Duplex Repeater Interface Cable For Motorola CDM750 1250 1550 PM400 GM SERIES
For Motorola CDM750, CDM1250, CDM1550, (CDM series plug into the center 16 pin of the 20 pin jack). 1 x Duplex Repeater Interface Cable. For Motorola CM300, CM200 CM series, (must use 2 CM series models.).