From: Anthony Pace (anthonypace@fastmail.fm)
Date: Thu May 12 2005 - 16:10:41 GMT-3
Scott,
This is very good information. Where can I learn more about it?
ok. So people have come to believe T1=good DSL=flakey and opted for the
old tried and true 4 wires delieverd by the ILEC, with many repeaters
along the path; rather than gamble on DLS delievered by the CLECS. BUT
now the smartjack accepts the 4 wires comming from my router interface
and converts it to DSL so that it can be transmitted on 2 wires - and
then does the same conversion at the other end of the circuit (keeping
the entire process transparent to me)
Anthony Pace
On Wed, 11 May 2005 18:30:40 -0400, "Scott Morris" <swm@emanon.com>
said:
> A T-1 is 2-pair or 4 wires.
>
> However, many of the smartjacks are now HDSL capable (or VDSL depending
> on
> proximity to CO) and that is delivered over a single pair or two wires.
>
> The smartjack is doing magical conversion between the two. ;)
>
> HTH,
>
> Scott
>
> -----Original Message-----
> From: nobody@groupstudy.com [mailto:nobody@groupstudy.com] On Behalf Of
> Hogo, Trust
> Sent: Wednesday, May 11, 2005 6:05 PM
> To: Anthony Pace; Group Study
> Subject: RE: T1 delievered on 2 wires or 4???
>
> Hope this might help.
>
> http://www.cisco.com/warp/public/788/products/vwicmf_t1.html
> http://www.cisco.com/warp/public/63/wic-1dsu-t1.html
>
> ------
> HQ
>
>
> -----Original Message-----
> From: nobody@groupstudy.com [mailto:nobody@groupstudy.com] On Behalf Of
> Anthony Pace
> Sent: Wednesday, May 11, 2005 4:50 PM
> To: Group Study
> Subject: T1 delievered on 2 wires or 4???
>
> I recently terminated a T1 and ISDN PRI in a remote location and was able
> to
> see that the TELCO had terminated the T1 using a single pair and the PRI
> using a single pair from the 25 pair bundle coming into the Data Center's
> smart jacks.
>
> I was always under the impression that from the CSU/DSU (in my case it
> was
> built into the router) to the smartjack and subsequently the NI card in
> the
> MPO was 4 wires. 1 pair TX and 1 pair RX.
>
> Maybe between the CSU/DSU and the NI card it's 2 wires and then 4 for the
> distance to the CO? ??? I am confused because I always believed that DSL
> was
> born out of the efforts of finding a single pair alternative to
> T1 technology.
>
> Should PRI and DS1 be 1 pair or 2?
>
> Anthony Pace CCIE 10349
>
> --
> Anthony Pace
> anthonypace@fastmail.fm
>
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-- Anthony Pace anthonypace@fastmail.fm
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