A D D I T I O N A L V O I P P A R A M E T E R S
C H A P T E R 1 4
235
ECOTEL 3G 16.1. Revised: 2011.
1 4 . 5 C O M P R E S S I O N P A R A M E T E R S
The following parameters are for RTP multiplexing, which aggregates 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 simul-
taneously. This compression does not result in any loss in voice quality.
This feature is possible with a Teles peer and requires the following entries in the VoIP profile:
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
Table 14.8
Customized Parameters: VoIP Compression
VoIP Compression Parameters
VoipAggRemoteRtpPort=<port>
Enter the port for the VoIP peer that is the first RTP port. The next port is always the corresponding RTCP
port. The port that is two numbers higher will be used for the next VoIP channel. Default 29000.
VoipAggRemoteDataPort=<port>
VoipAggRemoteDataPort=29500
Enter the port for the VoIP peer that is used for aggregated packets (compressed data). Default: 29500.
VoipAggOwnDataPort=<port>
VoipAggOwnDataPort=29500
Enter the own port number used for aggregated packets. Default: 29500.
VoipAggRemoteRtpPortSpacing=<count>
Defines the space between the ports used for the peer’s individual RTP streams (default 2).
Table 14.7
Quality of Service Values
(continued)
