156 OAMP for Meridian SL-100 networksThe objective of automatic trunk testing is to generate sufficient test callsduring low traffic periods so that failures can be detected in the voice or datapath modules, such as Peripheral Modules, Network Modules, facility routes(cable and carrier) and the distant switching system.For more information about trunk maintenance, see the Meridian SL-100Routine Maintenance Procedures.Administration subsystemsThe MAP can also be used in administration modes to perform MeridianSL-100 system management through the following subsystems:• Automatic Message Accounting (AMA)• Station Message Detail Recording (SMDR)• Network Management (NWM)• Operational Measurements (OMs)The data from these sources are filed on magnetic recording devices. Datafrom Automatic Message Accounting, Station Message Detail Recordingand Operational Measurements subsystems is routed to an appropriatedevice (disk or tape) by a software module called the Device IndependentRecording Package (DIRP).Automatic Message AccountingThe AMA subsystem collects the necessary call data and automaticallyrecords it on a data storage device. Periodically this stored data is extractedfrom the data files for retrieval of the information necessary for accountingpurposes, call analysis, or both.Station Message Detail RecordingSMDR records details of billable and non-billable calls for each businessgroup.SMDR is similar to AMA, but operates independently using its own recordingformat. If a Meridian SL-100 is equipped with AMA and SMDR, two recordsare generated: one in AMA format and one in SMDR format.Network managementNWM provides controls that can be applied through the MAP to maintainoptimum transmission capacity and to offset the effects of traffic variationsor component failures. Network management controls are either expansiveor protective as follows:• Expansive controls manipulate routing patterns to use alternatecapacities not normally selected as the shortest route pattern in a switchhierarchy.Communication Server 2100Meridian SL-100 Product Guide555-4001-103 20.01 StandardSE09 20 October 2006Copyright © 2006, Nortel Networks Nortel Networks Confidential.