Multiplexer is applicable in VoIP gateway to keyset, IP transport and Telco transport. It provides a transparent means to connect up to 12 digital keysets via a T1, E1, J1, or Ethernet interface. It can be used as a keyset distribution point within facility or across the world. For each iKTMX co-located with the central conference switch, up to 3 iKTMX’s can be located at sites remote from the switch. It supports all digital keysets.