Section SDSĆ548Ć6LNĆ204
030Ć101328 Rev. A
R
0208I4RA
4
LED
ON
OFF
FLASHING
LED
ON
OFF
FLASHING
PWR
Power Applied
Power Not
Applied
NA
SC
Sealing CurĆ
rent Applied
Sealing CurĆ
rent Not ApĆ
plied
NA
ALIGN/
LPBK
Command
Mode, AlignĆ
ment Mode or
Transponder
Mode
Idle
Loopback
Mode
FAIL/
TEST
Logic Failure
Idle
Test Mode
XMT
Receiving data
from EquipĆ
ment
Idle
NA
RCV
Transmitting
data to EquipĆ
ment
Idle
NA
Table 2. Operating Levels LED Status Indicators
3.2
Option Switches
The SDS5486LN contains three option switches that must be set
to the required position before the unit is installed. Option
switch S1 (Sealing Current) is used to select the appropriate
sealing current configuration (Supply/Off/Term). Option switch
S2 (Facility Impedance) is used to select the impedance of the
unit (150/600/1200 Ohms) that will match the impedance of the
4Ćwire facility. Option switch S3 (2W/4W) is used to set INTELIĆ
PORT's internal circuitry to properly interface the 2Ćwire or
4Ćwire data modem equipment.
3.3
Unit Identification Tone
The SDS5486LN provides a unit identification feature that alĆ
lows the Test Center to verify which unit is being accessed. Upon
receiving 2713 Hz for more than two seconds, INTELIPORT
outputs an I.D. tone (one second of alternating 1014Hz/414 Hz)
identifying the circuit being accessed as Westell's INTELIPORT
I, Model SDS5486LN (Issue 4). At this point, if the 2713 Hz tone
is removed in less than 30 seconds INTELIPORT enters loopĆ
back. If 2713 Hz is applied for more than 30 seconds,
INTELIPORT enters command mode.
3.4
Command Mode
As mentioned, the command mode is activated by sending
2713Hz via the RCV IN port (RT and RR, pins 7 and 13, respecĆ
tively) for more than 30 seconds. NOTE: If 2713Hz is removed
in less than 30 seconds, INTELIPORT sends a 1Ćsecond alterĆ
nating tone of 1014Hz/414Hz and enters loopback.
Upon detecting 2713Hz for more than 30 seconds, INTELIĆ
PORT enters the command mode and returns a steady 1014Hz
tone at +5 dBm (TLP) via the XMT OUT port (TT and TR, pins
41 and 47, respectively) indicating command mode initiation.
STC, at this point, removes the 2713Hz tone being sent to INTEĆ
LIPORT.
While in command mode, the STC can activate INTELIPORT's
intelligent functions which include: XMT OUT Level Adjust
mode, remote alignment mode, TLP or DLP Quiet Term/TransĆ
ponder mode or the STC can exit the command mode and return
to idle.
Ć NOTE Ć
The command mode is equipped with a 5Ćmin timer circuit.
If no tone is sent to INTELIPORT during the five minute time
frame, INTELIPORT sends an error tone (rampĆdown tone
from 3014 Hz to 314 Hz; holding 314 Hz for 10 seconds) and
returns to idle. The rampĆdown tone, in this case, indicates the
command mode has timed out via the 5Ćmin timeĆout feature.
.
3.5
Alignment Mode
INTELIPORT features both remote and automatic alignment
capability. Remote alignment is used to align INTELIPORT
from the STC. Alignment is done at TLP and with respect to eiĆ
ther three tones or four tones. AutoĆAlign is used to
automatically align INTELIPORT with an intelligent ETO at
the near end (ISQ4389LNI2 or AUA441LN). AutoĆAlign is also
done at TLP and with respect to four tones. Please note, howevĆ
er, that the autoĆalign feature is only initiated by pressing the
frontĆpanel TEST switch for more than five seconds and only
during the first five minutes of initial powerĆup. AutoĆAlign is
also activated from command mode by sending 1804Hz to INĆ
TELIPORT.
3.6
AutoĆAlign
As mentioned, AutoĆAlign is initiated during the first five minĆ
utes of initial powerĆup by pressing the frontĆpanel TEST switch
for more than five seconds or from command mode by sending
1804Hz to INTELIPORT. Upon initiating AutoĆalign mode, INĆ
TELIPORT then sends 2913Hz out the RCV IN port (pins 7,13)
to the near end ETO. Upon entering command mode, the ETO
will then return 1014Hz to INTELIPORT.
When 1014Hz is detected from the near end, INTELIPORT
sends 1014Hz. Upon detecting 1014Hz from INTELIPORT, the
near end returns 2814Hz. Upon detecting 2814Hz from the near
end, INTELIPORT sends 2814Hz. Upon detecting 2814Hz
from INTELIPORT, the near end returns 414Hz. Upon detectĆ
ing 414Hz from the near end, INTELIPORT sends 414Hz.
At this point, if the near end has the capability of aligning to four
tones, the near end, upon detecting 414Hz from INTELIPORT,
returns 1814Hz to INTELIPORT. Upon detecting 1814Hz, INĆ
TELIPORT sends 1814Hz. Upon detecting 1814Hz from
INTELIPORT, both ends align to four tones.
Upon completion of alignment (approximately two to three
minutes), INTELIPORT returns to idle. The near end also reĆ
turns to idle.
