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Product Description
Front Panel Display
The front panel display is used with the MODE and SEL buttons to display system diagnostic messages. Refer to
Table 6
for a listing of the four-character messages.
The front panel display turns on when power is initially applied to the ELU-319 List 5E and List 6E. To conserve
power, the display only remains on for 4 minutes. The use of the MODE or SEL buttons activates the front panel
display and restarts the 4-minute, power-control timer.
Message
Full Name
CREM
Customer Remote Loopback
NLOC
Network Local Loopback
CLOC
Customer Local Loopback
NREM
Network Remote Loopback
TLOS
Transmit Loss Of Signal
LBPV
Local Bipolar Violation
SIG 1 or 2
Signal 1 or Signal 2
S2L1 or 2
Signal 2 Loop 1 or Loop 2
S3L1 or 2
Signal 3 Loop 1 or Loop 2
S4L1 or 2
Signal 4 Loop 1 or Loop 2
ACQ 1 or 2
Acquisition 1 or Acquisition 2
A2L1 or 2
Acquisition 2 Loop 1 or 2
A3L1 or 2
Acquisition 3 Loop 1 or 2
A4L1 or 2
Acquisition 4Loop 1 or 2
H1ES
HDSL CRC Error Channel 1
H2ES
HDSL CRC Error Channel 2
ACO
Alarm CutOff
SELF TEST
Self Test
8
Table 6. Front Panel Display Messages
Description
Signal from customer is looped back to the customer at ELU-319.
G.703 signal is looped back to G.703 at ELU-319 List 5E and List 6E.
Signal from Customer is looped back to the customer at the ERU.
G.703 signal is looped back to G.703 at the ERU.
ERU is in a logic loopback state caused by a loss of its E1 input from
the CI, if enabled at the ERU by its TLOS switch option.
A bipolar violation has been received at the E1 input to the ELU-319.
The transceivers of the ELU, ERU or first doubler are trying to
establish contact with each other on Loops 1 or 2 of Span 1.
The transceivers of the first doubler and either the ERU or second
doubler are trying to establish contact with each other on Loops 1
or 2 of Span 2.
The transceivers of the second doubler and either the ERU or the
third doubler are trying to establish contact with each other on
Loops 1 or 2 of Span 3.
The transceivers of the third doubler and either the ERU or the fourth
doubler are trying to establish contact with each other on Loops 1
or 2 of Span 4.
The multiplexers of the ELU and ERU or first doubler are trying to
establish synchronization over Loops 1 or 2 of Span 1.
The multiplexers of the first doubler and either the ERU or second
doubler are trying to establish synchronization with each other on
Loops 1 or 2 of Span 2.
The multiplexers of the second doubler and either the ERU or third
doubler are trying to establish synchronization with each other on
Loops 1 or 2 of Span 3.
The multiplexers of the third doubler and either the ERU or fourth
doubler are trying to establish synchronization with each other on
Loops 1 or 2 of Span 4.
ELU HDSL Loop 1 CRC error.
ELU HDSL Loop 2 CRC error.
A system alarm has occurred, and has been retired to an ACO
condition, by pressing the SEL button on the ELU front panel.
The ELU is in a self-test mode. This occurs when there is no
communication between the ELU and the EDU/ERU.
January 26, 2000
150-319-205-05, Issue 5
ELU-319 List 5E and List 6E
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