Cisco 877 cabling

Cisco 877 cabling

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Subject Author Date
Cisco 877 cabling Andre Wisniewski 06-03-2008
---> Re: Cisco 877 cabling Markus Marquard ..06-03-2008
Posted by Andre Wisniewski on June 3, 2008, 2:25 am
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Hi all

I've some questions regarding cabling my Cisco 877 to my DSL line. Router gets
not in
sync whereas my fritz.box is in sync within seconds.

Is it possible to connect my Cisco to my splitter or has it to be connected
directly
to my line?

If it's possible what is the pin layout? In this case i have to use another
cable
than the delivered magenta one. The magenta one has two RJ11 plugs whereas my
splitter has a RJ45 jack.

Thanks in advance

Andre

Pure Networks
Posted by Markus Marquardt on June 3, 2008, 5:15 am
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Andre Wisniewski wrote:
> I've some questions regarding cabling my Cisco 877 to my DSL line.

Are you aware of the fact, that the Cisco 877 has a ADSL over POTS
modem? That means on nearly all lines in Germany it won't work.

For details see:

http://www.cisco.com/en/US/prod/collateral/routers/ps380/ps6200/product_data_sheet0900aecd8028a976.html

Especially:

876: ADSL over ISDN (ADSL2/ADSL2+ Annex B)
877: ADSL over analog telephone lines (ADSL2/ADSL2+ Annex A and Annex M)

Even if you have only an analog line, the Annex B is used in Germany.

> Is it possible to connect my Cisco to my splitter or has it to be
> connected directly to my line?

You have to connect the Cisco router to the splitter.

> If it's possible what is the pin layout? In this case i have to use

Only the inner two pins are used. If you use the RJ11 cable, it should
work as the other pins are unused anyway.

With kind regards
Markus

Posted by Andre Wisniewski on June 3, 2008, 8:32 am
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Markus Marquardt wrote:
> Andre Wisniewski wrote:
>> I've some questions regarding cabling my Cisco 877 to my DSL line.
>
> Are you aware of the fact, that the Cisco 877 has a ADSL over POTS
> modem? That means on nearly all lines in Germany it won't work.
>
> For details see:
>
>
http://www.cisco.com/en/US/prod/collateral/routers/ps380/ps6200/product_data_sheet0900aecd8028a976.html
>
>
> Especially:
>
> 876: ADSL over ISDN (ADSL2/ADSL2+ Annex B)
> 877: ADSL over analog telephone lines (ADSL2/ADSL2+ Annex A and Annex M)
>
> Even if you have only an analog line, the Annex B is used in Germany.
>

So, i have to use 876 instead of 877 even though i have an analog line?

>> Is it possible to connect my Cisco to my splitter or has it to be
>> connected directly to my line?
>
> You have to connect the Cisco router to the splitter.
>

Thought so.

>> If it's possible what is the pin layout? In this case i have to use
>
> Only the inner two pins are used. If you use the RJ11 cable, it should
> work as the other pins are unused anyway.
>

I was right with that, too.

> With kind regards
> Markus

Posted by Markus Marquardt on June 3, 2008, 10:18 am
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Andre Wisniewski wrote:
>> 876: ADSL over ISDN (ADSL2/ADSL2+ Annex B)
>> 877: ADSL over analog telephone lines (ADSL2/ADSL2+ Annex A and Annex M)
>
> So, i have to use 876 instead of 877 even though i have an analog line?

Yes, i think so. You could check which standard is used by the Fritzbox
which works (maybe there's a label or something on it) - i guess it is
Annex B (ADSL over ISDN). If so, the Cisco device must be the same type
- in your case the 876.

With kind regards
Markus

Posted by Markus Marquardt on June 3, 2008, 10:26 am
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Markus Marquardt wrote:
> Andre Wisniewski wrote:
>>> 876: ADSL over ISDN (ADSL2/ADSL2+ Annex B)
>>> 877: ADSL over analog telephone lines (ADSL2/ADSL2+ Annex A and Annex M)
>>
>> So, i have to use 876 instead of 877 even though i have an analog line?
>
> Yes, i think so. You could check which standard is used by the Fritzbox
> which works (maybe there's a label or something on it) - i guess it is
> Annex B (ADSL over ISDN). If so, the Cisco device must be the same type
> - in your case the 876.

Just an addition, please see

http://de.wikipedia.org/wiki/Annex_A

Especially the text related to "Verbreitung":

Germany is the only country where only Annex B is used - regardless if
you have an ISDN or analog line.

With kind regards
Markus

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