Multi-Tech Systems 410, MVP103 manual Jitter

Chapter 3 – Related MultiVOIP Setup Parameters

		Voice/Fax Parameter Definitions Continued
Field	Values	Description
Name
AutoCall/Offhook
Alert Parameters
Auto	AutoCall,	The AutoCall option enables the local MultiVOIP to place a call without the user
Call /	Offhook	having to dial a number. As soon as you access the local MultiVOIP voice/fax
Offhook	Alert	channel, the MultiVOIP immediately connects to the remote endpoint identified
Alert		in the Phone Number box of this option.
		If the “Pass Through Enable” field is checked in the Interface Parameters screen,
		AutoCall must be used.
		The Offhook Alert option applies only to FXS channels.
		The Offhook Alert option works like this: if a phone goes offhook and no
		number is dialed within a specific period of time (as set in the Offhook Alert
		Timer field), then that phone will automatically dial the Alert phone number for
		the voip channel. (The Alert phone number must be set in the Voice/Fax
		Parameters Phone Number field). One use of this feature would be for
		emergency use where a user goes off hook but does not dial, possibly indicating
		a crisis situation. The Offhook Alert feature uses the Intercept Tone, as listed in
		the Regional Parameters screen. This tone will be output on the phone that was
		taken off hook but that did not dial. The other end of the connection will hear
		audio from the “crisis” end as it would during a normal phone call.
		Both functions apply on a channel-by-channel basis. It would not be appropriate
		for either of these functions to be applied to a channel that serves in a pool of
		available channels for general phone traffic.
Generate	Y/N	Used for AutoCall only. If selected, dial tone will be generated locally while the
Local		call is being established between gateways. The capability to generate dial tone
Dial		locally would be particularly useful when there is a lengthy network delay.
Tone
Offhook	0 – 3000	The length of time that must elapse before the offhook alert is triggered and a call
Alert	seconds	is automatically made to the phone number listed in the Phone Number field.
Timer
Phone	--	Phone number used for Auto Call function or Offhook Alert Timer function.
Number
Dynamic	Jitter
Dynamic		Dynamic Jitter defines a minimum and a maximum jitter value for voice
Jitter		communications. When receiving voice packets from a remote
Buffer		MultiVOIP, varying delays between packets may occur due to network
		traffic problems. This is called Jitter. To compensate, the MultiVOIP uses
		a Dynamic Jitter Buffer. The Jitter Buffer enables the MultiVOIP to wait
		for delayed voice packets by automatically adjusting the length of the
		Jitter Buffer between configurable minimum and maximum values. An
		Optimization Factor adjustment controls how quickly the length of the
		Jitter Buffer is increased when jitter increases on the network. The length
		of the jitter buffer directly effects the voice delay between MultiVOIP
		gateways.

40 Multi-Tech Systems, Inc. Avaya Communication Manager Guide