User's Manual

566 Headset support
Wireless USB headsets
For a complete list of wired and wireless headsets that provide acceptable
audio quality with Nortel IP Phones, see the Product Information Centre
(PIC) at w
ww.nortel.com.
USB audio limitations and restrictions
The following sections describe USB audio limitations and restrictions that
apply with the Nortel IP Phone.
IP Phone USB audio limitations
•
IP Phone USB Audio does not support stereo audio. If you use a
stereo headset, the audio is merged to mono (identical audio is
transmitted to both the left and right ear pieces). All audio received by
the headset microphone is mono.
•
When you use USB audio on an IP Phone 1120E or an IP Phone
1140E connected to a BCM system, you can hear a continuous cycle
of error tones from the headset if you inadvertently hit a call control
key. You can clear the error condition by hanging up the call.
USB headset power restrictions
USB headsets can draw power from the IP Phone USB port to operate.
The USB port on the IP Phone provides a maximum of 100mA, which can
power the Nortel USB adapters.
ATTENTION
Connecting USB headsets that draw more than 100mA to the IP Phone can
cause the USB port on the IP Phone to shut down. The IP Phone 1165E can
support 500 mA if it is AC powered, 100 mA on PoE power.
For information about ATA USB power restrictions, see “ATA USB power
limitations” (page 567).
USB audio firmware limitations
•
Firmware version V2.0.32 or later is required for Nortel USB Adapters.
• Firmware version v1.00.32 or later is required for the Algo
4900 USB ATA. You can use the Windows based Algo 4900
USB ATA configuration tool to verify the firmware version
and to upgrade the firmware. For more information, see
h
ttp://www.algosolutions.com/products/usbATA/fw-download.html.
Nortel Communication Server 1000
IP Phones Fundamentals
NN43001-368 05.06 30 April 2010
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