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Products & Services Guide — Section
Indoor Industrial
O
M
6
Telephones
Guardian’s Indoor Industrial Telephones are used within
environments calling for rugged and dependable equipment
but don’t require certification.
A number of these phones were originally designed for a
specific purpose and have since been used for an extensive
list of additional applications. Our SCT family was originally
designed to meet the needs of potash mines. The ACT series
was designed to replace a Northern Telecom product that
had been widely used by railroads. The VRT phone is
specifically designed to withstand vandalism.
ISO-9001:2008 Certification
Today's Quality Creates Our Future
The DTT-20 Desktop with its Kydex 100® faceplate model
is a standard within industrial office locations. Whatever
your environment, we have a phone that will meet your
needs, both indoor and outdoor.
PSG7 D3
6
w w w.guardiante le co m .co m
Guardian Telecom Inc. is a world class designer,
manufacturer and distributor of telephone
communications equipment, accessories and
systems that can be found in use around the
globe. Located in Calgary, Canada, our modern
manufacturing facility is ISO certified, CSA, UL
and ATEX approved. Offices are located in
Calgary, Houston and the Middle East.
Working closely with end users we have developed
and market an extensive line of high quality
products for use in the demanding, industrial
world. We have carried on that tradition with the
design and introduction of our highly regarded
Zone 1, Zone 2 and IP66 Weather Proof DTT-Z &
DTR-Z models and our DTT & DTR telephones
Now, Guardian Telecom has combined the
benefits of VoIP with the outstanding quality
of our telephony products. A simple network
connection is all that is required with Guardian
Telecom’s Voice over Internet Protocol (VoIP)
industrial telephones.
From individual telephone units to complete
systems our focus on customers’ distinct needs
is addressed by customizing products whenever
practical. From features to colors, finishes to labels,
graphics, parts, enclosures and more.
Guardian continues to build an extensive network
of qualified distributors and manufacturer’s
representatives around the world. They are there to
help you make informed decisions based on your
communication needs, environmental factors,
regulatory requirements, budget considerations,
growth and scheduling.
Our Channel-Partner & Technical Support teams
work closely with our network of distributors and
manufacturer’s representatives around the world
and directly with clients to make sure that you
receive timely attention. Their practical experience,
in-depth product knowledge and understanding
of client applications will help guide you through
the product selection process.
Industrial Communications Worldwide
Toll free in North America 1-800-363-8010 Tel 403 258-3100
Fax 403 253-4967 5-mail info@guardiantelecom.com
Guardian Telecom's Product & Services Guide Catalogue is a combination of individual Category
Sections which include an in-depth selection of Product Data Sheets from our extensive Product
Lines including Telephones, VoIP, Page/Talk, Cable, Talk/Back, PA/GA equipment, Acoustic Booths,
Loudspeakers & Ringers and Accessories at the date of publishing.
Guardian Telecom
Product & Services Guide — Indoor Industrial Telephones
www.guardiantelecom.com
PSG7 D3
6-i
Based on a policy of continuous improvement, Guardian is constantly evaluating and redesigning
existing products, adding new features and introducing new items to the benefit of our customers.
Additional information can be found on our website at www.guardiantelecom.com.
Industrial Telephones
Steel Compact — SCT
6-1
SCT Steel Compact Telephones were originally designed for the harsh conditions of
Potash mines in Saskatchewan, Canada. The line was expanded to 4 different versions
which are utilized in a variety of applications. These telephones are standard with an
encapsulated circuit board which resists failures due to moisture, dust and vibration.
• SCT-10
• SCT-20
• SCT-30
• SCT-40
Teleseal Keypad, Curly Handset Cord and Volume Control Handset
Membrane Keypad, Curly Handset Cord and Volume Control on Keypad
Metal Keypad, Curly Handset Cord and Volume Control Handset
Metal Keypad, Armored Handset Cord and Volume Control Handset
Steel Compact — SCR
6-3
Guardian’s SCR-11 & SCR-41 Steel Compact Ringdown Telephones are designed for
harsh environments with special communication needs, ensuring high quality
communications under extreme working conditions. As soon as the receiver is lifted
the SCR-11 or SCR-41 automatically connects the caller to an assigned PBX location.
