Multi-Tech Systems MVP400

MultiVOIP Quick Start Guide

Note: The DTMF gain should be changed only with the

assistance of Multi-Tech Technical Support.

18. To change the voice coder, select the channel from the

Select Channel list, then click Manual in the Coder group.

Select the new voice coder entry from the Selected Coder

list.

If you changed the voice coder, ensure that the same

voice coder is used on the voice/fax channel you are

calling. Otherwise, you will always get a busy signal.

Note: If you allow the Coder to be selected automatically,

then you need to enter the Max Bandwidth. Check with

your network administrator to determine how much

bandwidth is available.

19. The Fax group enables you to send/receive faxes on the

selected voice/fax channel. You can select the maximum

baud rate for faxes and the fax volume and enter the jitter

value in milliseconds.

When receiving fax packets from a remote MultiVOIP 400/

800, it is possible for individual packets to be delayed or

received out of order due to traffic conditions on the

network. To compensate for this ef fect, the MultiVOIP 400/

800 uses a Jitter Buf fer. The Jitter Value enables the

MultiVOIP 400/800 to wait a user-definable period of time,

in milliseconds, for delayed or out of order fax packets.

The range of allowable Jitter Values is 0 to 400

milliseconds, with a default of 400 milliseconds.

If you do not plan to send or receive faxes on a given

voice/fax channel, you can disable faxes in the Fax group.

20. You can enable the voice/fax advanced features by

clicking (checking) the silence compression, echo

cancellation, or forward error correction options.

The Silence Compression check box defines whether

silence compression is enabled for this voice channel. If

silence compression is enabled, the MultiVOIP 400/800