IP Office Product Description
IP Office 4.2
© 2008 AVAYA All rights reserved.
Page 135
Issue 18.b.- (08 July 2008)
Bandwidth Required For Each Voice Call?
The bandwidth used varies depending on the compression method chosen. IP Office supports a wide range of
compression standards, including the most popular G.723.1 and G.729a. These will occupy approximately 10K
and 13K of bandwidth respectively.
Use the following chart to choose the most appropriate compression algorithm for your available bandwidth.
Algorithmi
c Delay
(milli-
seconds)
Acceptable Delay?
End-to-end delay should be 150 milliseconds or below.
How Many Simultaneous Calls Can I Get Down My Link?
The following chart illustrates the theoretical maximum number of simultaneous voice calls that can be
delivered over a WAN for a given link speed. This does not take into account any bandwidth that may be
required for data traffic between sites or the physical limit of VoIP calls for the specific version of IP Office in
use.
The number of simultaneous voice calls can be in excess of the capabilities of the individual platform, where
the calls transit the switch as data traffic. In this situation compression resources are not used but obviously
must be catered for in the overall bandwidth provision.
Algorithmic Delay
(seconds)
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