• SCR-11 Ringdown Telephone, Curly Handset Cord and Volume Control Handset
• SCR-41 Ringdown Telephone, Armored Handset Cord and Volume Control Handset
Vandal Resistant — VRT/VRR
6-5
Guardian Telecom’s VRT-40 Vandal Resistant Telephone and the VRR-41 Vandal Resistant
Ringdown Telephone are designed for sites prone to abuse, inclement weather and
noisy conditions. Lift the VRR-41 handset and PBX programming or an optional Auto
Dialer routes the call to its assigned location.
• VRT-40 Metal Keypad, Armored Handset Cord and Volume Control Handset
• VRT-41 Ringdown Telephone, Armored Handset Cord and Volume Control Handset
Industrial Desktop — DTT-20
6-7
Guardian Telecom’s rugged DTT-20 Industrial Desktop Phone is both dust and
corrosion resistant. The Kydex 100® plastic faceplate is easy to keep clean.
• DTT-20 Industrial Desktop Telephone
PSG7 D3
6-ii
Guardian Telecom
Product & Services Guide — Indoor Industrial Telephones
www.guardiantelecom.com
Guardian Telecom
Product & Services Guide — Indoor Industrial Telephones
www.guardiantelecom.com
PSG7 D3
6-iii
SCT Series
Steel Compact Telephones
FEATURES and BENEFITS
SCT-10
• Encapsulated circuit boards impervious to water
condensation and dust
• 16 gauge corrosion protected steel enclosure with
powder coat finish
• Heavy duty industrial volume control handset on
models SCT-10, SCT-30, SCT-40
• Volume control on keypad − SCT-20
• Rust and corrosion resistant stainless steel hardware
• Electret noise reducing microphone
• Magnetic reed hook-switch reduces moving parts subject to wear
• Service temperature range:
SCT-10, SCT-30, SCT-40 -76˚ to +176˚F ( -60˚ to +80˚C )
SCT-20 -40˚ to +140˚F ( -40˚ to +60˚C )
• Surge arrestor to prevent voltage spike damage
• Hearing aid compatible
• Electronic ringer for reliability
• Modular parts for easy service
• SCT-10 − Waterproof Teleseal Keypad and Curly Cord
• SCT-20 − Waterproof Membrane Keypad and Curly Cord
• SCT-30 − Weather and Dust Proof Metal Keypad and Curly Cord
• SCT-40 − Weather and Dust Proof Metal Keypad and Armored Cord
SCT-30
APPLICATIONS
SCT-20
SCT-40
Volume
Control Handset
on SCT-10, SCT-30
& SCT-40
Guardian’s SCT Series of Steel Compact
Telephones are engineered to deliver
reliable, high quality communications in
moderately harsh environments, where
standard telephones are not suitable.
Designed for use in industrial applications
and ideal for noisy areas.
• Refineries
• Power Generation Facilities
• Pulp and Paper Mills
• Food Processing Plants
• Chemical Plants
• Construction Sites
• Cement Plants
• Sewage Plants
• Drilling Rigs
• Hydroelectric Facilities
• Warehouses
• Mines
• Greenhouses
and more . . .
INSTALLATION and CONNECTABILITY
To provide flexibility and the potential for growth, Guardian’s
SCT telephones can be easily and economically connected to
any telephone network through standard wiring and parts.
Voice quality is unaffected when phones are connected within
15,000 ft. (~ 4,600 meters) of a main telephone switch supporting
single line telephones. Maintaining safety standards may require
wiring conduits or other considerations. Guardian telephones
are preset for tone operation, but are tone/pulse switchable.
In-service switching may require technical assistance. Order
the SCT separately or as part of an integrated system.
