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13. If you want to dedicate a local voice/fax channel to a remote voice/fax channel (so you will not
have to dial the remote channel), click the Auto Call Enable option in the Auto Call group. Then
enter the phone number of the remote MultiVOIP 200 in the Phone Number field.
14. The Automatic Disconnection group provides three options to be used singly or in combination.
The Jitter Value defines the average inter-arrival packet deviation (in milliseconds) before the
call is automatically disconnected. Jitter is the inter-arrival packet deviation (phase shift of digital
pulses) over the transmission medium that causes voice breakup which can be particularly
disruptive to voice communications. The default setting is 20 milliseconds. A higher value means
that the voice transmission will be more accepting of jitter. A lower value will be 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 setting 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 setting 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.
15. You can set billing options for inbound and/or outbound calls by checking them in the Billing
Options group and then entering the charge in cents per number of seconds.
16. A minimum and maximum set of values can be set for Dynamic Jitter Buffer. When receiving
voice packets from a remote MultiVOIP 200, 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 MultiVOIP 200 uses a Dynamic Jitter Buffer. The Jitter Buffer allows the MultiVOIP 200
to wait for delayed voice packets by automatically adjusting the length of the Jitter Buffer between
configurable minimum and maximum values. An Optimization Factor adjustment controls how
quickly the length of the Jitter Buffer is increased when jitter increases on the network. The length
of the jitter buffer directly effects the voice delay between MultiVOIP 200 gateways.
The Minimum Jitter Value default setting is 150 milliseconds, the Maximum Jitter Value default
setting is 300 milliseconds, and the Optimization Factor default setting is 7.
Note: After configuring a given channel (1 or 2), you can copy that channel's configuration to the
other channel by clicking the Copy button. Everything on the Billing/Misc tab will be copied to
the other channel.
If your country/region is not the default USA, click the Regional tab and proceed to step 17;
otherwise, proceed to step 18 to begin building your phone directory database.
Chapter 3 - Software Loading and Configuration
47
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