Use Sip Addresses; Domain Name; Call Is Connected But There Is No Audio; Changing Audio Settings While On A Call - Nortel IP Phone 2002 User Manual

Standard

Use SIP addresses

Rather than dialing an IP address (for example, ron@12.134.47.78), remember to
use the SIP address (for example, ron3@acme.com). The proxy server that routes
the call can serve several domains, and not know the domain where a user IP
address resides.

Domain name

You must enter the domain (for example, @acme.com) if the person you are
calling is not in your domain.

Call is connected but there is no audio

If you are using the handset, check that the headset button is not activated. The red
LED beside the headset button indicates when the headset option is active. When
the headset option is active, and even if there is no headset plugged in, you cannot
receive or transmit audio through the handset.

Changing audio settings while on a call

While on a call, you can change speech codec settings to achieve better audio
quality. The term codec is an acronym that stands for "Compression/
Decompression." The codec setting controls how speech compresses and
decompresses into digital packets for transmission over the network. However, it
also means that the speech delay is increased on the call.
1 During an active call, press the Audio soft key.
Note: The domain name in a user address need not be an Internet
domain.
Note: The changed setting applies only to the current active call. The
settings return to default for the next call.
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