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6540 SHDSL 2w4w NTU, AC Powered
LED Indicator Functionality
LED Off Green Yellow Red
SHDSL Unit is powered off Port is trained; no
active alarms
Port is trained with
minor active alarm
1
Port is attempting/is
trained with major alarm
2
G. 70 3 Port is not active Port is active with no
active alarm
Port is active with a
minor alarm
3
Port is active with a major
alarm
4
Nx64K Port is not active. Port is active with no
active alarm
N/A Port is active with an
active alarm condition
5
.
RTS/C Nx64K port is not active
or when active, V.35/V.36
'Request To Send' or X.21
'Control' line from the
DTE is OFF.
V.35/V.36 'Request To
Send' or X.21 'Control'
line from the DTE is
ON.
N/A N/A
RLSD/I Nx64K port is inactive or
when active, V.35/V.36
'Receive Line Signal
Detector' and X.21
'Indication' control line
from the NTU is OFF.
V.35/V.36 'Receive
Line Signal Detector'
or X.21 'Indication'
control line from the
NTU (DCE) is ON.
N/A N/A
LLOOP No Local Loop is active. N/A A Local Loopback is
active on the selected
port.
A Local Loop is active on
one or more ports or
services (when no port is
selected).
RLOOP No Remote Loop is
active.
N/A A Remote Loopback is
active on the selected
port (when determined
via established EOC)
A Remote Loop is active
on one or more ports or
services (when no port is
selected).
BERT BERT is not active. A BERT is active, and
the test pattern detector
is synchronized with
no received bit errors.
A BERT is active, and
one or more test pattern
bit errors have been
received.
BERT is active, but the
test pattern detector is not
synchronized.
1
Minor SHDSL port alarms are CRC errors, Loop Attenuation Threshold Alarm, SNR Margin Threshold Alarm, Segment
Anomaly, and any ES, SES, UAS, CVC, and LOSWS 15-Minute Threshold Alarm.
2
Major SHDSL port alarms are LOS, LOSW, or Segment Defect.
3
Minor G.703 port alarms are Rx RAI, Frame Slip, CRC-4 errors, LBER, and any ES, SES, UAS, and CVC 15-Minute Threshold
Alarm.
4
Major G.703 port alarms are LOS, LOF, LOMF, Rx AIS, or HBER.
5
Nx64K port alarms are Clock Slip, Loss of External Clock, FIFO Underflow/Overflow, and Inactivity Alarm.
DESCRIPTION
The ADTRAN
®
6540 SHDSL 2w4w NTU (P/N 1230001L1) functions as an interface between the
SHDSL network and the Data Terminal Equipment for applications such as LAN-to-LAN bridging,
Frame Relay circuit, and PABX termination. The NTU operates in two different system configurations:
♦ as a remote unit to the ADTRAN Total Access
®
3000 multiservice platform
♦ in pairs in a point-to-point limited distance campus configuration, with one NTU configured to “LT”
mode
FEATURES
The 6540 SHDSL 2w4w NTU is housed in a stand-alone plastic case having the features listed below:
♦ four recessed pushbuttons, on the front panel, described in the table below
♦ eight LED indicators, on the front panel, described in the table below
♦ SHDSL, G.703 and/or Nx64K ports, local management port, and local power AC connection on the
rear panel
Pushbutton Functionality
COMPLIANCE
EN 300 386-2; IEC 60950/EN 60950/AS NZS60950; S016; S043.2; ITU K.21 Enhanced; Telstra 1555
Pushbutton Description
PORT SELECT Pressing the SELECT button will sequentially select active ports in the following order: Nx64k
port, G.703 port, SHDSL port, and then cycle back to “No Port.”
LOCAL LOOP/
ERR INJ
If a port is selected, and a BERT (Bit Error Rate Test) is not in progress, then pressing the
button will initiate/terminate a local loop on the selected port. If a BERT is in progress, then
pressing the button injects a single bit error.
REMOTE LOOP If the SHDSL port is selected, then pressing the button either places or removes a remote loop
on the port by sending a EOC request message to the LTU (or NTU in campus mode). If the
Nx64K port or G.703 port (with only one service defined) is selected, then pressing the button
will place or remove a remote loop on the selected port's single data service by sending
respective inband loop up or loop down patterns to the far end (in the associated data service
timeslots).
BERT If a port is selected, and there are no local loops, then pressing the button starts or stop a BERT
on the selected port.
61230001L1-22A
0406
Express 6500 Series
6540 Front Panel
6540 Rear Panel
SHDSL G.703
Nx64K
V.35/V.36
X.21
100-240VAC 50/60Hz 100mA
CONTROL V.28
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