Credit card machines

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 Question by David Blair posted 07 Feb 2006
 Credit card machines
I have a rj-45 phone connection and need a standard rj-11 line into my Credit Card machine. Is there a connector or special line that I can get to make this work?
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 Answer by Joseph Golan posted 07 Feb 2006
Dear David,

Most credit card machines work like a dial-up modem and therefore require only an analog line or otherwise known as a POTS circuit (POTS=Plain Old Telephone service).

If your POTS line is being delivered to this jack then there should not be a problem as pair 1 of the 8 pin modular jack (incorrectly referred to as an RJ-45) will line up with pair 1 on the RJ-11 of the credit card machine. Use the RJ-11 to RJ-11 cord that came with the machine.

If the line is not a POTS but is analog being delivered behind a PBX then the default number that the credit card machine dial must include the access code (typically 9) and maybe even a "," following the 9 if there is a delay of the second dial tone, The comma acts as a timed pause in the dialing sequence.

If the line is digital (like from a PBX) then you are out of luck and may even cause damage to the credit card circuitry.

Sincerely,
Joseph Golan, RCDD

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