network failure and then phone de registers

[eman]

Good day,

can you please kindly assist I'm having this issue where now and then the extension I have registered would say, the extension XXX is currently unavailable, please try again later. Whilst on fusion, it shows it is registered and can make outbound calls, and then after a while, the outbound will say network failure I have also disabled SIP ALG; it's just now and then. I'm really not sure what is causing this problem.

 

[pbxgeek]

Try enabling Keep Alive on your device and reduce registration timeout to a shorter number. You issue sounds like firewall closes the connection too early.