Avaya Nortel Communication Server 1000 Manual page 138

138 Features
of 320 kb/s for the voice packet data. In a typical 100 Mb/s LAN network
environment, if 80% of the bandwidth was configured for voice data, then
this network could support a maximum of 500 simultaneous IP Phone calls.
When the IP Call Recording feature is enabled, that same network is limited
to a maximum of 250 calls.
For remote users connecting to the IP Call Recorder Server through a
WAN connection, the impact of the bandwidth usage to the QoS must be
considered. In this case, the IP Call Recorder Server must provide the QoS
parameters when instructing the IP Phone to echo the voice data.
Depending on the IP Call Recorder Server ability to handle the RTP stream,
more than one IP Call Recorder Server can be required in a large call
center environment. Middleware (software that connects two sides of an
application and passes data between them) must have an algorithm to
balance the traffic between the different servers.
Feature interactions
This section describes IP Call Recording feature interactions.
Mute key
When the Mute key is pressed, the IP Phone keeps both the primary and
the duplicate audio stream open. When Mute is pressed, the recording state
remains active, but only the incoming conversation is recorded. Pressing
the Mute key a second time resumes normal recording.
Hold key
When the Hold key is pressed, a Stop Recording Request message is sent
from the Call Server, and the duplicate media stream is closed. A new audio
stream is opened for the other active call. When the hold is released, a
new Start Recording Request is sent from the Call Server to the IP Phone
and recording begins again.
Transfer key
After the Transfer key is pressed and the transfer accepted, the current
audio stream is closed. A new audio stream for the new call is opened,
followed by a Start Recording Request message. If the IP Phone that
accepted the transferred call does not have call recording enabled, the
transferred call is not recorded.
Copyright © 2003–2008, Nortel Networks
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(100 x 1000 x 0.8 / 160) = 500
Nortel Communication Server 1000
IP Line Fundamentals
NN43100-500 02.02 Standard
Release 5.5 4 February 2008