FMUX/S-4E1-E2 Multiplexer
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Copyright © 2007 Cronyx
29
Then the state of each E1 port is displayed:
• 'Receive level=...dB' – signal level at the receiver input: 0 to -40 dB (-40 dB – when the
port cable is disconnected); 'Unused' – if the port is not used;
• 'Loop' – loop is enabled;
• 'Tributary loop' – tributary loop is enabled;
• 'Transmit AIS' – the AIS signal is output to the port (the 'all ones' code);
• 'Remote loop' – remote port loop is enabled;
• 'Test' – the BER tester is enabled.
The lower part of the screen shows E1 port states and statistic counters. The displayed
information is related to the local device, and – when access to the remote device is
available – to the remote device (the
'remote' lines
). States are not shown for unused
ports.
Statistics counters:
•
'CV'
– number of data code violations;
Under the
'-Errored seconds-'
message, column headings are located:
•
'Receive'
– the number of seconds, during which frame synchronization has been lost
in the link;
(The
'Transmit'
column is not used for this multiplexer model, and shows a '-' for each E1
port.)
Port
'State'
is displayed as a set of flags:
• 'OK' - normal mode, frame synchronization present;
• 'LOS' – loss of signal in the link;
• 'AIS' – link failure signal is received (the 'all ones' code);
