Guardian Telecom DP700 Owner's manual

Guardian Telecom Inc.
7000 Fisher Road S.E., Calgary, Alberta, Canada T2H 0W3
Telephone [phone] Fax [phone]
Website: www.guardiantelecom.com
P004214 Rev. D 5/5/2004 4:08 PM
Hazardous Area Desk Telephone
Model DP700
Installation and Operation

Guardian Telecom Inc
Installation and Operation
Model DP700
Page 2
TABLE OF CONTENTS
Overview...................................................................................................................................3
Equipment List.........................................................................................................................3
Features....................................................................................................................................3
Installing the DP700 Telephone............................................................................................6
Description Of Features.........................................................................................................7
Operating Instructions ............................................................................................................8
Engineering Specifications ..................................................................................................10
Government Certification.....................................................................................................12
Warranty.................................................................................................................................14
Disclaimer...............................................................................................................................14
Warning...................................................................................................................................14
Service Telephone Number.................................................................................................14
Feedback................................................................................................................................14
Guardian Product Return.....................................................................................................15
TABLE OF FIGURES
Figure 1 - Dimensions...........................................................................................................4
Figure 2 - Mounting...............................................................................................................4
Figure 3 - Internal Wiring......................................................................................................5
Figure 4 - Mechanical Assembly.........................................................................................5
Figure 5 - ID and Compliance............................................................................................11

Guardian Telecom Inc
Installation and Operation
Model DP700
Page 3
Overview
The DP700 Telephone is designed to provide safe, reliable communication in Class I, Division 2
hazardous locations. The unit is housed in a rugged enclosure which makes it ideal for use in
harsh industrial applications.
The DP700 can be wall mounted if desired.
Equipment List
(1) DP700 Industrial Telephone
(1) Installation & Operation Manual
Features
Feature Description
Enclosure •16 AWG Cold rolled steel Zinc
Dichromate plated and powder
coated
Tone (DTMF)/ Pulse Operation •Configured to operate on tone
exchanges (DTMF). Pulse dialing
may be enabled.
Hook Switch •Magnetic, no mechanical parts.
Hearing-aid Compatible •Compatible with inductively coupled
hearing-aid devices
Superior audio clarity •Internal circuitry optimizes the side
tone level for areas with high
background noise levels
Noise Reducing Microphone •Noise reducing microphone aids in
clarity of transmission in noisy
areas
Key Pad •Durable standard 3x4 keypad with
additional feature buttons.
Surge Arrestor •Protects circuitry from damage from
power surges.

Guardian Telecom Inc
Installation and Operation
Model DP700
Page 4
FRONT VIEW
9.3 [237]
5.9 [149]
WALL MOUNT VIEW
7.8 [199]
8.1 [205]
Figure 1 - Dimensions
Figure 2 - Mounting
For Wall mounting, use the holes indicated.
4.4 [113]
1.5 [37]
0.6 [16]
4 PLCS. 4.6 [117]
Ø0.19

Guardian Telecom Inc
Installation and Operation
Model DP700
Page 5
Figure 3 - Internal Wiring
Figure 4 - Mechanical Assembly
GREEN FOR GROUND
BLACK AND WHITE FOR TIP AND RING
CABLE: 3 COND. 60CY 300V 14AWG
CABLE GLAND
CLASS I DIV. 2
CHASSIS
BRACKET
MOUNTING
HANDSET COVER
TELEPHONE
FRONT
TONE/PULSE JUMPER
FUSE
RINGER
GROUND
SURGE ARRESTOR
TIP
RING
TELEPHONE CIRCUIT BOARD REED SWITCH

