Panasonic KX-TGP500B04 Administrator's Manual page 184

4.7.2 SIP Settings
Value Format
Description
184 Administrator Guide
Integer
Specifies the value to be stored in the ToS field in the IP header of SIP
messages.
Note
•
The structures of the ToS/DS field in an IP header are shown
below.
ToS field
0 1
Precedence
3 bits
DS field
0 1
The ToS field consists of a 3-bit precedence, a 4-bit type of
service, and a 1-bit unused field.
The DS filed consists of a 6-bit DSCP and a 2-bit unused field.
2 3 4
Type of Service
4 bits
2 3 4
DSCP
6 bits
Document Version
5 6 7
Currently
unused
1 bit
5 6 7
Currently
unused
2 bits
2010-08