C-7
Combinations of TOS bits and their meanings are shown below:
7
111
Network Control
6
110
Internetworking Control
5
101
CRITIC/ECP
4
100
Flash Override
3
011
Flash
2
010
Immediate
1
001
Priority
0
000
Routine
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.