Guardian Telecom Inc
Installation and Operation
Model DP700
Page 6
Installing the DP700 Telephone
•Follow all appropriate electrical codes and use only approved electrical
fittings for the installation. See: Government
Certification.
•To change the Tone/Pulse setting to pulse, if required: Tip: The DP700 is factory
preset for DTMF tone.
oRemove the four top screws and carefully remove the cover.
oMove the jumper from pins 1 & 2 of the Tone/Pulse connector to
pins 2 & 3.
oTo change the setting back to tone move the jumper back to
pins 1 & 2.
oReplace the cover and the four screws.
Note: The model DP700 can be either desk mounted or wall mounted. See: Figure 2 - Mounting
•If the DP700 is to be desk mounted simply place it in the desired location.
•If the DP700 is to be wall mounted follow these instructions. See: Figure 3 - Internal
Wiring
oRemove the four top screws and carefully remove the cover. See: Figure 4 -
Mechanical Assembly
oDisconnect the harness plugs and set the cover aside.
oUsing a flat screwdriver or similar instrument carefully pry the chassis
away from the base at the four corners.
oLoosen the locknut on the forty-five degree cable gland, rotate the
gland 180 degrees and re-fasten the locknut.
oSecure the base to the wall at the desired location.
oRotate the chassis 180 degrees from the original orientation and snap
it back into the base.
oRotate the cover 180 degrees from the original orientation and
reconnect the harness plugs.
oReplace the cover and the four screws.
•Ensure that none of the electrical connection circuits are live.
•Connect the Tip, Ring and Ground conductors in the cable provided to the
telephone line at a junction box. Note: Tip and Ring are
not polarity sensitive.
•Test the unit by calling to and from another unit on the exchange.

Guardian Telecom Inc
Installation and Operation
Model DP700
Page 7
Description Of Features
Tone (DTMF) operation:
The telephone is configured to operate on tone (DTMF) exchanges (factory set).
Pulse dialing may be enabled as explained on page 6.
Magnetic-Reed hook-switch operation:
The reed switch is a magnetic switch internal to the telephone, and will activate on-
hook/off-hook when the handset is placed in or removed from the telephone cradle.
Wall mount:
The DP700 Series telephone can be easily mounted on wall structures.
Epoxy resin circuitry coating:
All of the internal circuit boards are encapsulated by an epoxy resin which is resistant
to corrosive agents (i.e. H2S, SO2, NH3) and environments of high humidity.
Hearing-aid compatible:
All DP700 Series telephones are compatible with inductively-coupled hearing-aid
devices.
Superior audio clarity for noisy areas:
The circuit design optimizes the side tone level for better intelligibility in locations with
high background noise.
Noise Reducing Microphone:
All sets are provided with a noise reducing microphone to aid clarity in noisy
environments.
Ten Number Repertory Dialer:
Up to ten numbers may be stored in the telephone for fast and easy access.
Flash:
The flash button will invoke a 600 ms timed loop break. In pulse dialing mode the
flash option is inoperable.
Recall:
The Recall button is used to disconnect the line without replacing the handset in the
cradle.

Guardian Telecom Inc
Installation and Operation
Model DP700
Page 8
Softer and Louder:
The Softer and the Louder buttons are used as a volume control for the receiver earpiece.
Each press on the Softer or Louder button will decrease or increase the loudness by 2.7 dB
(+8.1 dB/-5.4 dB in 5 steps).
Mute:
The function of this key is enabled in speech mode only. Pressing the Mute key will disable
the microphone amplifier, and pressing the Mute key again will revive the microphone
amplifier.
Redial:
The Redial button will recall the last manually dialed number. The maximum storage
capacity of the Redial Memory is 31 digits.
Pause:
Pause is used during programming to insert a 3 second pause within the first 5 digits.
Operating Instructions
Memory key programming:
There are 10 direct memory access registers which can be
assigned to the 10 numeric keys. Each register can contain up to
20 digits including Pauses.
To program the direct memory access keys proceed as follows.
•Take the phone OFF HOOK.
•Press the Program key. The phone is now in programming
mode.
•Press the Memory key and one of the numerical keys (0-9). The
number selected will be assigned to this memory location.
•Enter the phone number to be stored (for example 1-800-363-
8010). Valid entries are 0-9, *, #, or Pause. If you are located in
a business where you must dial 9 or some other digit(s) to
access an outside line, the example above would be 9 Pause
(press the Pause key) 1-800-363-8010.
•Press Enter to exit the programming mode.

Guardian Telecom Inc
Installation and Operation
Model DP700
Page 9
Automatic memory Dialing:
Ten (10) preprogrammed direct memory access registers can be used for quick dialing as
follows:
•Take the phone OFF HOOK.
•Press the Memory key.
•Select one of the numerical keys (0-9) (the memory locations).
•The number stored in the register will be accessed and dialed.

