Multi-Tech Systems MVPFX2-2 manual IP Parameter Definitions, Field Name Values Description

Technical Configuration MultiVOIP FX User Guide

The IP Parameters fields are described in the tables and text passages below. Note that both DiffServ parameters (Call Control PHB and VoIP Media PHB) must be set to zero if you enable Packet Prioritization (802.1p). Nonzero DiffServ values negate the prioritization scheme.

	IP Parameter Definitions
Field Name	Values	Description
Ethernet Parameters
Frame Type	Type II, SNAP	Must be set to match
		network’s frame type.
		Default is Type II.
DiffServ	DiffServ PHB (Per Hop Behavior) values
Parameter	pertain to a differential prioritizing
fields	system for IP packets as handled by
	DiffServ-compatible routers. There are 64
	values, each with an elaborate technical
	description. These descriptions are found in
	TCP/IP standards RFC2474, RFC2597, and,
	for present purposes, in RFC3246, which
	describes the value 34 (34 decimal; 22 hex) for
	Assured Forwarding behavior (default for
	Call Control PHB) and the value 46 (46
	decimal; 2E hexadecimal) for Expedited
	Forwarding behavior (default for Voip Media
	PHB). Before using values other than these
	default values of 34 and 46, consult these
	standards documents and/or a qualified IP
	telecommunications engineer.
	To disable DiffServ, configure both fields to 0
	decimal.
	The passage following this table explains
	DiffServ in the context of the IP datagram.
		Value is used to
Call Control	0 – 63
PHB	default = 34	prioritize call setup IP
	.	packets.
		Value is used to
Voip Media	0 – 63
PHB	default = 46	prioritize the RTP/RTCP
	n	audio IP packets.

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