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Indicator
Loop (LP)
Carrier (CR)
Loop Sync (LP)
Carrier Sync (CR)
Activation (ACT)
Test (TST)
Error (ERR)
When the DE-4 U-BR1TE is deployed in a channel bank
located at the same facility as the ISDN servicing switch
(Adjacent-to-Switch) or in a tandem Office configuration,
the channel bank should be provisioned for external
timing. External timing from a suitable composite clock
must have Stratum One traceability. When deployed in
a remote terminal (Adjacent-to-Customer), the timing for
that channel bank may either be loop-timed (LP) or timed
from an external source. Consult local provisioning
documents for timing options.
3. CONFIGURATION
There are several switch settings on SW1 that must be
configured before installing the DE-4 U-BR1TE. Figures
1 and 3 identify the location of SW1 and its switch settings.
Table B describes the settings for determining the
appropriate switch positions. Figure 2 displays a typical
circuit position and associated switch settings.
61410020L2-5C
Table A. Faceplate LED Indicators
Color
Yellow
OFF during normal operation or test modes, indicates no Near-End Block Errors
(NEBE) or Far-End Block Errors (FEBE) are detected from the U-interface loop.
Flashes yellow upon receipt of a NEBE or FEBE. During Local Performance
Monitoring (see Section 4) will flash yellow when a BER > 10
illuminate yellow when a BER > 10
Yellow
OFF during normal operation or test modes, indicates no NEBEs or FEBEs are
detected from the carrier. Flashes yellow upon receipt of a NEBE or FEBE. During
Local Performance Monitoring (see Section 4) will flash yellow when a BER > 10
detected and illuminate yellow when a BER > 10
Red
Illuminated when U-interface is out of sync or has a loss of signal. OFF indicates
loop synchronization has been established.
Red
Illuminated when no framing pattern (TR-TSY-000397 compliant) is received.
OFF indicates carrier synchronization has been established.
Illuminated when Layer 1 is established from the ISDN switch to the customer
Green
ISDN terminal equipment.
Yellow
Solid yellow when front panel test has been successfully initiated or when
responding to a 2B+D loopback request.
Flashes yellow once every two seconds when responding to a B1 loopback
request or when forced into a B1 loopback from the front panel.
Flashes yellow twice every two seconds when responding to a B2 loopback
request or when forced in to a B2 loopback from the front panel.
Green
Solid Green when in Local Preformance Monitoring or when the local test pattern
gen/det is invoked.
Flashes red when errors are seen by local test pattern detector.
Red
Section 61410020L2-5, Issue 3
Description
-5
is detected.
-5
is detected.
SW2
LULT (RT)
ADJ
1
2
O
O
1
2
N
N
LUNT (COT)
TANDEM
SW6 (0nly on the L4)
1 2 3 4
O
N
1 2
O
N
SW5
Figure 3. SW1, SW2, and SW6 Labeling
-6
is detected and
-6
is
NORM
POWER
1 2
3 4
O
N
SW1
3
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