CORRECT TEXT
Fill in the blank with the appropriate term.
A ______________ is a translation device or service that is often controlled by a separate Media
Gateway Controller, which provides the call control and signaling functionality.

Answer: Media gateway

Explanation:
A Media gateway is a translation device or service that converts digital media
streams between disparate telecommunications networks such as PSTN, SS7, Next Generation
Networks (2G, 2.5G and 3G radio access networks) or PBX. Media gateways enable multimedia
communications across Next Generation Networks over multiple transport protocols such as
Asynchronous Transfer Mode (ATM) and Internet Protocol (IP).Because the media gateway
connects different types of networks, one of its main functions is to convert between different
transmission and coding techniques. Media streaming functions such as echo cancellation, DTMF,
and tone sender are also located in the media gateway. Media gateways are often controlled by a
separate Media Gateway Controller, which provides the call control and signaling functionality.