C. Configuration OptionsC-16 February 2001 3160-A2-GB21-90General Configuration OptionsTable C-6. General Configuration Options (1 of 2)Gen Yellow: EnabNext Enab Disab PrevGenerate Yellow Alarm Signals. Determines whether the DSU/CSU generates YellowAlarm signals on the network and DTE Drop/Insert (DSX-1) interfaces.NOTE: This configuration option is not available for 1-port DSU/CSUs or if the DTEDrop/Insert (DSX-1) Interface is disabled. If the DTE Drop/Insert (DSX-1) interface isdisabled, the DSU/CSU always generates the Yellow Alarm signal on the networkinterface.Enab – Generates the Yellow Alarm signal for both the network and DTE Drop/Insert(DSX-1) interfaces.Disab – Disables the Yellow Alarm signal. When this configuration option is disabled,Yellow Alarm conditions on the network interface cause an AIS signal to be transmitted onthe DTE Drop/Insert (DSX-1) interface.NOTE: When this configuration option is disabled, the DTE equipment connected tothe DTE Drop/Insert (DSX-1) interface is responsible for generation of the Yellow Alarmsignal on the network interface. In this case, the interface port marked DTE must onlybe connected to an FCC Part 68 Registered (for USA) and Canadian DOC Certified(for Canada) Digital Service Unit or System, such as PBX, with a DTE Drop/Insert(DSX-1) interface. Failure to do so is a violation of FCC Rules or DOC Regulations.Clock Src: NETNext NET DTE Prt1 Int Ext PrevDSU/CSU Clock Source. Specifies the master clock source for the DSU/CSU. Thisselection synchronizes all internal timing and external interface clocks. The clock rate(s)for the external timing interfaces are independent of the input rate for the master clock.Failure of the clock specified by the Clock Source selection results in automatic fallback tointernal clock.NET – Configures the network interface as the master clock source.DTE – Configures the DTE Drop/Insert (DSX-1) interface as the master clock source. Thisselection is not available for 1-port DSU/CSUs or if the DTE Drop/Insert (DSX-1) interfaceis disabled. If the DTE Drop/Insert (DSX-1) interface is disabled after making thisselection, the master clock source is changed to NET.Prt1 – Configures data port 1 as the master clock source. This is the only synchronousdata port you can use for the master clock. If you enable EDL if for Port 1 and theDSU/CSU Clock Source is set to Prt1, the external device must provide clocking of8 kbps less than the expected data port rate. For example, if you select 64 kbps, theexternal clock must supply a 56 kbps clock signal.Int – Configures the internal clock as the master clock source.Ext – Configures an external clock (provided through the Clock In connector) as themaster clock source. This selection is only available on 2-port and 4-port DSU/CSUs.
