If you are unable to port forward the full RTP range, then it is likely you will continue to have problems. If your trunks are chan_sip, you can try enabling progressinband:
I’m not sure if there is a corresponding setting for pjsip trunks.
If you are unable to port forward the full RTP range, then it is likely you will continue to have problems. If your trunks are chan_sip, you can try enabling progressinband:
I’m not sure if there is a corresponding setting for pjsip trunks.