Hi,

I currently have a fortinet 60a firewall and Grandstream GXP2000.

I can call out fine, but if someone rings me, it does not ring on the GXP2000 but ringing tone comes from the dialling phone.

has anybody has this issue?

1. Does the software phone work ?
2. Where is the call coming from, is it another SIP phone or from the PSTN ?

Hi Mod,

have not tried softphone.

I'm calling from a mobile to the unit.

I suggest trying the softphone.

It may be that your firewall is blocking the SIP messages. If you phone is unreachable but the contact has been updated to the service then it will continue to try for a period before going to voicemail... if you hear ringing for an extended period (>30 secs) then your phone must be generating the tone.