Guardian Telecom Inc
Installation and Operation
Model DP700
Page 10
Engineering Specifications
ELECTRICAL PERFORMANCE
AUDIBLE RANGE FREQUENCY RESPONSE 300 -3400 HZ
DIALING METHOD DTMF or 40/60 PULSE AT 10 PPS
TRANSMIT OBJECTIVE LOUDNESS RATING (TOLR) -41 +/- 3 dB
RECEIVER VOLUME ADJUSTMENT 13.5 dB IN 2.7 dB STEPS,3STEPS UP AND 2STEPS DOWN
RECEIVE OBJECTIVE LOUDNESS RATING (ROLR)
-RECEIVER VOLUME AT MAXIMUM
-RECEIVER VOLUME AT MINIMUM
TYPICAL 50 +/- 3 dB
42 +/- 3 dB
55.5 +/- 3 dB
SIDE TONE OBJECTIVE LOUDNESS RATING (SOLR)
-RECEIVER VOLUME AT MAXIMUM
-RECEIVER VOLUME AT MINIMUM
TYPICAL 11 +/- 4 dB
7 +/- 4 dB
14 +/- 4 dB
MEMORY DIAL 10 REGISTERS OF 20 DIGITS EACH
FLASH 600 MSEC TIMED DISCONNECT
MUTE PRESS KEY TO MUTE TRANSMITTER
REDIAL 31 DIGITS MAXIMUM
RINGER OUTPUT >80 dB
FCC RINGER EQUIVALENCE 0.4A
SET IMPEDANCE 600 OHMS NOMINAL
MAXIMUM LOOP 15KFT (4.6 KM)
ELECTRICAL REQUIREMENTS
RINGER SENSITIVITY 40 -100 V, 16 -25 HZ
LINE VOLTAGE 25 -56 VDC
LOOP CURRENT 20 -120 mA
ENVIRONMENTAL
TEMPERATURE -40O TO +60O C(-40O TO 140O F)
HUMIDITY 0-95% RH
DUSTPROOF FULLY GASKETTED ENCLOSURE
MECHANICAL SPECIFICATIONS
HOOK SWITCH (CRADLE SWITCH)LIFE >1 000 000 OPERATIONS
CHASSIS MATERIAL 16 GA STEEL,ZINC DICHROMATE PLATED AND POWDER COATED
FACEPLATE MATERIAL KYDEX 100
DIMENSIONS 7.9 x9.3 x5.3 INCHES (199 x237 x135 MM)
NET WEIGHT 5.5 LBS (2.5 KG)
HANDSET MATERIAL HIGH IMPACT ABS
MICROPHONE NOISE REDUCING ELECTRET
RECEIVER HEARING AID COMPATIBLE
STANDARD MOUNTING DESK OR WALL
CONNECTION FITTINGS CLASS IDIV 21/2” NPT CABLE GLAND
HARDWARE MATERIAL STAINLESS STEEL

Guardian Telecom Inc
Installation and Operation
Model DP700
Page 11
COMPLIANCES
INDUSTRY CANADA 1012 6721 A
FCC HQHCAN-22517-TE-E
CSA LR 158194
CLASS I, DIV.2, GROUPS A,B,C,D
CLASS I, ZONE 2, GROUP IIC
TEMP CODE T5
L.N. 21
RINGER SENSITIVITY: 40 - 100V, 16 - 25Hz.
LINE VOLTAGE: 24 - 56V DC
LOOP CURRENT: 20 - 120mA.
DO NOT DISCONNECT POWER OR REPLACE FUSE
WHILE CIRCUITS ARE LIVE UNLESS AREA IS KNOWN
TO BE NON-HAZARDOUS.
SUBSTITUTION OF COMPONENTS MAY IMPAIR SUITABILITY
OPERATION AND INSTALLATION.
FOR CLASS I., DIV. 2/ZONE 2. REFER TO MANUAL FOR PROPER
WARNING:
LR65547
MADE IN CANADA
HAZARDOUS AREA DESK PHONE
R.E.N. 0.4A
DP700
GUARDIAN TELECOM INC.
TEMPERATURE CODE: T5
CLASS I, ZONE 2, GROUP IIC;
HAZARDOUS LOCATIONS.
DOC AND FCC APPROVED
CLASS I, DIV.2, GROUPS A, B, C AND D;
Figure 5 - ID and Compliance

