The Toshiba Strata REMU1A is a 4-circuit analog Tie Line Interface Unit.
The Toshiba REMU1A requires the Toshiba ARCS on the CTX100, the K5RCU2 on the DK40i and BRCS on the DK424i DTMF operation, and requires the RRCS on the DK424.

Two Year Warranty