Billing/Misc - Multitech MultiVOIP 100 MVP110 User Manual

Chapter 4 - MultiVOIP Software
remove echo and improve the quality of sound; and, Forward Error Correction allowing some of the
voice packets that were corrupted (or lost) to be recovered. FEC adds an additional 50% overhead to
the total network bandwidth consumed by the voice channel.

Billing/Misc

This tab controls the parameters for auto call, automatic disconnection, billing options, and dynamic
jitter buffer.
The Auto Call option allows the local MVP110 to call a remote MVP110 without the user having to
dial a Phone Directory Database number. As soon as you access the local MVP110 voice/fax
channel, the MVP110 immediately connects to the remote MVP110 that you identified in the Remote
MVP110 Phone Number field of this option.
The Automatic Disconnection group provides three options which can be used singly or in any
combination. The Jitter Value defines the average inter-arrival packet deviation (in milliseconds)
before the call is automatically disconnected.The default is 20 milliseconds. A higher value means
voice transmission will be more accepting of jitter. A lower value is less tolerant of jitter.
Consecutive Packets Lost defines the number of consecutive packets that are lost after which the
call is automatically disconnected. The default is 30 packets.
Call Duration defines the maximum length of time (in seconds) that a call remains connected before
the call is automatically disconnected. The default is 180 seconds. A call limit of three minutes may
be too short for most configurations. Therefore, you may want to increase this default value.
Billing Options can be used to track the cost of Inbound and/or Outbound calls on the FXS interface.
The amount to be charged in cents is entered in the Charge ( ) Cents box together with the
associated time duration in the Per ( ) Seconds box. While a given call is active, the accumulated
charges can then be viewed on the Call Progress dialog box. When the call ends, the charges are
transferred to a Log File that can be viewed by selecting the call event in the Log Entries dialog box
and selecting Details.
Dynamic Jitter Buffer defines a minimum and a maximum jitter value for voice communications.
When receiving voice packets from a remote MVP110, it is possible to experience varying delays
between packets due to traffic conditions on the network. This is called Jitter. To compensate for this
effect, the MVP110 uses a Dynamic Jitter Buffer. The Jitter Buffer allows the MVP110 to wait for
delayed voice packets by automatically adjusting the length of the Jitter Buffer between configurable
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