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Recording Cable

Recording Cable

(OP)
Hi, I need to make a cable that will allow me to record a telephone call..

would it be possible to make a cable with rj11 pins 1+5 to a 3.5mm jack, insert that into a audio recorder with auto start.. so when a call is incoming, and the recorder senses data, it begins to record..

is this possible.. ??

Many Thanks
Yurov Ardyy

RE: Recording Cable

Before going too much further, please check the laws, for your area, that govern recording telephone calls. If you are located in the US, laws vary widely from state-to-state.

How you would go about connecting a device to record calls depends on the set-up. For example,
are you trying to record from a standard POTs line or an extension off of a digital key system/PBX?

I love2 "FEATURE 00"

RE: Recording Cable

(OP)
Hi, Thanks for the reply, its just a standard analogue POTS line. It is in the UK, and i have our admin looking into the legalities of it..

 

Many Thanks
Yurov Ardyy

RE: Recording Cable

Here in the U.S., several companies sell a device that will do this. Try Radio Shack or MCMelectronics.  

Iolair MacWalter
Network Engineer

RE: Recording Cable

(OP)
Hi,

Not sure if the US version will work here in the UK, but will make enquiries. Thanks again.  

Many Thanks
Yurov Ardyy

RE: Recording Cable

"is this possible.. ??"

Not the way you are trying to do it. Due to voltage and impedance mismatches you can't simply run a phone pair into a recorder and get decent audio. For auto start/stop you need to detect the on-hook and off-hook voltages and fire a relay.

Quite a few vendors have a box to do this:
http://www.securityhardwarestore.com/personal-security/audio-recorders/kjb-security-dr003-mini-telephone-recorder-pro
http://www.securityhardwarestore.com/personal-security/audio-recorders/kjb-security-trx-20-telephone-recording-interface
http://www.telephonecallrecorder.com/gttr510sc-cassette-phone-recorder-p-39.html

Or build your own:
http://www.epanorama.net/documents/telecom/telerecord.html
http://www.engadget.com/2005/09/27/how-to-build-a-telephone-recording-circuit-from-an-old-modem/
http://www.solorb.com/elect/phone/tap/

As to legal issues, that is you to you. Be careful!

 

RE: Recording Cable

(OP)
Thanks for that the first item on the list looks pretty good, will test it out..

 

Many Thanks
Yurov Ardyy

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