Samsung SMG-400 User Manual page 209

Combinations of TOS bits and their meanings are shown below:
7
6
5
4
3
2
1
0
U U - - law law
One of two algorithms used in telephony to logarithmically compress or expand digitized speech.
U-law is used in North America and Japan. A-law is the algorithm used in European networks.
Wink Start Wink Start
A type of trunk signaling. When the PBX at the sending end seizes a trunk line a call is initiated.
The receiving end maintains its Off-Hook status for a short period (150-300ms, and 250ms on av-
erage) after being ready to receive call data until it becomes On-Hook. When the sending end
sends dialing related signals call information is delivered to a subscriber at the receiving end.
When the subscriber lifts the handset (Off-Hook) the call line is connected. When either party of
the telephone call replaces the handset (On-Hook), the call is terminated.
111 Network Control
110 Internetworking Control
101 CRITIC/ECP
100 Flash Override
011 Flash
010 Immediate
001 Priority
000 Routine
C-7