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C. Configuration Options
C-16
February 2001 3160-A2-GB21-90
General Configuration Options
Table C-6. General Configuration Options (1 of 2)
Gen Yellow: Enab
Next Enab Disab Prev
Generate Yellow Alarm Signals. Determines whether the DSU/CSU generates Yellow
Alarm 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 DTE
Drop/Insert (DSX-1) Interface is disabled. If the DTE Drop/Insert (DSX-1) interface is
disabled, the DSU/CSU always generates the Yellow Alarm signal on the network
interface.
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 on
the DTE Drop/Insert (DSX-1) interface.
NOTE: When this configuration option is disabled, the DTE equipment connected to
the DTE Drop/Insert (DSX-1) interface is responsible for generation of the Yellow Alarm
signal on the network interface. In this case, the interface port marked DTE must only
be 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: NET
Next NET DTE Prt1 Int Ext Prev
DSU/CSU Clock Source. Specifies the master clock source for the DSU/CSU. This
selection 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 to
internal 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. This
selection is not available for 1-port DSU/CSUs or if the DTE Drop/Insert (DSX-1)
interface
is disabled. If the DTE Drop/Insert (DSX-1) interface is disabled after making this
selection, the master clock source is changed to NET.
Prt1
– Configures data port 1 as the master clock source. This is the only synchronous
data port you can use for the master clock. If you enable EDL if for Port 1 and the
DSU/CSU Clock Source is set to Prt1, the external device must provide clocking of
8 kbps less than the expected data port rate. For example, if you select 64 kbps, the
external 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 the
master clock source. This selection is only available on 2-port and 4-port DSU/CSUs.