BNC to RJ45 Tap

[biglebowski]

Does anyone know of a unit that will allow a passive tap of a BNC E1 trunk. It would need 4x BNC inputs and 1x RJ45 output, i.e

4x BNC inputs
Tx in
Tx out
Rx in
Rx out

 

[SYQUEST]

How do you expect to get a digital signal fron an RJ45 wiring arrangement for an analogue line?

An RJ45 wiring arrangement on an 8 Position Modular Jack is for Tip/Ring dialtone on pins 4 & 5 with a programming resistor on pins 7 & 8.

This is more misuse of the RJ designation!

Are you trying to do "drop/insert" of E1 channels?

....JIM....

 

[biglebowski]

I never mentioned analogue.

It's an E1 circuit with BNC connections.

This is more misuse of the ability to read.

 

[SYQUEST]

If RJ45 is not analogue, then you need to define or clarify what this is: "1x RJ45 output, i.e" from your original post.


....JIM....

 

[mattKnight]

E1 ISDN (a digital circuit) can be presented in 2 ways

a pair of BNC connectors (One for Tx one for Rx)
or
a "RJ45" connector with a pair used for Tx and a pair for Rx (off the top of my head I can't remember what the pin outs are)

What Biglebowski is after is the ability to tap into an E1 circuit, which is presented on the NTE (and I assume to the CPE / PABX) on BNC connectors and present the E1 to a third device which has an ISDN presentation on RJ45 sockets.

I have had to do this before, particularly with trunk side recording devices. The key phrase is passive tap

Perhaps a quick check of Biglebowski's profile might have given you a clue that this isn't a stupid question

Biglebowski - sorry I don't have source - the systems I maintained used horrific wiring bodges more often than not. (usually involving twisted wires and insulation tape) Urrrghhh

You can get single baluns (

http://www.mcmelectronics.com/content/ProductData/Manuals/50-7716.pdf)

and use BNC Tee pieces. It isn't as neat as what you want - but your requirements are very specific

Take Care

Matt
I have always wished that my computer would be as easy to use as my telephone.
My wish has come true. I no longer know how to use my telephone.

 

[libellis]

Either of the two passive taps in the following used in conjunction with appropriate adapter cables/baluns might be what you're looking for.

http://www.datacomsystems.com/products/network-taps.asp?cat=5

If you use the T1/E1 tap then you'll need two BNC to RJ45 adapter cables/baluns, but if you use the DS3/E3 tap (should be okay for E1), then you'll only need one.

This is just a sampling - there are a lot of adapters cables/baluns out there.

http://www.mce.com/shop/product_detail/product_id/23234/category_id/1718

http://datainterfaces.com/Balun-PS-dual_BNC-RJ45_RJ48c-1.aspx

http://www.etslan.com/CarrierTelecom.htm