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HiGain
HiGain
FCC Clas
s A Compl
ian
ce
Th
is e
quipme
nt ha
s be
en
test
ed
and fo
und to co
mp
ly with the limi
ts fo
r a C
las
s A digita
l devic
e, pur
su
an
t
to
P
art 15 of
the FC
C R
ule
s.
Th
ese
limits
are
desi
gned to prov
ide re
ason
ab
le p
rote
ction
ag
ain
st ha
rm
ful
in
ter
fer
ence when t
he
equipm
ent i
s op
erat
ed in
a com
mer
cia
l envi
ronm
ent. T
his
equipm
en
t gener
ate
s,
uses
, and
can radiate r
adio
fr
equency en
ergy a
nd,
if not ins
talled and
used in ac
cord
ance wit
h th
e
in
struc
tion ma
nual,
may c
aus
e h
arm
ful
in
terf
ere
nce
to radio
co
mmunic
ation
s.
Opera
tion of this
equi
pmen
t in
a r
esi
denti
al a
rea
is
like
ly to
ca
use
harm
ful in
terfe
ren
ce
in whic
h ca
se
th
e us
er
will be
re
quire
d to
corre
ct
th
e in
ter
fer
ence at
hi
s own exp
en
se.
Limi
te
d W
arran
ty
Produ
ct
warranty is
deter
mined by
your
ser
vice
agreem
ent. C
ontact your s
ales
repr
esentativ
e or
Cu
stom
er S
ervic
e for
deta
ils.
Mo
difi
catio
ns
Any changes
or m
odifica
tions
mad
e to
this device that
are
not expr
essl
y approved
by ADC DSL
Sy
stem
s, I
nc.
voids
th
e user
's
warrant
y.
All wi
ring e
xte
rnal
to the
produ
cts
should
follow t
he pr
ovisions
of t
he c
urr
en
t e
dition
of the
Na
tional
Electr
ica
l C
ode.
Stan
da
rd
s Comp
lia
nc
e
Th
is e
qu
ipme
nt
has be
en
te
ste
d a
nd ve
rifie
d t
o c
om
ply
with the
ap
plic
ab
le s
ec
tions of
the f
ollowi
ng
safet
y st
and
ard
s:
GR 63-
CO
RE
- Netwo
rk
Equi
pment-B
uilding
Syst
em (
NE
BS)
Re
quire
ments
GR 1089-
CO
RE
- Ele
ctr
oma
gnetic
Co
mpatib
ility and E
lec
tri
ca
l S
afe
ty
Bin
ati
onal stand
ard
, UL
-1950
/CSA-
C22
.2
No. 950-
95: Safety
of
In
fo
rm
ation Techn
ology
Equip
ment
Trad
emark In
formati
on
ADC is
a regi
ster
ed tradem
ark of
ADC T
ele
co
mm
unica
tions,
In
c. Hi
Gain
is
a re
gist
ered
tradem
ark of
ADC DSL
S
yst
ems, I
nc.
Oth
er
product names
m
en
tioned in this in
stall
ation guide ar
e us
ed fo
r
id
entific
ation pur
poses
onl
y and may be
trademar
ks or
regis
ter
ed tradem
arks
of
th
eir
res
pec
tive
comp
anies
.
Cop
yri
gh
t In
formati
on
© 2002
ADC DSL
S
yst
ems, I
nc.
All rights
res
erv
ed. I
nfo
rm
ation cont
ained in this document
is
company
private to ADC
DSL Sys
tems
, I
nc.
, and s
hal
l not be modifi
ed, us
ed, copied,
re
produ
ced or
discl
ose
d in
whole or
in
part wi
thout the
writt
en
consent
of ADC
.
ADC DS
L S
ys
tems, In
c.
14402 Fr
anklin
Av
en
ue
Tu
stin,
CA
92780-
7013
Te
l: 714.832.
9922
Fa
x: 714.
832.
9924
Tech
nical
Assistan
ce
Te
l: 800.638.
0031
Te
l: 714.730.
3222
Fa
x: 714.
730.
2400
DN
V Cert
ifi
cat
io
n,I
nc
.
