Alarms
Reference Manual for EL470 IP Satellite Modem
Alarm Label Name Description
generated if at least one of the
monitored power supply voltages
is out of range.
Ethernet IfA Link AlItfaLink This interface alarm is triggered
on a missing or invalid input
signal (Link Down) at the
ethernet interface A. (this alarm
does not include further signal
processing related alarms).
Ethernet IfB Link AlItfbLink This interface alarm is triggered
on a missing or invalid input
signal (Link Down) at the
ethernet interface B. (this alarm
does not include further signal
processing related alarms).
IP gateway unreachable AlIfGwUnreachable This interface alarm is triggered
when at least one of the
configured IP gateways in the
traffic path is unreachable.
Ethernet interface switchover AlEthSwo This alarm indicates that an
Ethernet interface switchover
has happened, with Ethernet
interface redundancy enabled.
Demod RX Decoder Bad
Packet
AlIfRxBadPacket The decoder on the interface
card has received
unrecognizable packets from its
baseband interface, which is
usually attached to a
demodulator.
Plausible cause : user configures
reception of a specific
datastream, but the real data has
not been not encoded with the
expected (or unrecognizable)
protocol.
Demod Rx Buffer Overflow AlIfBBRXOverflow The frames were dropped at the
baseband interface.
Baseband frame sync AlMoBbSync A Baseband framing sync alarm
indicates loss of synchronisation
between the baseband framing
and the input signal.
Clock PLL AlMoClkPll The clock PLL alarm is
generated when the transmit
clock is not synchronised to the
interface clock, if the device
operates with external transmit
clock. The alarm is asserted
when the buffer contents exits
the centre zone [40% - 60%].
For the lower bitrates, the
nominal buffer set-
point(=contents) is reduced in
order to minimize overall delay.
Therefore the lower limit for the
PLL alarm is reduced as well :
1 Mbps <= interface rate : [40% -
60%] nominal 50%
200 Kbps <= interface rate < 1
Mbps : [10% - 60%] nominal
version 3.1
252
SHAPING THE FUTURE OF SATELLITE COMMUNICATIONS
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