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MTA(Media Terminal Adapter) is a cable client device that contains a subscriber-side interface to the subscriber’s CPE (e.g., telephone) and a network-side signalling interface to call control elements in the network. It can deliver Home Phone service in addition to High Speed Internet with battery back up in the event of power outage. It provides codecs and all signalling and encapsulation functions required for media transport and call signalling.
Cable MTAs are required to support the Network Call Signalling (NCS) protocol. An embedded MTA (e-MTA) is a single hardware device that incorporates a DOCSIS cable modem as well as a Cable MTA component.
Majority of the functionality for this component is provided by OEM.