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Technical Configuration (T1/E1) MultiVOIP User Guide
136
The IP Parameters fields are described in the table below.
IP Parameter Definitions
Field Name Values Description
DiffServ
Parameter
fields
DiffServ PHB (Per Hop Behavior) values
pertain to a differential prioritizing
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 next page explains DiffServ in the
context of the IP datagram.
Call Control
PHB
0 – 63
default = 34
Value is used to
prioritize call setup IP
packets.
Voip Media
PHB
0 – 63
default = 46
Value is used to
prioritize the RTP/RTCP
audio IP packets.
Frame Type Type II, SNAP Must be set to match
network’s frame type.
Default is Type II.