V7122 Gateway User Guide 319Figure 97 ini File Example for TDM Tunneling (Terminating Side);E1_TRANSPARENT_31ProtocolType_0 = 5ProtocolType_1 = 5ProtocolType_2 = 5ProtocolType_3 = 5; Channel selection by Phone numberChannelSelectMode = 0TrunkGroup = 0/1-31,1000,1TrunkGroup = 1/1-31,2000,1TrunkGroup = 2/1-31,3000,1TrunkGroup = 3/1-31,4000,1TrunkGroup = 0/16-16,7000,2TrunkGroup = 1/16-16,7001,2TrunkGroup = 2/16-16,7002,2TrunkGroup = 3/16-16,7003,2CoderName = 'g7231'CoderName = 'Transparent'CoderName_1 = 'g7231'CoderName_2 = 'Transparent'TelProfile_1 = voice,$$,1,$$,$$,$$,$$,$$,$$,$$TelProfile_2 = data,$$,2,$$,$$,$$,$$,$$,$$,$$SS7 TunnelingThe Signaling System 7 (SS7) tunneling feature facilitates peer-to-peer transport of SS7 linksbetween gateways that support 3Com' unique MTP2 (Message Transfer Part) Tunnelingapplication (M2TN) for transferring SS7 MTP2 link data over IP. In this scenario, both sidesof the link are pure TDM switches and are unaware of the IP tandem that is utilized betweenthem. Using M2TN, the network operator can support SS7 connections over IP, carryingMTP level 3, as well as higher level SS7 layers (for example, user parts and applicationprotocols, such as TUP (Telephone User Part), Integrated ISUP (Services User Part), SCCP(Signaling Connection Control Part), TCAP (Transaction Capabilities Application Part)).M2TN uses standard protocols, such as SIGTRAN (RFC 2719 Architectural Framework forSignaling Transport), SCTP (RFC 2960, Stream Control Transmission Protocol), M2UA(RFC 3331, MTP2 User Adaptation Layer), the latter being used for transporting SS7-MTP2signaling information over IP. M2UA architecture is shown in Figure 98. M2TN architecture isshown in Figure 99.
