I am running Asterisk (Ver. 1.6.2.9) and I have a SIP Peer that shows as registered that can make outgoing calls fine, however, all incoming calls go straight to voicemail. I have added in Port Forwardings, any other suggestions? Thank you.
Can you post relevant CLI output and dialplan?
Upgrade to a supported version. 1.6.2.9 isn’t even the final release of 1.6.2; that is 1.6.2.24, but that is five years past end of life.
If it still doesn’t work, provide your configuration, and verbose and debug logs, including" sip set debug on2 logs.