Catalog > Consumer Electronics > Security & Alarms > Alarms > Alarm Systems DTMF Radio Interface Plug-In Module DTMF Radio Interface Plug-In Module IDS 860-06-658 IDS DTMF Radio Interface Plug-In Module 216.60 ZAR inc for 1 Each 1 in Stock Add Specifications, Prices & Availability may change without notice. Images are for illustration purposes only. E&OE Overview The IDS DTMF Radio Interface module is a stackable board for the new generation IDS alarm system. The IDS DTMF Radio Interface module communicates to other DTMF communication devices that transmit signals from the alarm system to the security companies control room, via DTMF tones.