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

[Walter Keen]

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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