Abstract: An alarm and audit system for use with loop start telephones and with either semi-post-pay or pre-pay operations, and installed as office equipment for tabulating and storing information concerning collections from coin operated pay telephones, so as to ensure optimum collection and as a perceptive alarm against burglaries; utilizing counter means activated by coin tone bursts transmitted over a pair of normal telephone lines; in semi-post-pay phones the tone burst information being conducted directly to memory means; in pre-pay phones the tone burst information being held in abeyance to be released for tabulation in the memory means by a positive voltage applied when collecting coins, or dropped from said abeyance means by a negative voltage applied when returning coins. The tabulation is accumulative in one of two memory means selectively called upon by computer means to produce information for distribution to those concerned with servicing the said pay telephones.

Abstract: An alarm and audit system for use with loop start telephones and with either semi-post-pay or pre-pay operations, and installed as office equipment for tabulating and storing information concerning collections from coin operated pay telephones, so as to ensure optimum collection and as a perceptive alarm against burglaries; utilizing counter means activated by coin tone bursts transmitted over a pair of normal telephone lines; in semi-post-pay phones the tone burst information being conducted directly to memory means; in pre-pay phones the tone burst information being held in abeyance to be released for tabulation in the memory means by a positive voltage applied when collecting coins, or dropped from said abeyance means by a negative voltage applied when returning coins. The tabulation is accumulative in one of two memory means selectively called upon by computer means to produce information for distribution to those concerned with servicing the said pay telephones.