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14 Chapter 2 Installing the i2050 Software Phone
P0988431 Issue 03
USB Audio Kit
Operation of the i2050 Software Phone requires the use of the Nortel Networks USB Audio Kit.
The USB Audio Kit provides a high quality predictable audio interface which is highly optimized
for telephony applications. The USB Audio kit allows the i2050 Software Phone 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 i2050 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, and Windows Millennium. No drivers or software are
required for installation.
In the box
• USB Headset Adapter
• Installation Guide (English and French)
•USB cord
• Telephony grade monaural headset
• Lower cordset with quick disconnect
Connectors
• RJ-9 headset/handset jack
• Accessory jack for “in-use” lamp
• 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 98, Windows 98SE, Windows 2000, Windows ME
• 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