Command Reference Guide

3Com Router 5000 Family and Router 6000 Family display controller cpos ● 77
Command Reference
View This command can be used in the following views:
■ Any view
Description The following table describes the possible error types in the displayed information:
In this table, FRED, COFA, and SEF are alarm errors (AERRs).
Table 1 Description of the display controller cpos command
Field Description
Cpos4/0/0 current state: Current physical state of the CPOS interface
Description: Interface description
Frame-format SDH, multiplex AU-3, clock
master, loopback not set
Physical layer information of the CPOS interface:
SDH frame format, AU-3 multiplexing path,
master clock mode (use internal clock signal), and
no loopback.
Tx: J0: 0x01, J1: "NetEngine", C2: 0x02 The sent overhead bytes
Rx: J0: 0x01, J1: "NetEngine", C2: 0x02 The received overhead bytes
Regenerator section: Alarm and error statistics about the regeneration
section
Multiplex section: Alarm and error statistics about the multiplexing
section
Higher order path(VC-3-x): Alarm and error statistic about the higher-order
path. The x in “VC-3-x” indicates the path
number. When adopting AU-3 multiplexing path,
one STM-1 is multiplexed by three VC-3s with
three higher-order multiplexing path while in the
AU-4 multiplexing path, there are one
higher-order path VC-4s.
Alarm: Alarm statistic
Error: Error statistic
Cpos4/0/0 CT1 1 is up The current physical state of T1 channel 1 of the
CPOS interface 4/0/0
Frame format ESF, clock master, loopback not
set
Physical layer information of T1 channel: ESF
frame format, master clock mode (use internal
clock signal), and no loopback
Table 2 Possible error types
Field Description
FRED Receive loss of basic frame alignment, or receive the frame with red
alarm error
COFA Change of frame alignment.
SEF Severely errored frame. Four consecutive frame synchronization errors
generate one SEF.
FERR Framing Bit Error. It refers to the frame with Ft/FPS/FAS error.
CERR CRC error
FEBE Far end block error. This occurs when the CRC4 frame 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