REGISTERED FIRM
IS
O9
001/TL
9000
T
HE
HLU-231 L
IST
8F
The HiGain
®
Line Unit HLU-231 List 8F is the Central Office (CO) side of a
repeaterless T1 transmission system. When used in conjunction with a HiGain Remote
Unit (HRU), the system provides 1.544 Mbps transmission on two unconditioned
copper pairs over the full Carrier Service Area (CSA) range. The CSA includes loops
up to 12,000 feet of 24 American Wire Gauge (AWG) or 9,000 feet of 26 AWG wire,
including bridged taps. This line unit can be used in applications with or without
HiGain Doubler Units (HDUs).
F
EATURES
S
PECIFICATIONS
•
Front panel status LED, craft port, and
four-character status display
•
Payload (PL) or HiGain (HG) loopback source
identification
•
Ultra-low wander
•
Reduced power consumption
•
Five-span range with four doublers
(60 kft, 24 AWG)
•
Low line-power option (-140 V) for circuits
with a single doubler
•
Selectable Power Feed modes
•
Bit Error Rate (BER) alarm options
•
Loss of Signal (LOS)/Alarm Indicator
Signal (AIS) payload alarm option
•
Additional screens for inventory and
troubleshooting
•
Supports Pulsecom HDSL 62/64 applications
•
Grounded loop detection
•
Bipolar Violation Transparency (BPVT) option
•
B8ZS default line code option
•
Unframed (UNFR) default framing option
Operating Temperature
-40 °F to +149 °F (-40 °C to +65 °C)
Operating Humidity
5% to 95% non-condensing
HDSL Span Voltage
-140 to ±112 Vdc
Mounting
220 mechanics high-density shelf
HDSL Line Code
784 kbps 2B1Q
HDSL Output
+13.5 dBm ±0.5 dB at 135
Ω
Maximum Provisioning Loss
35 dB at 196 KHz, 135
Ω
DS1 Line Rate
1.544 Mbps ±200 bps
DS1 Line Format
Alternate Mark Inversion (AMI) or Bipolar with 8-Zero Substitution
(B8ZS)
DS1 Frame Format
Extended SuperFrame (ESF), SuperFrame (SF) or Unframed (UNFR)
DSX-1 Pulse Output
6 V
pk-pk
, pre-equalized for 0 to 655 feet of ABAM cable
DSX-1 Input Level
+1.5 to -7.5 dB DSX
I
NSTALLATION
To ensure proper installation of the HLU, align the HLU with the enclosure slot guides
and slide the unit in. When the HLU is properly seated, the retaining latch snaps
closed.
P
OWER
-
UP
S
EQUENCE
When the HLU powers up, the four-character display illuminates and reports status
messages.
If the HLU is not communicating with the next span device, the following occurs:
1
Alarm and diagnostic messages display (see the Front Panel Alarm Messages and
Front Panel Diagnostic Messages tables inside), followed by the SELF TEST
message.
2
The Status LED turns yellow, indicating it has entered self-test mode.
If the HLU is communicating with the next span device, the following occurs:
1
The Status LED flashes green while acquiring each device in the system, and
turns a steady green when the entire system is operating without any alarms.
2
The four-character display reports margin (signal-to-noise ratio) readings and
insertion loss.
3
If the status LED is not solid green, the display reports alarm conditions (see the
Front Panel Alarm Messages table inside).
P
ROVISIONING
1
Access the Maintenance Terminal screens by pressing the
several times.
a
Set the date and time (select Set Clock from the Maintenance Terminal
Main Menu).
b
Set the circuit IDs (select View System Inventory from the Maintenance
Terminal Main Menu).
2
Access the System Settings screen from the Maintenance Terminal Main Menu
to change the default settings of any system parameters.
3
Access the View Troubleshooting screen from the Maintenance Terminal Main
Menu to view a graphical analysis of any potential system problems.
4
When the HLU has been successfully installed and provisioned, clear Span
Status, Performance Data, Performance History, and Alarm History screens to
ensure accurate data and alarm reporting thereafter.
Continued
SPACEBAR
Þ
L
8F
DSX-1
H
I
G
AIN
HLU 231
HLU-231 L
IST
8F
L
INE
U
NIT
Q
UICK
I
NSTALLATION
´,2<¶
1!¨
1218281
June 29
, 2000
Produ
ct C
atalog:
HL
U-231
-L
8F
CL
EI: T1
L4
JW
LB
Document: 350-231-
186-02
, I
ssu
e 2