SIP Peer incoming calls go to straight to voicemail

I am running Asterisk (Ver. 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. isn’t even the final release of 1.6.2; that is, 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.