Toshiba CRCU4 4-Circuit DTMF Card (Refurbished)Toshiba 4 Circuit DTMF Card More Information: Mnfr. Part #: CRCU4 Provides 4 DTMF circuits for connection of standard telephones Provides Direct Inward System Access (DISA) lines Provides Direct Inward Station calling lines Tie lines and voice mail devices. One per system is required Mounts on PCTU 1 2 3 or 4 Compatible with DK56 DK 96 KSU. Condition: Refurbished