... European Telecommunication Standards Institute (ETSI), and EIA-TIA are only a few of the standards bodies you might be familiar with. One key component of having a standards- based packet infrastructure ... ability to have open standards to layers at the call-control layer. Referring to Figure 1-12, these open standards are provided by protocols such as H.323, SGCP, MGCP, SIP, and so on, which have ... covers how they are maintained and deployed. • In late 1998, the IETF put IPDC and SGCP in a room and out popped MGCP. MGCP is basically SGCP with a few additions for OAM&P. MGCP is covered...