Multi-Tech Systems MVP-2410 User Manual

70 

  

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 
n 

Value is used to 
prioritize the RTP/RTCP 
audio IP packets.