TL-ER6120 VOIP / SIP Problem

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TL-ER6120 VOIP / SIP Problem

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mike366

2013-09-17 06:00:30 - last edited 2021-08-21 04:09:07

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TL-ER6120 VOIP / SIP Problem

2013-09-17 06:00:30 - last edited 2021-08-21 04:09:07

Region : UnitedStates

Model : TL-ER6120

Hardware Version : V1

Firmware Version :

ISP :

(1) The router translates the external standard VOIP port of 5060 to something like 25593. It clearly leaves the internal PBX as 5060, but by the time it gets to the SIP provider, it has been translated; this is happening in the router. This non-standard port is causing dropped and runaway calls. SIP-ALG is disabled. What is up with that and how do I fix it? I need the external port to be 5060, no translation at the SIP provider. It is NOT Time Warner causing the issue.

(2) How do I increase any UDP timeout value in the router?

Thanks.

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civic

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2013-12-05 17:10:44 - last edited 2021-08-21 04:09:07

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Re:TL-ER6120 VOIP / SIP Problem

2013-12-05 17:10:44 - last edited 2021-08-21 04:09:07

(1) you should turn the SIP ALG on
(2) that value is unchangable.

sylvanas

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2014-07-23 08:53:02 - last edited 2021-08-21 04:09:07

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Re:TL-ER6120 VOIP / SIP Problem

2014-07-23 08:53:02 - last edited 2021-08-21 04:09:07

Hi Mike,

As I know, this router will translate the source port of an outgoing packet for some safety consideration.
And this behavior can't be changed.
Also, symmetric NAT is built on this router (more safety than cone NAT),
so you will need SIP ALG in generally.

Obviously, there isn't a switch to change the value of UDP timeout, It can't be changed, I think.
I'm curiously why you need to change this value?

mike366 wrote

Region : UnitedStates

Model : TL-ER6120

Hardware Version : V1

Firmware Version :

ISP :

(1) The router translates the external standard VOIP port of 5060 to something like 25593. It clearly leaves the internal PBX as 5060, but by the time it gets to the SIP provider, it has been translated; this is happening in the router. This non-standard port is causing dropped and runaway calls. SIP-ALG is disabled. What is up with that and how do I fix it? I need the external port to be 5060, no translation at the SIP provider. It is NOT Time Warner causing the issue.

(2) How do I increase any UDP timeout value in the router?

Thanks.

TL-ER6120 VOIP / SIP Problem

TL-ER6120 VOIP / SIP Problem

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