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Voice Overbooking

Warning: If used incorrectly, this feature could have a severe impact to the quality of voice in your network. If you are unfamiliar with the requirements for enabling this parameter, it is strongly suggested you leave it in the default state (disallowed).


The following table displays basic settings for suggested number of voice channels to WAN link bandwidth settings with Voice Overbooking allowed:

WAN Link Bandwidth

# of Voice Channels*

North American Speech Pattern**

# of Voice Channels*

Asian Speech Pattern**

64 kb/s

6

5

128 kb/s

16

14

192 kb/s

28

23

168 kb/s

40

33
*Recommended values based on the following conditions: no other traffic is present, no fax channels is present, SAD ON, lost speech frames within 1 percentile, no blocking factor present.
** North American speech pattern is 40% active, Asian speech pattern is 50% active.

The following sections describe how to allow or disallow voice overbooking for the Passport 4400 unit:

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