears from the USB devices themselves. The product description has no explicit
USB headset indications for the attached USB headset. The following figure displays the USB
Device Status screen showing the presence of a USB headset.
Figure 19: 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 Parameters
Values
Audio Format
PCM only
Subframe size
2
Bit Resolution
16 bits
Frequency Type
Continuous (0) or Discrete (> 0)
Sample Frequency
If Continuous, default to 16 KHz. If Discrete,
8 KHz, 16KHz or 8KHz multiple. Preference
is given to 16KHz audio, if supported
Audio Channel
Mono (1) or Stereo (2)
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
USB headset
Avaya 1165E IP Deskphone with SIP Software User Guide
November 2013 81
