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Definition of "Off-Premises Extension" |
An extension telephone, PBX station, or key system station located on property that is not contiguous with that on which the main telephone, PBX, or key system is located. Like a party line, an OPX is a line that serves more than one subscriber location. / Binary coded decimal is a system of writing numerals that assigns a four-digit binary code to each digit 0 through 9 in a decimal numeral. |
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