Network modules 25Bus functionsThe MS bus supplies system messaging, allowing system peripherals andprocessors connected to the MS bus ports to communicate freely with oneanother.The MS bus consists of the following:• processor bus• transaction bus• control processor with supporting memory• mapper• processor transaction bus interface• system clock• port interface unitsLink functionsThe link is the software and protocol structure used on signaling linksfor SuperNode and SuperNode SE applications that interface with thetelecommunications network. The link enables the networking of SuperNodesystems, SuperNode SE systems and interfaces for customer programmingapplications. The link delivers a range of network signaling services basedon public standards.Protocol sets within the link include the Common Channel Signaling #7(CCS7) set for the following:• transaction and trunk signaling• Integrated Services Digital Network (ISDN) access• network operations protocols• X.25 packet communicationsThe link also supports the DMS packet handler, which provides nationalISDN-1 compliant packet service. DMS packet handler signaling includesthe following:• X.25 and X.75/X.75’ protocols for packet processing• ISDN Basic Rate Interface (BRI) accessNetwork modulesThe Network Module (NM) is one of the main functional components of theMeridian SL-100 that connects to the MS bus. Figure 7 "Functional areas ofthe Meridian SL-100 network module (ENET)" (page 26) is an illustrationof the NM using the Enhanced Network (ENET).Communication Server 2100Meridian SL-100 Product Guide555-4001-103 20.01 StandardSE09 20 October 2006Copyright © 2006, Nortel Networks Nortel Networks Confidential.
