Specifications

Appendix D Supervision Terminal Commands Installation and Operation Manual
D-36 Commands FCD-E1LC Ver. 1.0
DEF SYS
Purpose
Define the system parameters. Refer to Table D-10 for the parameter
description, allowable ranges and configuration guidelines.
Syntax
DEF SYS
Use
To define the FCD-E1LC system parameters, type:
DEF SYS<Enter>
The system parameters data form is displayed. A typical form is shown
below. The form presents the current parameter values as defaults.
CLK_MASTER CLK_FBACK DATE_FORMAT
ML NONE DD-MM-YYYY
After the desired parameter values are selected, press <Enter> to end.
Table D-10. System Configuration Parameters
Designation Function Values Configuration Guidelines
CLK_MASTER
Selects the master
system timing
reference.
INT – Internal oscillator.
ML – Locked to the recovered main
link receive clock.
SL – Locked to the recovered sublink
receive clock.
CH1 – Locked to the external clock
supplied to the user data channel 1,
provided the channel timing mode is
DTE2.
CH2 – Locked to the external clock
supplied to the user data channel 2,
provided the channel timing mode is
DTE2.
Default: ML
Select ML for connection to
carrier lines.
Select CH1 or CH2 for
connection to a data
network.
Select INT at one end and
ML at the other end for
point-to-point lines.
CLK_FBACK
Selects the alternate
(fallback) system
timing reference, for
use in case the
master reference
fails.
NONE – No fallback source is used. In
this case, the internal oscillator is
automatically selected when the
master reference fails.
ML – Locked to the recovered main
link receive clock.
SL – Locked to the recovered sublink
receive clock.
Select a source different
from that selected as
master.
Select NONE to disable
switching to the fallback
source. In this case, the
default fallback clock source
is the FCD-E1LC internal