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fredmart
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Joined: Tue Jan 05, 2021 10:33 pm

VOIP SIP Call disconect after 15 minutes

Tue Jan 05, 2021 11:01 pm

Hi Everyone.

I've installed a IP PBX at a customer location and they use a Mikrotik Router. It's new to me, and network wise, I mostly know Cisco, a bit of pfsense and a bit of FortiGate.

We can't place or receive call that will last more than 16 minutes 39 seconds. Every time.

My SIP provider told me to disable sip ALG. I googled and found that I have to go in IP / Firewall / Service Port and then disable SIP. Is that the right way ? Could not find more info.

After some other reseach I found that it could be a sip refresh timeout but I can't find where to look.

Any help would be gladly appreciated.

Thanks
 
ak4020
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Joined: Mon Mar 23, 2020 11:35 am

Re: VOIP SIP Call disconect after 15 minutes

Wed Jan 06, 2021 4:25 pm

hi, yes that was correct and the sip alg is the sip refresh timeout, I'd times debugging on the pbx should there still be problems. br
 
fredmart
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Re: VOIP SIP Call disconect after 15 minutes

Wed Jan 06, 2021 6:08 pm

Thanks for your reply,
I will try so swap the router for another brand and see if I get the same result, then I will investigate on the PBX itself.
 
ak4020
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Joined: Mon Mar 23, 2020 11:35 am

Re: VOIP SIP Call disconect after 15 minutes

Wed Jan 06, 2021 7:49 pm

am convinced that it is a pbx or sip provider problem, have many years of experience with it myself, please keep me running
 
jkyawesome
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Joined: Mon Sep 17, 2018 12:34 am

Re: VOIP SIP Call disconect after 15 minutes

Mon Jan 11, 2021 7:28 pm

Remember any changes to sip service in firewall requires reboot.

https://mum.mikrotik.com/presentations/ ... 084451.pdf

https://www.youtube.com/watch?v=tM7wyKdnIKA

This mum presentation explains Mikrotik Sip Helper
 
vinu
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Joined: Sun Mar 05, 2017 8:09 pm
Location: India

Re: VOIP SIP Call disconect after 15 minutes

Mon Jan 11, 2021 10:06 pm

Hi,
i faced the same issue even i did disable the SIP alg in service port.
upto my knowledge its is double nating both by ipbx and also by router
disabling the SIP ALG does the trick for me.
Its working fine for past three months although i didn't get a answer for my thread
Remember always reboot the router after disabling SIP ALG.

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