TD-8840T ADSL Modem / Router SIP NAT problem

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TD-8840T ADSL Modem / Router SIP NAT problem
TD-8840T ADSL Modem / Router SIP NAT problem
2014-03-28 17:41:42
Region : France

Model : TD-8816

Hardware Version : V8

Firmware Version : 4.1 / 0.8.0 / v0007.0 / 130621 Rel 36846n

ISP :


Dear all,

We configured a TP-Link TD-8840T as a ADSL modem router. This line is used for Internet access and VoIP, this site have VoIp phone terminal and the IPBX / TrunkSip was hosted by the ISP. This week, we detected a problem about VoIP phone terminal, they could not be register to the IPBX : the SIP REGISTER request was malformed by the TP Link modem. After have rebooted the modem, all VoIP phone terminal were able to registered correctly to the IPBX ! We found this TP Link FAQ => http://www.tp-link.com/en/article/?faqid=343. But using this MODEM release, the ip command was not found !
Did you have any experience about this problem ? Many thanks about your help.

Kind regards.
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