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Technical Configuration (Digital Voips) MultiVOIP User Guide
140
Voice/Fax Parameter Definitions (cont’d)
Field Name Values Description
DTMF Parameters
Duration
(DTMF)
60 – 3000
ms
When DTMF: Out of Band is selected,
this setting determines how long each
DTMF digit ‘sounds’ or is held.
Default = 100 ms.
DTMF In/Out
of Band
Out of
Band, or
Inband
When DTMF Out of Band is selected
(checked), the MultiVOIP detects DTMF
tones at its input and regenerates them at its
output. When DTMF Inband is selected,
the DTMF digits are passed through the
MultiVOIP unit as they are received.
FAX Parameters
Fax Enable Y/N Enables or disables fax capability for a
particular channel.
Max Baud
Rate
(Fax, bps)
2400, 4800,
7200, 9600,
12000, 14400
Set to match baud rate of fax machine
connected to channel (see Fax machine’s
user manual). Default = 14400 bps.
Fax Volume
Default =
-9.5 dB
-18.5 dB
to –3.5 dB
Controls output level of fax tones. To be
changed only under the direction of Multi-
Tech’s Technical Support.
Jitter Value
(Fax)
Default =
400 ms
Defines the inter-arrival packet
deviation (in milliseconds) for the fax
transmission. A higher value will
increase the delay, allowing a higher
percentage of packets to be
reassembled. A lower value will
decrease the delay allowing fewer
packets to be reassembled.
Mode (Fax) FRF 11;
T.38
(T.38 not
currently
sup-ported)
FRF11 is frame-relay FAX standard
using these coders: G.711, G.728,
G.729, and G.723.1.
T.38 is an ITU-T standard for storing
and forwarding Faxes via email using
X.25 packets. It uses T.30 fax
standards and includes special
provisions to preclude FAX timeouts
during IP transmissions.