ACCESSORIES and OPTIONS
• 20C − 20’ ( 6m ) Curly cord for SCT-20
• 20VC − 20’ ( 6m ) Curly cord, volume control handset for SCT-10 & 30
• NC − Noise canceling microphone
• RC-SCT − Retainer clips – must be ordered with phone
(standard on SCT-40, not available on SCT-20)
• CH − Conduit hub
• BP − SCT/SCR Back plate
• Ring detect relay
• Off hook detect relay
6-1
OVERALL DIMENSIONS
5.1" [130mm]
2.7" [69mm]
5.0" [127mm]
9.0" [229mm]
6.4" [163mm]
2.2" [56mm]
SCT-10
SCT Series Steel Compact Telephones
ENGINEERING SPECIFICATIONS
ENVIRONMENTAL
ELECTRICAL PERFORMANCE
Audio Range Frequency Response
Dialing Method
Transmit Objective Loudness Rating (TOLR)
Receiver Volume Adjustment
Receiver Objective Loudness Rating (ROLR)
– receiver volume at maximum
– receiver volume at minimum
Side Tone Objective Loudness Rating (SOLR)
– receiver volume at maximum
– receiver volume at minimum
Memory Dial
SCT-20
Flash
Only
Mute
Ringer Output
FCC Ringer Equivalence
Set Impedance
Maximum Loop
}
300 - 3400 Hz
DTMF or 40/60 Pulse @10 PPS
Nominal -38 +/ - 3 dB
3 Steps Up / 2 Steps Down 8.1dB / 5.1 dB
Nominal 50 +/- 3 dB
41.9 +/- 3 dB
55.4 +/- 3 dB
Nominal 11 +/- 4 dB
7 +/- 4 dB
14 +/- 4 dB
10 Quick Dial Numbers 20 Digits Each
600 mSec Timed Disconnect
Press Key to Mute Transmitter
>85 dB
0.8 B
600 Ohms Nominal
15Kft ( ~4,600m ) of 22 AWG Wire
ELECTRICAL REQUIREMENTS
Ringer Sensitivity
Line Voltage
Loop Current
Connection Method
40 -100 V, 16 - 25 Hz
24 - 56 VDC
20 - 120 mA
Terminal Block / Surge Arrestor
MECHANICAL SPECIFICATIONS
Hook Switch ( Cradle Switch ) Life
Body Construction
Finish
Net Weight
Shipping Weight
Shipping Dimensions ( H x W x D )
Hand Set Construction
Mounting
Microphone
Receiver
Hardware Material
6-2
Telecom Inc.
>1 000 000 Operations
16 Ga CRS Steel
Corrosion Protected & Powder Coated
4.0 lbs ( 1.81 kg )
6.0 lbs ( 2.72 kg )
15.0” x 5.0” x 11.5” ( 381 x 127 x 293 mm )
High Impact ABS
Vertical Wall
Noise Reducing Electret
Hearing Aid Compatible
Stainless Steel
Temperature
Humidity
Corrosion Resistant
SCT-10, SCT-30, SCT-40 -76˚ to +176˚F ( -60˚ to +80˚C )
SCT-20 -40˚ to +140˚F ( -40˚ to +60˚C )
0 - 95% RH Non-Condensing
Full Gasket Faceplate
COMPLIANCE
Industry Canada/Doc
FCC
ORDERING INFORMATION
Order No.
P6960
P6270
P6268
P6972
1012-6721A
HQHCAN-22517-TE-E
Warranty: One year parts and labor
Description
SCT-10 Teleseal Keypad/ Volume Control Handset/Curly Cord
SCT-20 Membrane Keypad/Volume Control on Keypad/Curly Cord
SCT-30 Metal Keypad/Volume Control Handset/Curly Cord
SCT-40 Metal Keypad/Volume Control Handset/Armored Cord
Options
20C
20VC
36AVC
72AVC
NC
CH
RC-SCT
BP - SCT/SCR
20’ (6.1m) Curly Cord for SCT-20
20’ (6.1m) Curly Cord, Volume Control Handset for SCT-10 & SCT-30
36” (.9m) Armored Handset Cord
72” (1.8m) Armored Handset Cord
Noise Canceling Microphone
Conduit Hub
Retainer Clips – must be ordered with phone (standard on SCT-40, not
available on SCT-20)
Back Plate for SCT/SCR phones
Distributed by:
ISO-9001:2008 Certification
Today's Quality Creates Our Future
Guardian pursues a policy of continuous improvement, therefore specifications are subject to change without notice.
