User guide

Installing the i2050 Software Phone 31
Internet Phone User Guide Nortel Networks
Step 2: Install the USB Audio Headset
Overview of 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, 98SE, 2000, 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