HI all,

I have PCM cable or E1 cable

how I can make testing for its ohm bu ahmmeter

is there any way

many thanks for all

Hani

 

I can't decipher your question.

Are you trying to find the current handling ability of a wire?

The resistance of a wire?

 

Hi,

many thanks for your reply

as you know E1 cable(pcm) is 120ohm and network cables is 50 to 60 ohm

so now i don't know exactly what is meaning by this ohm? and how i can find out this ohm by ohmmeter

thanks again
hani

 

Are you familiar with coaxial cables? - http://en.wikipedia.org/wiki/Coaxial_cable

Here is a link to coaxial cable impedance - http://www.epanorama.net/documents/wiring/cable_impedance.html

 

Hi,

many thanks

PCM cables are totaly different it not coaxial cable

Hani

 

Hello,

Take a look at the attached PDF.
It is a lecture note.

Bertus

 

The "Ohm" of the cable is the characteristic impedance. The CSU/DSU and Telco Demarc handle the "Electrical termination" for you, so you only need to use cable that is within the specification.

As you mention E1 vs. T1 or DS1, I assume you are non-US? Are you trying to use a different connector cable for the E1?