Digital Link DL600E, User Manual

Page: 61 / 147

ConÞguring the DL600E Unit 3-27
CRC4 Threshold Alarm
Ñ(Cyclic Redundancy Check)
A
x
10
^
B
(DefaultÑ
Disabled
)
Set
A
and
B
in
A x 10 ^ B .
Maximum threshold is
1;
minimum threshold is
1.7 x 10
-5
.
Example: 1.2 x 10
-2
The alarm is generated when the
CRC4
s exceed the threshold.
FE Threshold Alarm
(Frame Error Event) Ñ
A
x
10
^
B
(DefaultÑ
Disabled
)
Appears in the menu only when the remote unit is a DL600E unit and
applies only to it. Set
A
and
B
in
A x 10 ^ B .
Maximum threshold is
7.5 x
10
-2
;
minimum threshold is
2.1 x 10
-6
.
Example:
4 x 10
-4
The alarm is generated when the
FE
s exceed the threshold.
Alarm Conditions and System Action
Table 4-2 lists the alarm conditions and the DL600E unit action.
In the example in Figure
3-7
, the remote unit can be a DL600E1 or a
DL600E unit.
Table 4-2 DL600E Alarm Conditions and System Action
Condition Action
Loss of data port DL600E unit sends a Framed All Ones to E1
network.
Loss of Signal appears in DATA DTE Status ,
Menu-1 Main Status
Loss of Signal or Loss of
Frame on network and AUX E1
ports DL600E unit sends a Remote Alarm Indication
signal to network port, drops RLSD line on
data port.
Loss of Signal
or
Loss of Frame
appears in
Network Status , Menu-1 Main Status
Remote Alarm Indication
from network AUX E1 ports
RAI Received
appears in
Network Status
,
Menu-1 Main Status
Unframed All Ones on
Network AUX E1 ports DL600E unit sends a
Remote Alarm Indication
signal to network port, drops RLSD line on
data port.
UA1 Received appears in Network Status ,
Menu-1 Main Status.