7552 - 10th Street N.E., Calgary, Alberta, Canada T2E 8W1
Telephone: 403 258-3100 Facsimile: 403 253-4967
1-800-363-8010 (North America)
info@guardiantelecom.com
www.guardiantelecom.com
SCT 120312
SCR Series
SCR-11
Steel Compact
Ringdown Telephones
FEATURES and BENEFITS
SCR-41
• Encapsulated circuit boards impervious to water
condensation and dust
• 16 gauge zinc dichromate plated steel enclosure with
powder coat finish
• Heavy duty industrial volume control handset
• Rust and corrosion resistant stainless steel hardware
• Electret noise reducing microphone
• Magnetic reed hook-switch reduces moving parts
subject to wear
• Service temperature range from -76˚ to +176˚F ( -60˚ to +80˚C )
• Surge arrestor to prevent voltage spike damage
• Hearing aid compatible
• Electronic ringer for reliability
• Modular parts for easy service
• SCR-11 − Curly Cord
• SCR-41 − Armored Cord
APPLICATIONS
These telephones are designed for use in harsh industrial
environments such as:
Volume Control
Handset
Guardian’s SCR-11 & SCR-41 Steel
Compact Ringdown Telephones are
designed for harsh environments
with special communication needs,
ensuring high quality communications
under extreme working conditions.
Lift the handset and PBX programming
or an optional Auto Dialer routes the
call to its assigned location
• Refineries
• Power Generation Facilities
• Pulp and Paper Mills
• Food Processing Plants
• Chemical Plants
• Construction Sites
• Cement Plants
• Sewage Plants
• Drilling Rigs
• Hydroelectric Facilities
• Warehouses
• Mines
• Greenhouses
and more . . .
INSTALLATION and CONNECTABILITY
To provide flexibility and the potential for growth, Guardian’s
SCR Ringdown telephones can be easily and economically
connected to any telephone network through standard wiring
and parts. Voice quality is unaffected when phones are connected
within 15,000 ft. (~ 4,600 meters) of a main telephone switch
supporting single line telephones. Maintaining safety standards
may require wiring conduits or other considerations. Order
Guardian SCR Ringdown telephones separately or as part of
an integrated system.
ACCESSORIES and OPTIONS
• Ring detect relay
• Off-hook detect relay
• 20VC − 20’ ( 6.1m ) curly cord, volume control handset for SCR-11
• NC − Noise canceling microphone
• RC-SCR − Retainer clips – must be ordered with phone
(standard on SCR-41)
• CH − Conduit hub
• BP − SCT/SCR Back plate
• AD − Auto Dialer
6-3
OVERALL DIMENSIONS
5.1" [130mm]
2.7" [69mm]
5.0" [127mm]
9.0" [229mm]
6.4" [163mm]
2.2" [56mm]
SCR-11
SCR Series Steel Compact Ringdown Telephones
ENGINEERING SPECIFICATIONS
ENVIRONMENTAL
ELECTRICAL PERFORMANCE
Audio Range Frequency Response
Connection Method
Transmit Objective Loudness Rating (TOLR)
Receiver Volume Adjustment
Receiver Objective Loudness Rating (ROLR)
– receiver volume at maximum
– receiver volume at minimum
Side Tone Objective Loudness Rating (SOLR)
– receiver volume at maximum
– receiver volume at minimum
Ringer Output
FCC Ringer Equivalence
Set Impedance
Maximum Loop
300 - 3400 Hz
Hotline Operation
Nominal -38 + / - 3 dB
3 steps up / 2 steps down 8.1dB / 5.1 dB
Nominal 50 +/- 3 dB
41.9 +/- 3 dB
55.4 +/- 3 dB
Nominal 11 +/- 4 dB
7 +/- 4 dB
14 +/-4 dB
>85 dB
0.9 B
600 Ohms Nominal
