One way audio in SIP calls via TP Link MR6400

One way audio in SIP calls via TP Link MR6400
One way audio in SIP calls via TP Link MR6400
2019-11-18 17:29:34 - last edited 2019-11-19 08:28:03
Model: TL-MR6400
Hardware Version: V2
Firmware Version: 1.0.19 Build 181219 Rel.59200n

Hi there, I have a new TP Link MR6400 – Sip traffic does not work for my home VPN phone or via soft clients. SIP audio RTP is blocked inbound (people can hear me, I cannot hear them). I have tried to disable SPI, SIP ALG etc… all to no effect. I believe this is a FW bug – please advise if there is a new FW or fix for this.

 

This worked on this carrier with a Huawei B525 with the same SIM and SIP client so this is a router issue.

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Re:One way audio in SIP calls via TP Link MR6400-Solution
2019-11-19 06:09:20 - last edited 2019-11-19 08:28:03

@keanebg1 

 

Below is a beta firmware which you can install it and test whether it works. 

http://support.tp-link.com/f/f04d6c6d36/?dl=1

 

If still the same, you can contact the retailer to change another one with newer hardware version, like V3 or V4.

 

May it help. 

 

 

 

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Re:One way audio in SIP calls via TP Link MR6400-Solution
2019-11-19 06:09:20 - last edited 2019-11-19 08:28:03

@keanebg1 

 

Below is a beta firmware which you can install it and test whether it works. 

http://support.tp-link.com/f/f04d6c6d36/?dl=1

 

If still the same, you can contact the retailer to change another one with newer hardware version, like V3 or V4.

 

May it help. 

 

 

 

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Re:One way audio in SIP calls via TP Link MR6400
2019-11-19 08:28:51

@Kevin_Z  Thank you so much, that appears to work straight away. 

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Re:One way audio in SIP calls via TP Link MR6400
2019-11-20 02:49:15

@keanebg1 

 

Thanks for your reply, glad to hear that it works. 

 

Now you can enjoy the internet and the VOIP service. 

 

If need more help, please let us know. 

 

Best regards 

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Re:One way audio in SIP calls via TP Link MR6400
2020-05-11 14:04:53
Sear Kevin_Z, we have the same problem. is it possible to send use the firmware? Thank a lot
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