> If someone would like to search for differences on the pcb, I can make photos > of both pcbs.
Please do, it might be interesting. Also, if they are not identical (except for ADSL annex) it might be very difficult to find relevant differences. It sort of does not make sense to me that the only difference hardware-wise would be pcb jumper. You would think that company like TP-Link is trying very hard to save money where they can. They already have different firmware for "B" versions (W8970B W8980B) so why not use some spare GPIO to pull front-end configuration pin to state in which it has to be (if this is really whats happening). You might say that it's protection against cross flashing firmware from the other model but it is already possible to crossflash W8980 to W9980 without any hardware changes. Why not protect against that? Another theory is that Lantiq might be enforcing such implementation on manufacturers but it is also unlikely for me. All the other settings seem to be changed only by firmware updates. Why not this one? https://en.wikipedia.org/wiki/Asymmetric_digital_subscriber_line#/media/File:ADSL_annex_overview.svg Looking at this graph it seems plausible that there is some kind of additional high-pass filter before front-end or entirely different chip adapted to upstream transmission on slightly higher frequency for Annex B. However, w8970 in my country is advertised as supporting ALL BUT Annex B in this graph and thus needs to cover full bandwidth. _______________________________________________ openwrt-devel mailing list openwrt-devel@lists.openwrt.org https://lists.openwrt.org/cgi-bin/mailman/listinfo/openwrt-devel
