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MultiVOIP User Guide Technical Configuration (Analog/BRI)
231
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. Not supported in 5.02c BRI
software.
DTMF
In/Out of
Band
Out of
Band, or
Inband
When DTMF Out of Band is selected,
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. In 502c BRI software, “DTMF
Out of Band” can be checked or
unchecked.
FAX Parameters
Fax Enable Y/N Enables or disables fax capability for a
particular channel.
Max Baud
Rate
(Fax)
2400, 4800,
7200, 9600,
12000,
14400 bps
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, 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.