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cisco vwic card

Posted on 2012-03-30
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Last Modified: 2012-08-14
We are informed that the E1 presentation will be G703. 75 ohm for cisco router... what  network card should be used? I am sure it will not be that connects to RJ48 connector...
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Question by:totaram
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by:TimotiSt
ID: 37791188
According to the datasheet:

http://www.cisco.com/en/US/prod/collateral/routers/ps274/product_data_sheet09186a0080091b9c_ps259_Products_Data_Sheet.html

you might need a CAB-E1-RJ45BNC adapter cable. The module itself supports balanced and unbalanced mode.

Tamas
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by:totaram
ID: 37791706
so, what you are suggesting is one end connecting to BNC from supplier and other end connecting to router via RJ45 (as shown in the attached pitchure) ? I was under the impression that G703 75ohm presentation is via serial interface, with DB connector .. please comment..
cable.jpg
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Expert Comment

by:TimotiSt
ID: 37793186
As I know, the "75Ohm unbalanced" means a  BNC interface. If your telco provides a CSU/DSU unit which converts the E1 into serial, then you'll need a WIC-1T serial card.
You should clarify the interface with your provider, just to be sure that you are talking about the same thing.
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Author Comment

by:totaram
ID: 37794142
Please see the attached picture, it is the picture I took from web and it says that it is serai port and card is G703 75 ohm. It does not have the BNC connector, and this is my main confusion..
G703-75ohm-port-adaptor.jpg
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Expert Comment

by:TimotiSt
ID: 37794653
This looks like a PA-4E1G card, which in fact uses DB-15. We used one of these with a DB-15 - BNC cable with our 7400 series router.
But as far as I know, no VWIC cards use this DB-15 interface anymore, they went with the RJ-48 jack with adaptor cables.
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Author Comment

by:totaram
ID: 37798349
well, we have a requirement to deliver E1, and presentation is G703 75ohm unbalanced... so what I am hearing is that I will need to have bnc to RJ45 cable converter???
please confirm .. Can you provide a picture of it please??

Thanks;
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by:TimotiSt
ID: 37798609
It's like the picture you posted earlier:
http://www.experts-exchange.com/Hardware/Networking_Hardware/Q_27656621.html#a37791706

Just to confirm: what type of router do you use?
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Author Comment

by:totaram
ID: 37799053
OK... basically using RJ45 connection to router from BNC, then really we should not  need a vwic card, since nothing is getting connected to it..

I am getting my CPE concepts lot clearer now...
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TimotiSt earned 500 total points
ID: 37799641
While it uses an RJ-45 style jack, the signals are not ethernet, so you'll need a VWIC card.
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