[c-nsp] improving last-mile VDSL2 circuit between two Cisco routers

[Martin T]

Walter,
thanks for reply! As I made the connectors as good as I could, I think
I have no other options left other than increase the diameter of the
wire. At least it's worth a try. In addition, aren't there some sort
of amplifiers in use for DSL?

regards,
martin


2011/6/17 Walter Keen <walter.keen at rainierconnect.net>:
> Because you are essential increasing the gauge of wire, and therefore
> decreasing the resistance, you *should* have less loss.  Telco's have used
> this in the past to extend DSL beyond the distance limitations before,
> (although not common, each pair in the ground is not a cheap commodity)
>
> If they're in the same cable, or cable group, it's worth a try.  If they
> take different physical paths it may still work, but the capacitance of the
> overall link will have some odd effects.
>
> In theory, it should work, and raise your SNR, (and therefore some more
> potential speed, if it becomes good enough)
>
>
> -----Original Message-----
> From: cisco-nsp-bounces at puck.nether.net on behalf of Martin T
> Sent: Thu 6/16/2011 3:43 PM
> To: cisco-nsp at puck.nether.net
>
>
> Subject: [c-nsp] improving last-mile VDSL2 circuit between two Cisco routers
>
> I have connected two Cisco 1841 routers over poor quality POTS cabling
> using the "Ethernet over VDSL2"(profile 17a) converters. SNR is rather
> low and distance is long. Currently I have two POTS wires in use, but
> I could use another pair as well if this would help. I was wondering
> maybe it would help somehow if I use two pairs instead of one pair
> like illustrated here:
> http://img98.imageshack.us/img98/4020/vdsl2w.png
>
> I would for example solder the additional wires to main ones just
> before the RJ14 connecto. I know the VDSL2 converters link this way,
> but would it give some additional improvement? If yes, then why?
>
> regards,
> martin
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