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Processing Functions
Alarm
No I2C avail-
able
Codec failure Alarm
Receiver clip-
ping
Signal quality
alarm
System boot-
ing
Table 6:
Alarms modem
Certain alarms are set in such a way that they can occur during system start (or as a reaction to
configuration commands).
A list of possible alarms can be displayed with the command <show alarm enabled>. As soon as an
alarm condition applies to one of these alarms it is activated and adopted by the system-wide state.
The list of active alarms can be displayed with the command <show alarm active>.
Commands for alarm configuration
< s h o w a l a r m a c t i v e >
< s h o w a l a r m e n a b l e d >
< s e t i n t e r f a c e f s k 0 [ n o ] a l a r m { d c d | d c d - d e l a y e d | s q } >
2.8
Processing Functions
The 500FSD20 modem has the following characteristics (see also Tab. 18):
VFT channels in the CCITT grid for different bit rates (bps - bits per second) rates:
• 24 channels 50 bps R.35
• 12 channels 100 bps R.37
• 6 channels 200 bps R.38A
• 8 channels 200 bps R.38B
• 2 channels 600 bps
• 1 channel 1200 bps V.23
• 1 channel 2400 bps
18
Stage
Enabled
(as
default
value)
Alarm
Yes
Yes
Warning
Yes
Alarm
Yes
Alarm
Yes
Config-
Reason
urable
No
Alarm, if I2C bus not
available - No configu-
ration saving, no data
communication
No
Alarm, if Codec not
accessible - No data
communication
No
Warning, if receiver
amplification is too high,
so receiver is clipping
Yes
• signal quality (SQ)
below the SQ
threshold more than
10 times within 4
seconds
• no carrier is
detected for more
than a baudrate
dependent time
No
The system restarts.
Functions
Command
<set interface fsk0
alarm sq>
1KGT151043 V001 1
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