Thomas Kernen wrote: > Does some have any guidance as to how much S/N margin Swisscom requires > for their BBCS VDSL loops. I have a case where the S/N margin in 22dB on > the downstream and it surprises me the line doesn't train at a higher > rate (current rate is 13264kbps).
The S/N margin is inverse proportional to the link speed. You have 22dB at 13Mb but only 5dB at 30Mb. This is usually a symptom of some cabling problem. You should also check the number of CRC errors you have on the line. VDSL2 is extremely sensitive to in-house wiring. Make sure you run the cable directly from the Swisscom UP to your VDSL modem. If necessary put a fresh U72 cable just for VSDL. Always separate VDSL from any SDSL on the same quad (U72 is not twisted pair but twisted quad). -- Andre > I understand that during the initial setup phase the modem is probed > more or less every 24 hours but doesn't seem to update if the line > characteristics evolve over time. > > If someone can shed some light or provide me with a contact within > Swisscom that actually knows the story behind this I would appreciate it. > > Thanks > Thomas _______________________________________________ swinog mailing list swinog@lists.swinog.ch http://lists.swinog.ch/cgi-bin/mailman/listinfo/swinog