~15Kft (4,600m) of 22 AWG Wire
Temperature
Humidity
Corrosion Resistant
-76˚ to +176˚F ( -60˚ to +80˚C )
0- 95% RH Non-Condensing
Full Gasket Faceplate
COMPLIANCE
Industry Canada
FCC
1012-6721A
HQHCAN - 22517 - TE - E
ELECTRICAL REQUIREMENTS
Ringer Sensitivity
Line Voltage
Loop Current
Connection Method
40 -100 V, 16 - 25 Hz
24 - 56 VDC
20 - 120 mA
Terminal Block / Surge Arrestor
MECHANICAL SPECIFICATIONS
Hook Switch ( Cradle Switch ) Life
Body Construction
Finish
Net Weight
Shipping Weight
Shipping Dimensions ( L x W x D )
Hand Set Construction
Mounting
Microphone
Receiver
Hardware Material
>1 000 000 Operations
16 Ga CRS Steel
Zinc Dichromate Plated & Powder Coated
4 lbs ( 1.8 kg )
6 lbs ( 2.7 kg )
15.0” x 5.0” x 11.5” ( 381 x 127 x 293 mm )
High Impact ABS
Vertical Wall
Noise Reducing Electret
Hearing Aid Compatible
Stainless Steel
ORDERING INFORMATION
Order No.
P6961
P6970
Description
SCR-11
SCR-41
Options
20VC
36AVC
72AVC
NC
CH
RC-SCR
BP-SCT/SCR
AD
Warranty: One year parts and labor
Ringdown/Volume Control Handset/Curly Cord
Ringdown/Volume Control Handset/Armored Cord
20’ (6.1m) Curly Cord, Volume Control Handset – For SCR-11
36” (.9m) Armored Handset Cord
72” (1.8m) Armored Handset Cord
Noise Canceling Microphone
Conduit Hub
Retainer Clips – must be ordered with phone (standard on SCR-41)
Back Plate for SCT/SCR phones
AutoDialer
Distributed by:
6-4
Telecom Inc.
ISO-9001:2008 Certification
Today's Quality Creates Our Future
Guardian pursues a policy of continuous improvement, therefore specifications are subject to change without notice.
7552 - 10th Street N.E., Calgary, Alberta, Canada T2E 8W1
Telephone: 403 258-3100 Facsimile: 403 253-4967
1-800-363-8010 (North America)
info@guardiantelecom.com
www.guardiantelecom.com
SCR 120312
VRT-40
Vandal Resistant Telephone
VRR-41
Vandal Resistant
Ringdown Telephone
VRR-41
VRT-40
Volume Control
Handset
FEATURES and BENEFITS
• Rugged 12 gauge steel enclosure
• Corrosion protected powder coated faceplate & housing
• Heavy duty industrial volume control armored cord handset
• Magnetic reed hook switch reduces moving parts subject to wear
• Encapsulated circuitry impervious to water, condensation & dust
• Surge arrestor to prevent voltage spike damage
• Electret noise reducing microphone for clear communication
• Temperature range -76˚ to +176˚F ( -60˚ to +80˚C )
• Water proof connections & stainless steel fittings for longer life
• Modular parts for easy service
• Hearing aid compatible
• Electronic ringer for reliability
• Tone or pulse dialing for universal configuration
• Tamper resistant screws
• Easily connected to any single line analog CO or
PABX telephone line
• Handset retainers to maintain on-hook status
• Lift the VRR-41 handset and PBX programming or an optional
Auto Dialer routes the call to its assigned location
APPLICATIONS
Guardian Telecom’s VRT-40 Vandal Resistant
Telephone and the VRR-41 Vandal Resistant
Ringdown Telephone are designed for sites
prone to abuse, inclement weather and
noisy conditions.
• Public Transit Sites
• Highway Tunnels
• Parks
• University Campuses
• Correctional Facilities
• Outdoor Sporting Facilities
• Parking Structures
• Plant Entry Gates
• Public Access Areas
and more . . .
