HI All,
I am getting more and more frustrated and am hoping someone can help. DT700 12 and 24 Button connecting to SV8100 via IPSec VPN. Handset registers fine, but loses connection after a while ( Ranging from 10 Minutes to 8 Hours).
I ran a Wireshark trace and found that handsets at the remote sites tend to re-register with the SIP server at varying intervals. Occasionally a registration request will get a "Status: 401 Unauthorised" response from the SV8100, and that's that. To connect again, reset handset to Factory default and reconfigure with IP, Gateway, Subnet, Sip server address and port. Phone reconnects and problem re-occurs.
I found in the wireshark trace that the handset identifies it self as ext# @ IP address : Port. i.e.
[email protected]:5060. receives Status: 200 OK.
At other times the handset ID is necsipuser @ IPLA IP address: port.
i.e.
[email protected]:5081. This request is then refused. Status 401: Unautorised and Phone displays, SIP SERVER not found.
I can still ping the IPLA from the handset and can access phone setup via web browser, but handset will not register and subscribe to SIP server.
Anybody seen this before or any ideas how to get around this. I have upped Keep alive values 84-15-03/04 with no difference.
Thank You in advance.
Jahn