Dialogic DMG1000 User Manual page 78

Parameter Reference
Call Control QOS Byte
Description: The Call Control QOS Byte parameter defines a decimal byte value that represents
QOS bit flags. This parameter is used in each call control (SIP or H.323) data packet transmitted
from the Media Gateway with a QOS byte code. Routers use this byte code to assign priority levels
to packets. The QOS byte may be interpreted as either IPv4 TOS or DiffServ.
Note: H.323 is only supported in Version 5.1 SU1 Software or earlier.
IPv4 TOS Byte
Bits:
0-2 = Precedence (RFC 1122)
3-6 = Type of Service (RFC 1349/1455)
7 = Must be zero
PrecedenceBits (0-2):
111xxxxx (224) = Network Control
110xxxxx (192) = Internetwork Control
101xxxxx (160) = CRITIC/ECP
100xxxxx (128) = Flash Override
011xxxxx (96) = Flash
010xxxxx (64) = Immediate
001xxxxx (32 = Priority
000xxxxx (0) = Routine
Type of Service Bits (3-6):
xxx0000x (0) = Normal
xxx1000x (16) = Minimize delay
xxx0100x (8) = Maximize throughput
xxx0010x (4) = Maximize reliability
xxx0001x (2) = Minimize monetary cost
xxx1111x (30) = Maximize physical link security
xxx (32 = Priority
xxx (0) = Routine
Default Value = 0 (Routine/Normal)
DiffServ Codepoint Byte
Bits:
0-5 = Differentiated Services Codepoint (RFC 2474)
6-7 = Explicit Congestion Notification (RFC 2481)
Allowed Values: 0-255
Default Value = 0
INI File Parameter Name = gwQosCallControl
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Dialogic 1000 and 2000 Media Gateway Series User's Guide — September 2007
Dialogic Corporation