Guardian Telecom Inc.
Installation and Operation
Model WRT
Page 11
Engineering Specifications
E
LECTRICAL
P
ERFORMANCE
A
UDIBLE
R
ANGE
F
REQUENCY
R
ESPONSE
300
–
3400
H
Z
D
IALING
M
ETHOD
DTMF
OR
40/60
P
ULSE
A
T
10
PPS
T
RANSMIT
O
BJECTIVE
L
OUDNESS
R
ATING
(TOLR) -38
+/-
3
dB
R
ECEIVER
V
OLUME
A
DJUSTMENT
+8.1
/
-5.1
dB
IN
S
TEPS OF
2.7
dB
R
ECEIVE
O
BJECTIVE
L
OUDNESS
R
ATING
(ROLR)
-A
T
N
OMINAL
V
OLUME
L
EVEL
50
+/-
3
dB
-A
T
M
AXIMUM
V
OLUME
L
EVEL
42
+/-
3
dB
-A
T
M
INIMUM
V
OLUME
L
EVEL
55.5
+/-
3
dB
S
IDE
T
ONE
O
BJECTIVE
L
OUDNESS
R
ATING
(SOLR)
-A
T
N
OMINAL
V
OLUME
L
EVEL
11
+/-
4
dB
-A
T
M
AXIMUM
V
OLUME
L
EVEL
7
+/-
4
dB
-A
T
M
INIMUM
V
OLUME
L
EVEL
14
+/-
4
dB
M
EMORY
D
IAL
(WRT-20
ONLY
) 10
R
EGISTERS OF
20
D
IGITS
E
ACH
F
LASH
(WRT-20
ONLY
) 600
MSEC
T
IMED
D
ISCONNECT
M
UTE
(WRT-20
ONLY
) P
RESS
K
EY TO
M
UTE
T
RANSMITTER
R
EDIAL
(WRT-20
ONLY
) 31
D
IGITS
M
AXIMUM
R
INGER
O
UTPUT
75
dB
M
AXIMUM
FCC
R
INGER
E
QUIVALENCE
0.8B
S
ET
I
MPEDANCE
600
O
HMS
N
OMINAL
M
AXIMUM
L
OOP
15,000
FT
(4,600
M
)
OF
22
AWG
C
OPPER
E
LECTRICAL
R
INGER
S
ENSITIVITY
40
–
100
V,
16
–
25
H
Z
L
INE
V
OLTAGE
24
–
56
VDC
L
OOP
C
URRENT
20
-
120
mA
C
ONNECTION
M
ETHOD
S
URGE
A
RRESTOR
F
USE
¼
A
MP
250
V
OLT
3AG
F
AST
B
LOW
E
NVIRONMENTAL
W
EATHERPROOF
E
NCLOSURE
NEMA
3R
T
EMPERATURE
-40
O
TO
+60
O
C
(-40
O
TO
+140
O
F)
H
UMIDITY
0
TO
95%
RH
D
USTPROOF
F
ULLY
G
ASKETTED
E
NCLOSURE
C
ORROSION
R
ESISTANT
MIL-STD-810E
S
ALT
F
OG
M
ECHANICAL
H
OOK
S
WITCH
(C
RADLE
S
WITCH
)
L
IFE
>1
000
000
O
PERATIONS
B
ODY
C
ONSTRUCTION
GE
V
ALOX
357
®
E
NGINEERING
P
OLYMER
D
IMENSIONS
12
X
9.6
X
3.9
INCHES
(305
X
245
X
99
MM
)
N
ET
W
EIGHT
6.5
LBS
(2.95
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
(HAC)
S
TANDARD
M
OUNTING
V
ERTICAL
W
ALL
W
IRING
A
CCESS
7/8”
D
IAM
.
O
PENING
F
OR
O
WNER
S
UPPLIED
F
ITTING
H
ARDWARE
M
ATERIAL
S
TAINLESS
S
TEEL