INSTALLATION and CONNECTABILITY
To provide flexibility and potential for growth, telephones are
easily and economically connected to any telephone network
by standard wiring and parts. Voice quality is unaffected when
phones are connected within 15,000 feet (~4,600 meters) of
a main telephone switch accepting single line telephones.
Guardian telephones are tone/pulse switchable. Initial settings
are to tone prior to delivery (unless requested otherwise).
In-service switching may require technical assistance.
ACCESSORIES and OPTIONS
Faceplate finish
− Nickel Prism
Housing finish
− Hammertone Grey
• Ring detect relay
• Off-hook detect relay
• Strobe light
• NC − Noise canceling microphone
• AD − Auto Dialer
6-5
OVERALL DIMENSIONS
4.6" [118mm]
3
MNO
5
6
TUV
WXY
7
8
9
*
0
#
5.0" [127mm]
12.2" [310mm]
DE F
2
J KL
4
8.2" [209mm]
12.2" [310mm]
AB C
1
GHI
PR S
4.5" [114mm]
9.5" [241mm]
8.2" [209mm]
2.8" [70mm]
VRT-40 Vandal Resistant Telephone • VRR-41 Vandal Resistant Ringdown Telephone
ENGINEERING SPECIFICATIONS
MECHANICAL SPECIFICATIONS
ELECTRICAL PERFORMANCE
Audio Range Frequency Response
Dialing method
Transmit Objective Loudness Rating (TOLR)
Receiver Volume Adjustment
Receiver Objective Loudness Rating (ROLR)
– receiver volume at maximum
– receiver volume at minimum
Side Tone Objective Loudness Rating (SOLR)
– receiver volume at maximum
– receiver volume at minimum
Ringer Output
FCC Ringer Equivalence
Set Impedance
Maximum Loop
300 - 3400 Hz
DTMF or 40/60 Pulse @10 PPS
Nominal -38 + / - 3 dB
3 steps up / 2 steps down 8.1dB / 5.1 dB
Nominal 50 +/- 3 dB
41.9 +/- 3 dB
55.4 +/- 3 dB
Nominal 11 +/- 4 dB
7 +/- 4 dB
14 +/- 4 dB
>75 dB
0.9 B
600 Ohms Nominal
15Kft (~4,600m) of 22 AWG Wire
Hook Switch ( Cradle Switch ) Life
Body Construction
Finish
Net Weight
Shipping Weight
Shipping Dimensions ( L x W x D )
Hand Set Construction
Mounting
Microphone
Receiver
Hardware Material
>1 000 000 Operations
12 Ga Steel
Corrosion Protected & Powder Coated
14 lbs ( 6.25 kg )
18 lbs ( 8.2 kg )
16.0” x 10.5” x 9.5” ( 407 x 267 x 242 mm )
High Impact ABS
Vertical Wall
Noise Reducing Electret
Hearing Aid Compatible
Stainless Steel
ORDERING INFORMATION
Warranty: One year parts and labor
ELECTRICAL REQUIREMENTS
Ringer Sensitivity
Line Voltage
Loop Current
Connection Method
40 -100 V, 16 - 25 Hz
24 - 56 VDC
20 - 120 mA
Terminal Block / Surge Arrestor
ENVIRONMENTAL
Weather Proof Enclosure
Temperature
Humidity
Corrosion Resistant
Type 3R
-76˚ to +176˚F ( -60˚ to +80˚C )
0 - 95% RH Non-Condensing
Full Gasket Faceplate
COMPLIANCE
Industry Canada
FCC
1012-6721A
HQHCAN - 22517 - TE - E
Order No. Description
P5012
VRT-40 Telephone/Metal Keypad/Volume Control Handset/Armored Handset Cord
P5013
VRR-41 Ringdown Telephone/Volume Control Handset/Armored Handset Cord
Options
NC
AD
Noise Canceling Microphone
Auto Dialer
Distributed by:
6-6
Telecom Inc.
ISO-9001:2008 Certification
Today's Quality Creates Our Future
Guardian pursues a policy of continuous improvement, therefore specifications are subject to change without notice.
