When your business expands, more users and concurrent calls can be added easily to meet growing business needs through the telephony cards in the IP PBX.
C-DTU, E1/TI telephony cards for European and North American Terms, can be flexibly configured in a PBX-C302 to expand its functionality, it supports 1 E1/T1 per board and any two boards of the same series can be mixed according to your specific needs.