Guardian Telecom Inc
Installation and Operation
Model DP700
Page 12
Government Certification
Attached to the telephone are labels for Industry Canada and the United States Federal
Communications Commission. These identify equipment certifications indicating the 70 series
telephones meet certain telecommunications network protective, operational and safety
requirements. These agencies do not guarantee the equipment will operate to the user's
satisfaction.
Before installing this telephone equipment, users should ensure it is permissible to connect the
equipment to facilities of the local telecommunications company.
Equipment must be installed using acceptable connection methods. In some cases, the
telephone users inside wiring, associated with a single line service, may be extended by a
certified connector assembly (telephone extension cord). The customer should be aware that in
some situations compliance with the above conditions may not prevent degradation of service.
Repairs to certified equipment should be made by a supplier designated authorized maintenance
facility.
For their own protection users should ensure the electrical ground connections of the power
utility, telephone lines and internal metallic water pipe systems, if present, are connected. This
precaution may be particularly important in rural areas.
CAUTION: Users should not attempt to make ground connections, but should contact the
appropriate electrical inspection authority or electrician.
The Load Number (LN) assigned to each terminal device denotes the percentage of the total load
to be connected to a telephone loop used by the device. Termination on a loop may consist of
any combination of devices subject only to the requirement that the total of the Load Numbers of
all the devices does not exceed 100.
Notification to Telephone Company
Upon request, the customer must notify the telephone company of the particular line to which the
connection will be made and provide the Industry Canada or FCC registration number. The local
telephone company may request disconnection of the telephone where alterations or
malfunctions affect the telephone’s performance.
United States Federal Communications Commission
This equipment generates, uses and can radiate radio frequency energy, and if not installed and
used in accordance with the instruction manual, may cause interference to radio communications.
It has been tested and found to comply with the limits for Class A computing device pursuant to
Subpart J of Part 15 of FCC rules, which are designed to provide reasonable protection against
such interference when operated in a commercial environment. Operation of this equipment in a
residential area is likely to cause interference in which case the user, at his own expense, will be
required to take whatever measures may be required to correct the interference.

Guardian Telecom Inc
Installation and Operation
Model DP700
Page 13
There is no guarantee that interference will not occur in a particular installation. If interference to
radio or television reception from this equipment is suspected, proceed as follows:
1. Unplug the set, check for the interference.
2. Re-orient the receiving antenna.
3. Relocate the set with respect to the receiver.
4. Move the set away from the receiver.
If necessary, consult the supplier or an experienced radio/television technician for additional
suggestions.
This equipment complies with Part 68 of the FCC Rules. On the side of this equipment is a label
that contains, among other information, the FCC registration number and ringer equivalence
number (REN) for this equipment. If requested, this information must be provided to the
telephone company.
The REN is used to determine the quantity of devices which may be connected to the telephone
line. Excessive RENs on the telephone line may result in the devices not ringing in response to
an incoming call. In most, but not all areas, the sum of the RENs should not exceed five. To be
certain of the number of devices that may be connected to the line, as determined by the total
RENs, contact the telephone company to determine the maximum REN for the calling area.
The telephone company may make changes in its facilities, equipment, operations, or procedures
that could affect the operation of the equipment. If this happens, the telephone company will
provide advance notice in order for you to make the necessary modifications in order to maintain
uninterrupted service.
This equipment can not be used on public coin telephone service as provided by your telephone
company. Connection to party line service is subject to state tariffs (contact the state public utility
commission, public service commission or corporate commission for information.)