7552 - 10th Street N.E., Calgary, Alberta, Canada T2E 8W1
Telephone: 403 258-3100 Facsimile: 403 253-4967
1-800-363-8010 (North America)
info@guardiantelecom.com
www.guardiantelecom.com
VRTVRR 120312
DTT-20
Industrial Desktop Telephone
FEATURES and BENEFITS
DTT-20 Industrial
Desktop Telephone
• Water resistant membrane keypad for added hygiene and
resistance to fluids
• Heavy duty handset and cord
• Magnetic switch with no moving parts for extended life
• Encapsulated circuit boards are impervious to water, tropical
humidity and mine condensation
• Service temperature from -40˚ to +140˚F (-40˚ to +60˚C)
• Kydex 100® plastic faceplate is 94V-O fire retarding, durable,
impact resistant and easy to clean
• Rotating the base allows the telephone to be wall mounted
• Electret noise reducing microphone
• Volume adjustment and muting
• Ten-number memory, redial and recall
APPLICATIONS
This telephone is designed for use in locations where the
humidity or dust level is high:
• Processing Plants
• Refineries
• Pulp & Paper Mills
• Chemical Plants
• Marine Drilling Rigs
• Mine Offices
• Bulk Loading Stations
and more . . .
INSTALLATION and CONNECTABILITY
Guardian Telecom’s rugged DTT-20 Industrial
Desktop Telephone is both dust and corrosion
resistant. The Kydex 100® plastic faceplate is
easy to keep clean.
To provide flexibility and the potential for system growth,
Guardian’s DTT-20 Industrial Desk Telephone can be easily
and economically connected to any telephone network
through standard wiring and components. Voice quality is
unaffected when phones are connected within 15,000 ft.
(~ 4,600 meters) of a main telephone switch which accepts
single line telephones.
Guardian telephones are tone/pulse switchable (the switch
is inside telephone). Unless requested otherwise, the initial
settings are set to tone prior to delivery.
6-7
OVERALL DIMENSIONS
5.9” [149mm]
8.1” [205mm]
9.3” [237mm]
7.8” [199mm]
DESK MOUNT VIEW
FRONT VIEW
WALL MOUNT VIEW
DTT-20 Industrial Desk Telephone
ENGINEERING SPECIFICATIONS
MECHANICAL SPECIFICATIONS
ELECTRICAL PERFORMANCE
Audio Range Frequency Response
Dialing method
Transmit Objective Loudness Rating (TOLR)
Receiver Volume Adjustment
Receiver Objective Loudness Rating (ROLR)
– receiver volume at maximum
– receiver volume at minimum
Side Tone Objective Loudness Rating (SOLR)
– receiver volume at maximum
– receiver volume at minimum
Memory Dial
Flash
Mute
Ringer Output
FCC Ringer Equivalence
Set Impedance
Maximum Loop
300 - 3400 Hz
DTMF or 40/60 Pulse @10 PPS
Nominal -41 +/ - 3 dB
3 Steps Up / 2 Steps Down 8.1dB / 5.1 dB
Nominal 50 +/- 3 dB
41.9 +/- 3 dB
55.4 +/- 3 dB
Nominal 11 +/- 4 dB
7 +/- 4 dB
14 +/-4 dB
10 Quick Dial Numbers 20 Digits Each
600 msec Timed Disconnect
Press Key to Mute Transmitter
>80 dB
0.8 B
600 Ohms Nominal
15Kft ( ~4,600m ) of 22 AWG Wire
Hook Switch ( Cradle Switch ) Life
Body Construction
Finish
Net Weight
Shipping Weight
Shipping Dimensions ( L x W x D )
Faceplate Construction
Hand Set Construction
Optional Mounting
Microphone
Receiver
Hardware Material
>1 000 000 Operations
16 Ga Steel
Corrosion Protected & Powder Coated
5.5 lbs ( 2.5 kg )
8.5 lbs ( 3.9 kg )
16.0” x 10.5” x 9.5” ( 407 x 267 x 242 mm )
Kydex 100®
High Impact ABS
Vertical Wall
Noise Reducing Electret
Hearing Aid Compatible
Stainless Steel
ELECTRICAL REQUIREMENTS
Ringer Sensitivity
Line Voltage
Loop Current
Connection Method
40 -100 V, 16 - 25 Hz
24 - 56 VDC
20 - 120 mA
8’ ( 2.4 m ) Cable to Surge Arrestor in Telephone
ORDERING INFORMATION
ENVIRONMENTAL
Temperature
Humidity
-40˚ to +140˚F ( -40˚ to +60˚C )
0 - 95% RH Non-Condensing
COMPLIANCE
Industry Canada
FCC
1012-6721A
HQHCAN - 22517 - TE - E
Order No.
