i have an issue with my voip system. it does not allow me to answer incoming calls .the phone is ringing but when pick it up it's dead. at the moment i have a Netgear router , ports 5060 and 10000-20000 are open .
there are few thing i did so far like turning off SIP ALG on the router and also reducing expiry time to 2 minutes ,but to no avail .
i also did following setting as NAT setting
Nat mapping enable:yes
keep NAT aliv enable:yes
Handle VIA received:yes
Insert VIA received:yes
Handle VIA rport:yes
Insert VIA rport:yes
Send Resp to Src port:yes
any thing else i can do to solve this out ?
Thanks,