Installation and Operation
DTR-51 & DTR-61 Ringdown Telephones
Page 12
Specifications
P
ERFORMANCE
A
UDIBLE
R
ANGE
F
REQUENCY
R
ESPONSE
300
–
3400
H
Z
R
ECEIVER
V
OLUME
A
DJUSTMENT
8
S
TEPS
,
2 dB/S
TEP
C
ONFORMS
T
O
R
ESIDENTIAL
A
ND
I
NDUSTRIAL
A
REAS
ETSI
TBR
38:
M
AY
1998
(
ACOUSTICS
)
ETSI
TBR
21:
J
ANUARY
1998
(T
ELEPHONE
N
ETWORK
)
R
INGER
O
UTPUT
>85
dB
@
1M
R
INGER
I
MPEDANCE
W
ITHOUT
R
ING
D
ETECT
R
ELAY
>7K
O
HMS
@25
H
Z
,
30-90
VAC
>4K
O
HMS
@
50H
Z
,
30-90
VAC
R
INGER
I
MPEDANCE
W
ITH
R
ING
D
ETECT
R
ELAY
>4K
O
HMS
@25
H
Z
,
30-90
VAC
(RDR
N
OT
R
ECOMMENDED
@
50H
Z
)
S
ET
I
MPEDANCE
600
O
HMS
N
OMINAL
M
AXIMUM
L
OOP
15,000
F
T
(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
22
-
100
mA
C
ONNECTION
M
ETHOD
T
ERMINAL
B
LOCKS
F
USE
-
M
AIN
T
ELEPHONE
C
IRCUIT
250
mA
–
A
UTO
R
ESET
F
USE
–
R
ING
D
ETECT
R
ELAY
5
A
MP
250
V
OLT
F
AST
B
LOW
E
NVIRONMENTAL
I
NGRESS
P
ROTECTION
R
ATING
IP66
O
PERATING
T
EMPERATURE
-30
O
TO
+60
O
C
(-22
O
TO
+140
O
F)
S
TORAGE
T
EMPERATURE
-50
O
TO
+80
O
C
(-58
O
TO
+176
O
F)
H
UMIDITY
0
TO
95%
RH
D
USTPROOF
F
ULLY
G
ASKETTED
E
NCLOSURE
M
ECHANICAL
H
OOK
S
WITCH
(C
RADLE
S
WITCH
)
L
IFE
>1
000
000
O
PERATIONS
H
OUSING
M
ATERIAL
G
LASS
F
ILLED
P
OLYESTER
(C
ARBON
L
OADED
)
H
ANDSET
M
ATERIAL
G
LASS
F
ILLED
P
OLYESTER
(C
ARBON
L
OADED
)
D
IMENSIONS
(H
X
W
X
D)
W
ALL
M
OUNTED
291
X
241
X
139
MM
(11.5
X
9.5
X
5.5
INCHES
)
N
ET
W
EIGHT
3.95
KG
(8.68
LBS
)
S
HIPPING
D
IMENSIONS
407
X
267
X
242
MM
(16
X
10.5
X
9.5
INCHES
)
S
HIPPING
W
EIGHT
4.8
KG
(10.5
LBS
)
M
OUNTING WALL STRENGTH
R
EQUIREMENT
15.8
KG
(34.8)
LBS
M
ICROPHONE
N
OISE
C
ANCELING
R
ECEIVER
H
EARING
A
ID
C
OMPATIBLE
(HAC)
M
OUNTING
D
ESK OR
W
ALL
W
IRING
A
CCESS
2
X
M20
C
ABLE
G
LAND
E
NTRY
P
OINTS
