Help > Functions and applications > VoIP > VoIP channels
VoIP channels
The number of available VoIP channels depends on the codecs used, defined by the set VoIP operation mode. The overviews below give information about possible combinations.
COMtrexx Business:Installed and configured 4FXS modules reduce the available VoIP operation modes and therefore also the maximum number of available VoIP channels. If a 4FXS module has been added at a later point of time so that the current VoIP operating mode is not possible, the VoIP operation mode has to be changed manually.
*Further help under Hardware
COMtrexx VM: overview of the available channels and codecs
VoIP operating mode
Classic
VoIP oriented
VoIP maximum
VoIP channels (max. possible)
190
370
500
codecs internal
G.711
+
+
+
G.729
+
–
–
G.722
+
–
–
codecs external
G.711
+
+
+
G.729
+
+
–
G.722
+
–
–
COMtrexx Business: overview of available channels, codecs and modules
VoIP operating mode
Classic
Broadband
VoIP oriented
VoIP maximum
VoIP channels (max. possible)
54
64
66
80
codecs internal
G.711
+
+
+
+
G.729
+
–
–
–
G.722
+
+
–
–
codecs external
G.711
+
+
+
+
G.729
+
–
+
–
G.722
+
+
–
–
one 4FXS module
+
+
+
–
two to five 4FXS modules
+
–
–
–
NET module
+
+
+
+
Configuration
•Configuring VoIP operation mode.
−Administration > VoIP > VoIP configuration > Presetting of the VoIP channels
•Distributing the VoIP channels.
−Administration > VoIP > VoIP configuration > Distribution of the VoIP channels
•Reserving VoIP channels for VoIP provider.
−Exchange lines > Providers and Accounts > > RTP