6.1
Viewing The DXPT1 Board Alarms And Indicators
LED*
LABEL
ERROR OR STATUS CONDITION WHEN LED IS LIT
l
(Status)
Rapid flash = defective board
Steady on = board in wrong slot or board constraints violated
Off with repeated five second blink on = normal operation
(T1 trunk idle)
On with repeated five second blink off = normal operation
(T1 trunk busy)
l
Red
Communications with network cannot be established
(out-of-service)
¤
Yellow
Disruption in remote T1 service
l
Sync
Loss of sync with the incoming signal
l
SIG
Loss of incoming signal
l
Blue
Alarm indication signal (AIS) being received (indicates loss
of signal at far end)
l
Bipolar
Bipolar violation detected
l
CRC
Cyclic redundancy check error in incoming frame if SW2-4
is enabled (ESF only)
l
SLIP
Frame slip detected
l
Unlock
Transmit frequency (1.544 MHz) not locked with receive clock
¡
B8ZS/COFA
B8ZS/COFA (B8ZS zero suppress mode/change of frame
alignment) per SW2-6
l
RLB
Remote loopback active
l
LLB
Local loopback active
l
PAYL
Payload loopback active
¡
Diagnostics codes (for factory test only)
¡
Diagnostics codes (for factory test only)
¡
Diagnostics codes (for factory test only)
¡
Diagnostics codes (for factory test only)
¡
Diagnostics codes (for factory test only)
¡
Diagnostics codes (for factory test only)
¡
Diagnostics codes (for factory test only)
¡
Diagnostics codes (for factory test only)
6.2
Viewing DXOPT-SYN Synchronization Card Alarms And Indicators
LED*
LABEL
ERROR OR STATUS CONDITION WHEN LED IS LIT
¡
PRI
Timing reference is present from the DXPT1 primary board
¡
SEC
Timing reference is present from the DXPT1 secondary board
l
UNLOCKED
Trouble (defective DXOPT-SYN card or receive frequency
out of tolerance (1.544 MHz
±
200 Hz))
l
MANUAL
The manual mode is active for selecting the DXPT1 reference
NOTE: Red /Yellow LEDs, when lit, indicate errors or non-standard configuration for normal operation. Green
LEDs indicate a normal condition.
*LED color legend
l
= Red
¤
= Yellow
¡
= Green
IMI89–193
Installing The DXPT1 Line Board
28 – Installing The DXPT1 Line Board