SIP SIP-Phone Administration Guide
35
7. DSCP Configure
Please refer to chapter
4.16 [tos] command
Set Signal or RTP Packet DSCP value:
-
Assured Forwarding (AF) PHB:
Select Delay priority and Drop Precedence
-
Expedited Forwarding (EF) PHB:
Select TOS value as EF
-
Default:
Select TOS value as 0
-
User Assign Special DSCP Code:
User can set other unspecified value here.
TOS/DiffServ (DS) priority function can discriminate the Differentiated Service Code
Point (DSCP) of the DS field in the IP packet header, and map each Code Point to a
corresponding egress traffic priority. As per the definition in RFC2474, the DS field is
Type-of-Service (TOS) octet in IPv4. The recommended DiffServ Code Point is defined
in RFC2597 to classify the traffic into different service classes. The mapping of Code
Point value of DS-field to egress traffic priorities is shown as follows.
