22 Meridian SL-100 general functionsCoreThere are two Meridian SL-100 core processors currently in the field asfollows:• XA-Core see "XA-Core" (page 27).• Series 70 (BRISC)Note: BRISC is still supported on existing systems, but is no longershipped with new systems.Series 70 Core functionsThe SuperNode and SuperNode SE components are duplicated forreliability and operate as synchronized pairs. One plane is in-service(active) and performs call processing and other operations. The other plane(standby) performs the same operations, but checks for variations betweenitself and the active plane. Any difference between the two planes results ina maintenance interruption and a recovery action.Each plane of the BRISC core consists of the following:• Computing Module (CM)• system memory• System Load Module (SLM)• call management processor• Message Switch (MS) interfacesThe core performs the call processing function, system management,system sanity checking, maintenance, and loading and downloading ofprograms. The core interacts with other components of the Meridian SL-100through the MS bus, which supports multiple application modules.Communication Server 2100Meridian SL-100 Product Guide555-4001-103 20.01 StandardSE09 20 October 2006Copyright © 2006, Nortel Networks Nortel Networks Confidential.
