[c-nsp] Combine two 2-wire DSL

[Tony]

Hi Pavel,

If you have a 4-wire capable card and the port on the dslam end is 4-wire then it is configured the same as 2-wire but you need to tell your router to use 4-wire mode. The 4 wires (two pair) are used at the DSL layer, not layer 3.

I don't know about a card in an 1841, but in an 878 (fixed chassis SHDSL) it is configured like this (real config from live/working router):

controller DSL 0
 mode atm
 line-mode 4-wire enhanced
 dsl-mode shdsl symmetric annex B
 line-rate 4096

Then you configure all the rest the same as a "normal" 2-wire service (no multilink, multiple PVC's, or anything more complex). When it negotiates the SHDSL with the DSLAM, it will use all four wires for the DSL "session" and should get the higher speed.


regards,
Tony.







>________________________________
> From: Pavel Dimow <paveldimow at gmail.com>
>To: Tony <td_miles at yahoo.com> 
>Cc: "cisco-nsp at puck.nether.net" <cisco-nsp at puck.nether.net> 
>Sent: Tuesday, 4 June 2013 7:58 PM
>Subject: Re: Combine two 2-wire DSL
> 
>
>
>Yes the circuit in question is SDSL. Is there any other special requirements? The ISP does support 4-wire mode but I don't understand should I create one or two pvc's and how to combine them via multilink or virtual-template. I tried both and I always get 2304 speed instead of 4608 
>
>On Tuesday, June 4, 2013, Tony  wrote:
>
>It requires the other end (exchange end) to be plugged into an equivalent type card on the dslam that can combine the 4-wires into a single service.
>>
>>
>>Can you even do ADSL on 4-wire ? I know SHDSL can be done over 4-wire.
>>
>>
>>
>>
>>regards,
>>Tony.
>>
>>
>>
>>
>>>________________________________
>>> From: Pavel Dimow <paveldimow at gmail.com>
>>>To: "cisco-nsp at puck.nether.net" <cisco-nsp at puck.nether.net> 
>>>Sent: Tuesday, 4 June 2013 5:46 AM
>>>Subject: [c-nsp] Combine two 2-wire DSL
>>> 
>>>
>>>Hi,
>>>
>>>is it possible to combine two
 2-wire DSL's into one 4-wire DSL using Cisco
>>>4-wire DSL card on 1841?
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>
>