Byte

Description

0, 1

Tag 0x294A

2,3

Length 0x0004

4-7

Value This field is a 32-bit mask. Each bit selects specific
SIP Extension SIP message fields and is listed

from LSB to MSB.

0 - Disable

1 - Enable

Supported header tags

Bit 0 - Timer

Bit 1 - 100rel (PRACK)

Bits 2-15 - Reserved

Required header tags

Bit 16 - Timer

Bit 17 - 100rel(PRACK)

Bits 18-31 - Reserved