Guardian Telecom Inc.
Installation and Operation
Model HR71
Page 6
Engineering Specifications
E
LECTRICAL
P
ERFORMANCE
A
UDIBLE
R
ANGE
F
REQUENCY
R
ESPONSE
300
–
3400
H
Z
T
RANSMIT
O
BJECTIVE
L
OUDNESS
R
ATING
(TOLR) -41
+/-
4
dB
R
ECEIVE
O
BJECTIVE
L
OUDNESS
R
ATING
(ROLR) T
YPICAL
52
+/-
3
dB
S
IDE
T
ONE
O
BJECTIVE
L
OUDNESS
R
ATING
(SOLR) T
YPICAL
11
+/-
4
dB
R
INGER
O
UTPUT
>80
dB
FCC
R
INGER
E
QUIVALENCE
0.9B
S
ET
I
MPEDANCE
600
OHMS
N
OMINAL
M
AXIMUM
L
OOP
15,000
F
EET
(4,600
M
ETERS
)
OF
22
AWG
C
OPPER
E
LECTRICAL
R
EQUIREMENTS
R
INGER
S
ENSITIVITY
40
–
100
V,
16
–
25
H
Z
L
INE
V
OLTAGE
24
–
56
VDC
L
OOP
C
URRENT
20
-
120
M
A
C
ONNECTION
M
ETHOD
S
URGE
A
RRESTOR
/
T
ERMINAL
B
LOCK
E
NVIRONMENTAL
W
EATHERPROOF
E
NCLOSURE
NEMA
3R
T
EMPERATURE
-40
O
TO
+50
O
C
M
ECHANICAL
H
OOK
S
WITCH
(C
RADLE
S
WITCH
)
L
IFE
>1
000
000
O
PERATIONS
B
ODY
C
ONSTRUCTION
16
GAUGE STEEL
,
ZINC CHROMATE PLATED
AND POWDER COATED
D
IMENSIONS
9
X
5
X
5.2
INCHES
(229
X
127
X
132
MM
)
N
ET
W
EIGHT
4
LBS
(1.82
KG
)
H
ANDSET
M
ATERIAL
H
IGH
I
MPACT
ABS
M
ICROPHONE
N
OISE
R
EDUCING
E
LECTRET
O
PTIONAL
M
ICROPHONE
N
OISE
C
ANCELING
D
YNAMIC
R
ECEIVER
H
EARING
A
ID
C
OMPATIBLE
S
TANDARD
M
OUNTING
V
ERTICAL
W
ALL
C
ONNECTION
F
ITTINGS
7/8”
D
IAM
.
O
PENING
F
OR
O
WNER SUPPLIED
FITTING
H
ARDWARE
M
ATERIAL
S
TAINLESS
S
TEEL
