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ACCULINK 316x DSU/CSU
C-12 December 1996 3160-A2-GB22-10
General Configuration Options
Table C-6
General Configuration Options
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 T1 Interfaces.
NOTE: This configuration option is only available when the DSX-1 Drop/Insert T1 Interface is enabled. If the DTE
Interface is disabled, the DSU/CSU always generates the yellow alarm signal on the Network interface and this
configuration option does not appear.
Enab – Generates the yellow alarm signal during a red or blue CFA state for both the Network and Drop/Insert T1
Interfaces.
Disab – Disables the yellow alarm signal. When this configuration option is disabled, red and blue CFAs on the Network
T1 interface cause an AIS signal to be transmitted on the DTE Drop/Insert T1 interface.
WARNING: When this configuration option is disabled, the DTE equipment connected to the Drop/Insert T1 interface is
responsible for generation of the yellow alarm signal for CFAs on the Network T1 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 DSX-1 interface. Failure to
do so is a violation of FCC Rules and DOC Regulations.
Clock Src: NET
Next NET DTE Prt1 Int Ext Prev
DSU/CSU Clock Source. Specifies the source for the master clock for the DSU/CSU. This selection provides
synchronization for all timing within the DSU/CSU and the clocks for all external interfaces. The clock rate(s) for the
external timing interfaces are independent of the input rate for the master clock.
NOTE: Failure of the clock specified here results in automatic fallback to the DSU/CSU’s internal clock.
NET – Configures the Network T1 Interface as the source for the master clock.
DTE – Configures the DTE Drop/Insert T1 Interface as the source for the master clock. This configuration option is not
available if the DTE Drop/Insert Interface is disabled.
Prt1 – Configures data port 1 as the source for the master clock. This is the only synchronous data port you can use for
the master clock.
Int – Configures the internal clock as the source for the master clock.
Ext – Configures an external clock (provided through the ‘‘Clock In” connector) as the source for the master clock.
Clock Rate: 1544
Next 2048 1544 8 Prev
External Clock Rate. Specifies the clock rate when the master clock source is an external clock. This configuration option
is only available when the clock source is an external clock (Ext).
2048 – Sets the input rate of the master clock to 2,048 kHz.
1544 – Sets the input rate of the master clock to 1,544 kHz (factory default.)
8 – Sets the input rate of the master clock to 8 kHz.
NOTE: For more information, see the
T
iming
section in Chapter 3,
Operation
.
NOTE: External clock rate 2,048 kHz does not imply E1 compatibility.