CSIM 01 Siemens Dect/GSM Cable: Easy disconnect with 20cm cable to Siemens specific plug. To be used when converting the office headset for use with GSM: SX1, SL65, SL55, S65, S55, MC60, M65, M55, CX65, CFX65, CF62, C65, C60, C55, A65. Dect: Gigaset SL1/SL 100