Guardian Telecom Inc
Installation and Operation
Model DP700
Page 14
Warranty
Guardian Telecom warrants your product to be free of defects in material and workmanship for a period of
one year. Guardian Telecom will repair or replace any defective unit that is under warranty, free of charge.
This warranty is null and void if any non-authorized modifications have been made to this product, or if it
has been subjected to misuse, neglect, or accident. This warranty covers bench repairs only; such repairs
must be made at Guardian Telecom or an authorized service depot. Guardian Telecom is not responsible
for costs incurred for on-site service calls, freight, or brokerage.
A return authorization must be obtained prior to warranty claims or repairs.
Disclaimer
The products covered by this manual are designed for use in Industrial Environments and/or Hazardous
Locations. Due to the range of possible applications for these instruments the manufacturer will not be
responsible for damages or losses of any kind suffered as a result of the use of this product, including
consequential damages. Warning
For the purposes of installing the product and replacing fuses ONLY, this device may be opened and
reassembled by qualified personnel, following the instructions in the product manual. In the cases of
explosion proof and hazardous area devices it is imperative that mating surfaces be clean and undamaged
prior to reassembly and that fasteners be made up to the specified torque.
Service Telephone Number
1-800-363-8010
Guardian Telecom provides a customer service telephone number which is toll-free within North America. If
you need assistance when installing or operating this product, please call the toll-free telephone number
between regular business hours (8:00AM-5:00PM), Mountain Standard Time. If you are calling outside of
regular business hours, please leave a detailed message, and a member of Guardian Telecom’s Service
Department will return your call as soon as possible. If your product requires service, Guardian personnel
will supply you with an RMA (return materials authorization) number over the telephone or through our web
site product return page. This number must be included with your return address and the name of the
person to contact.
Guardian Telecom Inc.
7000 Fisher Rd. SE
Calgary, Alberta, Canada T3H 0W3
Toll-free 1-800-363-8010
Ph. [phone]
Fax. [phone]
www.guardiantelecom.com
E-mail: [email protected]
Feedback
Guardian Telecom continually strives to make reliable, durable, and easy to use products. If you, as an
installer or user of our equipment, have any suggestions for improvements to this or any of our products or
documents, including this manual, we would appreciate hearing from you.

Guardian Telecom Inc
Installation and Operation
Model DP700
Page 15
Guardian Product Return
Guardian products have been quality tested and are in full working order when shipped from the
factory, given the rugged nature of these products, shipping is not expected to damage a unit. In
the unlikely event of a malfunction, Guardian follows the three step procedure below.
Step I - On-Site Correction
The most common source of difficulties with a new product is improper installation in one of two
ways: incorrect wiring connections or connection to an incorrect power source.
Product wiring needs to be properly connected to the on-site wiring. Correct wiring instructions
are shown in the user manual included with the product.
Connecting a telephone to a standard power source, rather than tip & ring, will blow the
telephone’s internal, user-replaceable fuse. In the event of fuse burn-out, disconnect the
telephone from the power source, replace the fuse, and reconnect following the wiring diagrams
provided with the product.
Step II - Return Materials Authorization (RMA)
When a product has been installed following user manual instructions, and the unit fails to
operate, the user must contact Guardian Telecom to obtain authorization to return the product.
After providing information on the product, the owner and the nature of the problem, Guardian will
issue a RMA number, to be shown on documentation returned with the product.
In addition to the RMA number, shipping documents should include name, address and
telephone number of the owner along with contact information for the person responsible for the
repair and/or the user who identified the malfunction.
(Where a product is being returned for repair from outside of Canada, customs documentation
must show the product’s serial number, date of export [date of purchase], and a notation that the
equipment is: “Canadian goods returning.”)
Step III - Factory Authorized Service
Once received, each product is carefully inspected and tested. If the product is under warranty,
repairs are completed and the product returned to the owner, generally within five working days
of receipt by the factory.
A product that has been subjected to misuse, neglect or accident or is beyond the warranty
period will be evaluated. The service department will provide the owner’s representative with a
repair cost estimate. Once approved, repairs are completed and the product returned, generally
within five working days.

Guardian Telecom Inc.
7000 Fisher Rd. SE
Calgary, Alberta, Canada T2H 0W3
Toll-free 1-800-363-8010
Ph. [phone]
Fax. [phone]
www.guardiantelecom.com
E-mail: [email protected]
Industrial Communications Worldwide
© Guardian Telecom Inc. 2002