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Question

SIP KEEP ALIVE

Forum|Forum|4 years ago
November 6, 2021
4 replies
6143 views

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 settings

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

set sip-helper enable

end

MikhailB

New Member

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/

TP999Author

New Member

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 settings

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

end

MikhailB

New Member

Hi

Thats work for me:

Disable SIP ALG:

config system settings

set sip-helper disable

set sip-nat-trace disable

end

reboot the device

config system session-helper

show

I sow:

edit 13(or 12)

set name sip

set protocol 17

set port 5060

And delete it:

delete 13(or 12)

Change the default –voip –alg-mode

config system settings

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

end

TP999Author

New Member

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

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