I have a customer who has a Siemens C470IP behind a Cisco RV320
Customer IP : 95.182.yyy.xxx
SIP serveur : 126.96.36.199 (sip.ovh.be)
How it works :
- the sip account register on our sip server :
95.182.yyy.xxx:5060 --- REGISTER ----> 188.8.131.52:5962
We send keepalive each minute to keep the translation of the port 5060 to the sip equipement.
184.108.40.206:5962 ---- OPTIONS (keepalive) ----> 95.182.yyy.xxx:5060
We can see that, after a REGISTER the next OPTIONS request get an answer (200 OK) and the other requeste don't get answer.
when we send a call to the customer, this one doen't answer on our INVITE request
it seems that there is no more translation between the port 5060 with the equipement on the local network.
We got the same problem with zyxell router. We have to upgrade UDP Sesison ( cf : http://ovh.to/c165iMV )
How to do the same with RV320 or RV042 ?
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