P6580
Description
DTT-20
Options
NC
20C
Noise Canceling Microphone
20’ (6.1m) Curly Cord
Warranty: One year parts and labor
Industrial Desktop Telephone
Distributed by:
6-8
Telecom Inc.
ISO-9001:2008 Certification
Today's Quality Creates Our Future
Guardian pursues a policy of continuous improvement, therefore specifications are subject to change without notice.
7552 - 10th Street N.E., Calgary, Alberta, Canada T2E 8W1
Telephone: 403 258-3100 Facsimile: 403 253-4967
1-800-363-8010 (North America)
info@guardiantelecom.com
www.guardiantelecom.com
DTT20 120312
Sections
Guardian Telecom’s Product & Services Guide Catalogue is a combination of individual Category Section Publications
Guardian
1
About Guardian Telecom
• Building on a legacy of design and service
• Communications: Easy, Reliable and Safe
• More Choices, Selections and Services
• Standard Features
• Options & Accessories
•
•
•
•
•
Product and Project Consultation
Commissioning Services
Sound Studies
Training
Maintenance, Cleaning, Trouble
Shooting & Refurbishment
• Custom Design
• Page/Talk, Telephone, PA/GA
and Talk/Back Systems
• Standards and Classifications
Knowledge Base
Glossary
Products
Telephones Explosion Proof
ATEX-IEC
Hazardous Area
2
Indoor Industrial
3
Emergency
Page/Talk Explosion Proof
4
Correctional
6
7
VoIP Outdoor/Indoor Industrial VoIP
Telephones
PA/GA
10
10
10
Stations
System Cable
System Components
12
13
Amplifiers
16
Acoustic Booths
Loudspeakers/Ringers Explosion Proof
18
Hazardous Area
19
PSG7 D3
14
16
17
Guardian Telecom
9
Emergency VoIP
15
Product Index
Institutional
Talk/Back Explosion Proof
Third-Party
Page Station
Replacement
5
8
Indoor Industrial VoIP
11
Guardian represents DNH,
Federal Signal, MEDC and
TOA, and has access to an
extensive range of world
class leading manufacturers.
Outdoor/Indoor Industrial
Contact a Channel Partner
or visit Guardian’s website
www.guardiantelecom.com
for additional information on
Hazardous Area, ATEX-IEC,
General Area and Explosion
Proof Loudspeakers & Ringers.
ATEX-IEC
20
General Area
21
Accessories Telephone
& Enclosures
22
Page/Talk
23
24
25
Product & Services Guide — Indoor Industrial Telephones
www.guardiantelecom.com
7552 - 10th Street N.E., Calgary, Alberta, Canada T2E 8W1
Telephone: 403 258-3100 Facsimile: 403 253-4967
1-800-363-8010 (North America)
info@guardiantelecom.com
All content including the "Guardian Telecom" logo, images, graphics and descriptions
are not to be used without the expressed written authorization of Guardian Telecom Inc.,
Calgary, Alberta, Canada. All other names and logos are the trademarks or registered
trademarks of their respective companies.
Guardian pursues a policy of continuous improvement, therefore product, content and
specifications are subject to change without notice. Design, specifications and release
dates are subject to change without notice.
Guardian Telecom
Product & Services Guide — Indoor Industrial Telephones
www.guardiantelecom.com
PSG7 D3
Canada USA Middle East
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