Multi-Tech Systems MVP-2400, MVP-2410, MVP-3010 manual 336

E1 Phonebook Configuration MultiVOIP User Guide

PhoneBook Configuration Parameter Definitions

(cont’d)

Field Name	Values	Description
H.323 Version 4 Parameters
Parallel H.245	Y/N	FS (Fast Start or Fast Connect) is
(FS + Tun)		a Q.931 feature of H.323v2 to
		hasten call setup as well as ‘pre-
		opening’ the media channel
		before the CONNECT message is
		sent. This pre-opening is a
		requirement for certain billing
		activities. Under Parallel H.245
		FS + Tun, this Fast Connect
		feature can operate
		simultaneously with H.245
		Tunneling (see description
		above).
Annex –E (AE)	Y/N	Multiplexed UDP call signaling
		transport. Annex E is helpful for
		high-volume voip system
		endpoints. Gateways with lesser
		volume can afford to use TCP to
		establish calls. However, for
		larger volume endpoints, the call
		setup times and system resource
		usage under TCP can become
		problematic. Annex E allows
		endpoints to perform call-
		signaling functions under the UDP
		protocol, which involves
		substantially streamlined
		overhead. (This feature should
		not be used on the public Internet
		because of potential problems
		with security and bandwidth
		usage.)

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