SDCP Operation3-353166-A2-GB20-20 March 1999Selecting the Timing SourceThe DSU/CSU provides the ability to select a master clock (timing) sourcethat is used to synchronize all of the T1 and data port interfaces on theDSU/CSU. The clock for each interface is at the appropriate rate for thatinterface (e.g., 1.544 Mbps for the T1 interface, the configured port rate for thedata ports), and it is independent of the master clock rate. This means that themaster clock rate and the DSU/CSU interface rates may be different.The clock source configuration options enable you to select either the networkinterface, a synchronous data port, or the internal clock.Configuring for Network Timing ProcedureTo configure for network timing:1. From the top-level menu screen, select Cnfig.2. Select the configuration option set to be copied into the Edit area by using theappropriate Function key. Use the scroll keys, if necessary.3. Select Edit.4. From the Edit screen, press the key until the Gen selection appears onthe screen.5. Select Gen.F1Edit:NET Chan GenF2 F36. Press F1 (Next) to display the next configuration option (Clock Src).7. Select the master clock source. For network, press F2 (note that network isalso the default).F1Clock Src:NETNext NET Prt1F2 F3
