SIP KEEP ALIVE

[TP999]

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

[MikhailB]

HI TP999

SIP helpers do not help SIP:) We use 3CX. I've got the same problem after update FG to 7.0.1. For me, worked:

1) Downgrade to 6.48 (or update to 7.0.2)

2) Recommendations from: https://www.3cx.com/docs/...irewall-configuration/

[TP999]

MikhailB wrote:

HI TP999

SIP helpers do not help SIP:) We use 3CX. I've got the same problem after update FG to 7.0.1. For me, worked:

1) Downgrade to 6.48 (or update to 7.0.2)

2) Recommendations from: https://www.3cx.com/docs/...irewall-configuration/

Hi thank you for your reply so in essence you disabled both SIP ALG and sip helper.

does not changing this command not change it from SIP helper to SIP ALG ?

Run the following commands: config system settingsset default-voip-alg-mode kernel-helper basedend

[MikhailB]

Hi

Thats work for me:

Disable SIP ALG:

config system settings

    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 

[TP999]

hi MikhailB

To clarify and Disable SIP ALG:

enter:

config system settings

set sip-helper disable 

set sip-nat-trace disable end reboot the device

log back on

config system session-helper show 

show:edit 13(or 12)set name sipset protocol 17set port 5060And delete it:delete 13(or 12)Change the default –voip –alg-mode

config system settings   

set default-voip-alg-mode kernel-helper based end 

is this correct to keep alive my SIP trunks

thank you