OfficeServ 7100 SPECIAL APPLICATIONSTECHNICAL MANUAL PART 2 JANUARY 20092.6.10OfficeServ 7400 MGI Functional OverviewMGI Operational ConceptsThe MGI supports several VoIP services. In supporting multiple services the MGI portsare capable of using different protocols (IE Proprietary, SIP or H.323) automatically ona per port basis as needed. This allows the mixing of different standards on the sameMGI card(s).In certain applications there may be a need to separate or segregate the card(s) forspecific uses. An example of this is where there are two MGI cards mounted and onecard is used exclusively as a VoIP trunk gateway and the second card is used tosupport ITP keyphones. In this case each card can be defined as to what service it willprovide. IE. VoIP trunking gateway use or ITP keyphone use. In another case, wherethe MGI has 16 VoIP channels, it is possible to segregate or partition some of thesechannels for ITP keyphones and use the remaining channels for trunking gateway useon the same card.In order to understand the task of segregating MGI cards for traffic or grading purposesthe following is a brief description of the multiple uses of an MGI card. MMC 615: MGIGroup allows separation of these services. By default all MGI ports are available for allservices.MGI ServicesEach of the MGI services provide for private network and public network exposure. Thisallows connectivity to the public Internet without exposing the private network. Thisallows router traversal by remote ITP keysets and far end gateway services andsystems. Public network and Private network relationships will be reviewed further on inthis Special Applications section.H.323 Trunking GatewayThe MGI card(s) when used as a VoIP trunking gateway allows VoIP call connectivity toopposite MGI’s, or other H.323 standards based VoIP gateways. Calls placed in thismode are treated like IP tie line trunk calls. As a tie line type trunk, incoming digits areexpected. Programming allows routing of incoming calls based on incoming digits,digit translation or trunk ring destinations. Outgoing calls are made by selecting thetrunk or trunk group and dialing the appropriate digits to reach a predetermineddestination. The flexible programming allows outgoing digit manipulation with LCR likerouting.