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Description Use the display controller cpos command to display information about CPOS
interfaces, such as state of E1/T1 channels, and alarms, and errors occurred to the
regeneration section, multiplex section, and higher-order path.
The following table lists possible error types in the displayed information:
In this table, FRED, COFA, and SEF are alarm errors (AERRs).
Related command: display controller cpos e1, display controller cpos t1.
Example # Display the path information of interface CPOS 4/0.
<Sysname> display controller cpos 4/0
Cpos4/0 current state : UP
Description : Cpos4/0 Interface
Frame-format SDH, multiplex AU-3, clock master, loopback not set
Tx: J0: 0x01, J1: "NetEngine", C2: 0x02
Rx: J0: 0x01, J1: "NetEngine", C2: 0x02
Regenerator section:
Alarm: none
Error: 0 BIP, 0 SEF
Multiplex section:
Alarm: none
Error: 0 BIP, 0 REI
Higher order path(VC-3-1):
Alarm: none
Error: 0 BIP, 0 REI
Higher order path(VC-3-2):
Alarm: none
Error: 0 BIP, 0 REI
Higher order path(VC-3-3):
Alarm: none
Error: 0 BIP, 0 REI
Cpos4/0 CT1 1 is up
Frame-format ESF, clock master, loopback not set
Cpos4/0 CT1 2 is up
Frame-format ESF, clock master, loopback not set
Table 121 Possible error types
Field Description
FRED Receive loss of basic frame alignment, or receive frames with red alarm
errors.
COFA Change of frame alignment.
SEF Severely error frame. Four consecutive frame synchronization errors
generate one SEF.
FERR Framing Bit Error. It refers to the frame with the Ft/FPS/FAS error.
CERR CRC error
FEBE Far end block error. This occurs when the CRC4 framing format applies on
the E1 channel.
BERR PRBS bit error (Pseudo-random binary sequence bit error, for test only).
BIP Bit-interleaved parity.
REI Remote error indication.