Nortel Networks BCM50 2.0 - Manual (Page 16)

16 Chapter 3 Installing the IP Softphone 2050
NN40050-300 NN40050-300
USB Audio Kit
Operation of the IP Softphone 2050 requires the use of the Nortel USB Audio Kit. The USB Audio
Kit provides a high quality predictable audio interface that is highly optimized for telephony
applications. The USB Audio kit allows the IP Softphone 2050 to have an absolute and predictable
loss and level plan implementation, which is necessary to meet TIA-810, FCC part 68 and its
international equivalents as well as the ADA requirements for the hearing impaired. With the USB
Audio kit, the IP Softphone 2050 can achieve performance rivaling or surpassing that of hardware
telephones.
The USB Audio Kit is fully-compliant with version 1.1 of the USB Device Specification and
Windows Plug & Play specifications. It is fully compatible with the suspend and resume functions
for effective use in battery operated laptops. It is functional on Windows 2000 Professional,
Windows 98, Windows 98 Second Edition, Windows Millennium and Windows XP. No drivers or
software are required for installation.
In the box
• USB Headset Adapter
• Installation Guide (English and French)
• USB cord
• Telephony grade mon-aural headset
• Lower cordset with quick disconnect
Connectors
• RJ-9 headset/handset jack or mini jack (depending on model)
• Accessory jack for “in-use” lamp (not on all models)
• USB device jack
Specifications
• Native Audio format: 16 bit linear 8 KHz over USB, limited to 8 bit PCM logarithmic coding
in hardware
• OS Compatibility: Windows 2000, Windows ME, Windows XP
• Power Source: USB power provided from computer
• Enumeration: Enumerates as USB Composite Device and USB Audio Device
• Channels: Mandatory control channel for enumeration, Bi-directional isochronous channel
for audio
• Electret Microphone Bias: 3 V
• Maximum SPL Protection: Limited in headset
• In-Use Lamp Connector: Isolated contact closure - polarity insensitive