Flipping chan sip/PJSIP default protocol

You may want to use the PJSIP protocol as default protocol on port 5060 for your endpoints. You need to remember the server to server and the server internal calls must still be run over chan_sip protocol. These are the changes to apply:

in pjsip.conf change the port from 5080 to 5060, 5081 tp 5061 and so on, based on the protocols you are using

in sip.conf set the "bindport" to 5080 in the [general] section. Set the port parameter "port=5080" in the [pbx] sections

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