Hi I have currently deployed a new voice solution (Alcatel pbx) on site with VPN phones and local IP sets.
We have connected GAMMA SIP trunks and can make and receive calls no problem in busy periods of the day. The issue we have if no traffic (calls) are made for say 10-15 minutes the incoming and outgoing calls stop routing to the PBX. We have to make a call in and try and make a call out (unsucessfully inititally) then the traffic starts to flow again.
We have the relevant ports open (5060 & media ports)
initially we had one way audio and the only other setting we have changed is to enable the sip helper.
Can anyone assist please.
config system settingsset default-voip-alg-mode kernel-helper-basedset sip-helper enableend
set sip-helper disable set sip-nat-trace disableendreboot the deviceconfig system session-helpershowI sow:edit 13(or 12)set name sipset protocol 17set port 5060And delete it:delete 13(or 12)Change the default –voip –alg-modeconfig system settings set default-voip-alg-mode kernel-helper basedend
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