I have a SIP turnk which works fine with both inbound and outbound calling.
However, the only issue is that there is no Ring Tone if someone calls us.
The phones used are Aastra and Polycom connected to the PBX via VPN (SIP). I do get an outbound ring tone, so it's not that there is any media loss
between the phones and the PBX. But when the DID is called there is dead
silence until the call is picked up. What is generally causing something like this? and where should I start