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