Multi-Tech Systems MVP210/410/810-SS manual Voice/Fax Parameter Definitions, Field Name Values

Chapter 4: Configuring your VOIP

Field Name	Values
Default	--
Select Channel	1-2 (210)
	1-4 (410)
	1-8 (810)
Copy Channel	--
Voice Gain	--
Input Gain	+31dB to
	–31dB
Output Gain	+31dB to
	–31dB
DTMF Gain	--
DTMF Gain,	+3dB to
High Tones	-31dB &
	“mute”
DTMF Gain, Low	+3dB to
Tones	-31dB &
	“mute”
DTMF Parameters
Duration (DTMF)	60 – 3000
	ms
DTMF	Out of
In/Out of Band	Band, or
	Inband
Out of Band	RFC 2833,
Mode	SIP Info

FAX Parameters

Fax Enable	Y/N
Modem Relay	Y/N
Enable
Max Baud Rate	2400,
(Fax)	4800,
	7200,
	9600,
	12000,
	14400 bps
Fax Volume	-18.5 dB
(Default =	to –3.5 dB
-9.5 dB)
Jitter Value (Fax)	Default =
	400 ms
Mode (Fax)	FRF 11;
	T.38

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Voice/Fax Parameter Definitions

Description

When this button is clicked, all Voice/FAX parameters are set to their default values. Channel to be configured is selected here.

Copies the Voice/FAX attributes of one channel to another channel. Attributes can be copied to multiple channels or all channels at once.

Signal amplification (or attenuation) in dB.

Modifies audio level entering voice channel before it is sent over the network to the remote VOIP. The default & recommended value is 0 dB.

Modifies audio level being output to the device attached to the voice channel. The default and recommended value is 0 dB.

The DTMF Gain (Dual Tone Multi-Frequency) controls the volume level of the DTMF tones sent out for Touch-Tone dialing.

Default value: -4 dB. Not to be changed except under supervision of Multi-Tech Technical Support.

Default value: -7 dB. Not to be changed except under supervision of Multi-Tech Technical Support.

When DTMF: Out of Band is selected, this setting determines how long each DTMF digit ‘sounds’ or is held. Default = 100 ms.

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.

RFC2833 method. Uses an RTP mode defined in RFC 2833 to transmit the DTMF digits.

SIP Info method. Generates dual tone multi frequency (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.

Enables or disables fax capability for a particular channel.

When enabled, modem traffic can be carried on VOIP system. When disabled, modem traffic will bypass the VOIP system (Modem Bypass mode).

Set to match baud rate of fax machine connected to channel (see Fax machine’s user manual).

Default = 14400 bps.

Controls output level of fax tones. To be changed only under the direction of Multi- Tech’s Technical Support.

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.

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 real time faxing of Group 3 faxes over IP networks. It uses T.30 fax standards and includes special provisions to preclude FAX timeouts during IP transmissions.

Multi-Tech Systems, Inc. 36