DSU Operations5-73610-A2-GB41-70 July 1999Menu StructureThe menu tree is accessed via the DCP (SDCP for aDBM-V, DBM-S, or DBM-D) and is shown inAppendix A. The menus that appear in the menu treedepend upon the DSU’s function within the network(control or tributary), the hardware options that areinstalled (DBM, TDM or MCMP, LPDA*), and theDSU’s mode of operation.A Model 3610 DSU-TDM or DSU-MCMP comesfrom the factory configured as a tributary, while aModel 3611 DSU-TDM or DSU-MCMP comesconfigured as a control. In addition, a DSU-TDM comesconfigured for TDM mode, while a DSU-MCMP comesconfigured for MCMP mode. The mode of operation canbe changed to disable the TDM or MCMP circuit card orto configure it to operate as a digital bridge.Use the Configuration (Confg) branch of the menu treeto change these settings and customize the DSU-TDM’sor DSU-MCMP’s configuration.Menus and Mode of OperationA DSU not equipped with a TDM or MCMP is alwaysoperating in Basic mode, whereas a DSU equipped with aTDM or MCMP can operate in one of several modes. Themode of operation affects the menus that appear, as wellas the selections that are available within the menus.For a DSU-TDM, the following selections are availablethrough the MUX path of the Configuration branch:TDM, CBrdg (central-site bridge), EBrdg (extendedbridge), and None. For a DSU-MCMP, the followingselections are available: TDM, MCMP, CBrdg, EBrdg,and None. Selecting None disables the TDM or MCMPcircuit card; the unit operates as though there is no TDMor MCMP installed in the DSU.When a TDM or MCMP is installed and enabled, theCBrdg and EBrdg selections permit the TDM or MCMPto operate in Bridge mode. For TDM, MCMP, or Bridgemode, a port number ( Prt1 through Prt6 ) must bespecified before issuing some commands. The resultsreturned by the DSU may vary depending upon theoperating mode (MUX Funct configuration option) andthe port selected.Local/Remote Menu SubbranchesThe Local branch menu has five subbranches and theRemote branch menu has four:• The Status (Stat) branch reports the health andstatus of the DSU and its options, the DTEinterface, the DSU’s identification information, thestatus of the connected DTE’s EIA-232 and V.35interfaces, and, if there is a dialed PSTNconnection, the quality of the PSTN circuit.• The Backup (Bckup) branch controls the operationof the dial backup feature. Through this branch, thethe digital bridge or aggregate switch is activated ordeactivated. This branch can only be accessed fromthe Local branch.• The Test branch provides extensive testingcapabilities for the DSU, the DDS circuit, theDBM, and the backup circuit if there is a backupcall in progress. This branch also provides testcapability for TDM or MCMP circuitry and theadditional ports.NOTEIf the Test branchdoes notappear, the DSU is in Displaymode; values can be read but notchanged. Only authorizedpersons can change configurationoption values for the DSU.Contact your SystemAdministrator for furtherinformation.• The Configuration (Confg) branch provides theability to customize DSU and DBM softwareconfiguration options, to enter and changetelephone numbers (if a DBM is installed), tochange the DSU network address, and to specifythe protocol used by a connected NMS. For aDSU-TDM or DSU-MCMP, the mode of operation(TDM, MCMP, Bridge, or Basic) is selected, andthe TDM or MCMP port and port speedconfiguration options are also set using this branch.*The SNA Diagnostic Interface option (LPDA on the menu tree) for multipoint applications is discussed in this guide.Refer to the COMSPHERE 3600 Series Data Service Units, Models 3610 and 3611, Dial Backup Module and SNADiagnostic Interface Options, Applications Guide for point-to-point applications and the configuration options unique tothose SNA Diagnostic Interface (LPDA-2) applications.
