Term G-I


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  Step 1:  Gateway

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Gateway is the original Internet term for what is now called router or more precisely, IP router. Gateway refers to systems that translate from one native format to another.
  Step 2:  H.320

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H. 320 is a recommendation of the ITU-T based on Discrete Cosine Transform, CCM and motion compensation techniques. It can be a video system's sole compression method or supplementary algorithm, used instead of a proprietary algorithm when two dissimilar codecs need to interoperate. H.320 includes a number of individual recommendations for coding, framing, signaling and establishing connections. It also includes three audio algorithms, G.721, G.722 and G.728.
  Step 3:  Handshake

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A handshake is the electrical exchange of predetermined signals by devices wishing to set up a connection. Once a handshake is completed the transmission begins. Handshakes are used in video communications by codecs wishing to interoperate whereby they seek out a common algorithm.
  Step 4:  ISDN

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ISDN stands for Integrated Services Digital Network. ISDN is a set of protocol and interface standards that effectively constitute an integrated (voice, video, and data) telephone "network." These standards promote global availability and compatibility of ISDN products and services.