A very convenient series of adapters that permit a single line telephone set, answering device, auto-dialer or other ancillary equipment to be connected to an existing 25-pair ribbon connector.The jacks on all units is 4-conductor except the AT153AM-06 which is 6-conductor. AT153AM Features: Each unit consists of a grey plastic housing equipped with 6-position modular jack and a male 50-pin connector Jacks on all units are 4-conductor except the AT153AM-06 which is 6-conductor Allows a single line telephone set, answering device, auto dialer or other ancillary equipment to be connected to an existing 25 pair connector UL listed and CSA listed Part Number Connection Code AT153AM-01 26 27 1 2 AT153AM-02 23 24 48 49 AT153AM-03 50 49 25 24 AT153AM-05 1 2 26 27 AT153AM-06 26 27 1 2 50 25