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Chapter 4: Configuring your MVPGSM
Multi-Tech Systems, Inc. MVPGSM 30
Voice/Fax Parameter Definitions
Field Name Values Description
Default -- When this button is clicked, all Voice/FAX parameters are set to their default
values.
Select Channel 1-2 Channel to be configured is selected here.
Copy Channel -- Copies the Voice/FAX attributes of one channel to another channel.
Voice Gain -- Signal amplification (or attenuation) in dB.
Input Gain +31dB to
–31dB
Modifies audio level entering voice channel before it is sent over the IP network to
the remote SIP device. The default & recommended value is 0 dB.
Output Gain +31dB to
–31dB
Modifies audio level from IP to the voice channel. The default and recommended
value is 0 dB.
DTMF Gain -- The DTMF Gain (Dual Tone Multi-Frequency) controls the volume level of the DTMF
tones sent out for Touch-Tone dialing.
DTMF Gain,
High Tones
+3dB to
-31dB &
“mute”
Default value: -4 dB. Not to be changed except under supervision of Multi-Tech
Technical Support.
DTMF Gain, Low
Tones
+3dB to
-31dB &
“mute”
Default value: -7 dB. Not to be changed except under supervision of Multi-Tech
Technical Support.
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, the MultiVOIP GSM detects and regenerates
DTMF tones. When DTMF Inband is selected, the DTMF digits are passed through
the MultiVOIP GSM unit as they are received.
Out of Band
Mode
RFC 2833,
SIP Info
RFC2833 method. Uses RTP mode defined in RFC 2833 to transmit the DTMF digits.
SIP Info method. Generates DTMF tones on the telephony call leg. The SIP INFO
message is sent along the signaling path of the call. You must set this parameter per
the capabilities of the remote endpoint with which the VOIP will communicate. The
RFC2833 method is the more common of the two methods.
FAX Parameters – This section is grayed-out as Fax is not supported by the wireless channels
Fax Enable
Modem Relay
Enable
Max Baud Rate
(Fax)
Fax Volume
Jitter Value (Fax)
Mode (Fax)
Table is continued on next page…