B at teh end typically is for AnnexB (nor rev,.B)., The second modem version is v2. The problem about DSL connection most of time are out of the modem.

If you can try to replace standard power suppòly with a 12V 1.5A. Then re-set Wifi to g/n.

Try to make a simple test if you have another power supply (12V DC 1.5A - important 1.5A). We had some similar problems in Italy and we fixed it with a power supply with more current (1.5A) than...

Please try as sugegsted to replace the original power supply with a new one with more A (ex. 12V 1.5A). We solved in Italy many probelm like yours in this way. If also with new power supply you will...

Did you test wiuth a different power supply of 2A?

This firmware have the same bug reported but not fixed And some improvements requested not implemented Bug - Telnet infinite loop You can enter in telnet mode. But you cannot exit by it. logout or...