Manual
Table Of Contents
36
Outgoing Services
As described above, the mainframe will make outgoing connections to register with SIP providers (usually to port
UDP 5060) combined with incoming and outgoing RTP in the range of UDP 16384-16432.
An NTP client is implemented by default to UDP 123.
The mainframe syncs by default to a Comrex cloud server at TCP 8090. This is currently not required for normal
operation.
SIP connection attempts will sometimes make external STUN connections to UDP 3478.