TELES VoIPBox BRI, Reference Manual

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11 Additional VoIP parameters
VoIPBox BRI Version 18.0.002 Page 255
The following specifications for Quality of Service correspond
with RFC791 and RFC1349.
11.5 Compression parameters
The following parameters are for RTP multiplexing, which ag-
gregates RTP packets (voice user data) for individual VoIP calls
into a packet. The header (for Ethernet, IP, UDP and RTP) is
sent only once for all calls instead of for each individual call.
The relationship between header and payload benefits the
payload when several calls occur simultaneously. This com-
pression does not result in any loss in voice quality.
Table 11.7 Quality of service values
Bit
Distribution
0 1 2 3 4 5 6 7
Precedence TOS MBZ
Bit Description
0-2 Precedence
3 TOS: 0=normal delay, 1=low delay
4 TOS: 0=normal throughput, 1=high throughput
5 TOS: 0=normal reliability, 1=high reliability
6 TOS: 0=normal service, 1=minimize monetary cost
7 MBZ: must be 0 (currently not used)
Precedence Description
111 Network control
110 Internetwork control
101 CRITIC/ECP
100 Flash override
011 Flash
010 Immediate
001 Priority
000 Routine