Equipment using Channel Associated Signaling Extension Interface

The Channel Associated Signaling (CAS) extension interface provides a digital connection to external equipment and offers them, through PCM lines, the functionality of analog extensions.

Besides the analog extension functionality, the CAS extension offers the ability to switch data from 64k-bit clear-channel data-interfaces connected to the external equipment. This is applicable, for example where a multiplexer (MUX) is used as a simple remote unit and permits connections from multiplexed data extensions to other MX-ONE data interfaces such as ISDN external lines and Digital Private Network Signaling System.