Guardian Telecom DTR-VoIP Series Owner's manual

Ph: 403.258.3100 \ email:[e-mail] \ www.guardiantelecom.com
Industrial Desk/Wall Mount VoIP Telephones
DTR-VoIP and DTT-VoIP Series
Installation and Operation
DTT-50-VoIP DTR-51-VoIP
P007314 Rev. E 180917 9/21/2018 11:01 AM

Guardian Telecom Installation and Operation
DTR/DTT-VoIP Series Telephones
Page 2
PoE DTR/T-VoIP Installation Guide P007314 Rev. E
COPYRIGHT NOTICE:
© 2018, Guardian Telecom, ALL RIGHTS RESERVED.
This manual and the related materials are the copyrighted property of Guardian Telecom
No part of this manual or related materials may be reproduced or transmitted, in any form
or by any means (except for internal use by licensed customers), without prior express
written permission of Guardian Telecom This manual, and the products, software,
firmware, and/or hardware described in this manual are the property of Guardian Telecom
provided under the terms of an agreement between Guardian Telecom and the recipient
of this manual, and their use is subject to that agreement and its terms.
DISCLAIMER: Except as expressly and specifically stated in a written agreement
executed by Guardian Telecom, Guardian Telecom makes no representation or warranty,
express or implied, including any warranty or merchantability or fitness for any purpose,
with respect to this manual or the products, software, firmware, and/or hardware described
herein, and Guardian Telecom assumes no liability for damages or claims resulting from
any use of this manual or such products, software, firmware, and/or hardware. Guardian
Telecom reserves the right to make changes, without notice, to this manual and to any
such product, software, firmware, and/or hardware.
OPEN SOURCE STATEMENT: Certain software components included in Guardian
products are subject to the GNU General Public License (GPL) and Lesser GNU General
Public License (LGPL) “open source” or “free software” licenses. Some of this Open
Source Software may be owned by third parties. Open Source Software is not subject to
the terms and conditions of the Guardian COPYRIGHT NOTICE or software licenses.
Your right to copy, modify, and distribute any Open Source Software is determined by the
terms of the GPL, LGPL, or third party, according to who licenses that software.
Software or firmware provided by Guardian that is unrelated to Open Source Software is
copyrighted by Guardian, subject to the terms of Guardian licenses, and may not be
copied, modified, reverse-engineered, or otherwise altered without explicit written
permission from Guardian Telecom
TRADEMARK NOTICE: Guardian Telecom and the Guardian Telecom logos are
trademarks of Guardian Telecom Other product names, trademarks, and service marks
may be the trademarks or registered trademarks of their respective owners.
Toll-free 1-800-363-8010
Phone [phone]
Fax. [phone]
www.guardiantelecom.com
E-mail: [email protected]

Guardian Telecom Installation and Operation
DTR/DTT-VoIP Series Telephones
Page 3
Important Safety Instructions
1. Read these instructions.
2. Keep these instructions.
3. Heed all warnings.
4. Follow all instructions.
5. Install in accordance with the manufacturer’s instructions.
6. Do not install near any heat sources such as radiators, heat registers, stoves, or other
apparatus (including amplifiers) that produce heat.
7. Only use attachments/accessories specified by the manufacturer.
8. Refer all servicing to qualified service personnel.
9. Prior to installation, consult local building and electrical code requirements.
This product meets the applicable Industry Canada technical specifications. / Le présent matériel est
conforme aux specifications techniques applicables d’Industrie Canada.
If trouble is experienced with this equipment (DTR-VoIP and DTT-VoIP), for repair or warranty information, please contact
Guardian Telecom at 1-800-363-8010. If the equipment is causing harm to the telephone network, the telephone company
may request that you disconnect the equipment until the problem is resolved.
If this equipment requires AC power, it is suggested that a surge arrestor be used.

Guardian Telecom Installation and Operation
DTR/DTT-VoIP Series Telephones
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Table of Contents
1. Product Overview.......................................................................................................6
2. Typical System Installation.........................................................................................6
3. Features.....................................................................................................................7
4. Installation..................................................................................................................9
5. Wiring.......................................................................................................................11
6. Operation..................................................................................................................11
7. Supported Protocols.................................................................................................12
8. Supported SIP Servers.............................................................................................12
9. DTR/DTT-VoIP Telephones Wiring..........................................................................12
9.1. Connections..................................................................................................12
9.2. Connecting a Device to the Auxiliary Relay..................................................13
9.3. Identifying the Connector Locations and Functions ......................................14
9.4. Network Connectivity, and Data Rate...........................................................15
9.4.1. Verify Network Activity..........................................................................15
9.5. RESET Switch ..............................................................................................16
9.5.1. Announcing the IP Address..................................................................16
9.5.2. Restore the Factory Default Settings....................................................16
9.6. Adjust the Volume.........................................................................................16
10. Specifications...........................................................................................................17
11. Field Repairs............................................................................................................18
12. Replacement Parts...................................................................................................19
13. Warranty...................................................................................................................20
14. Disclaimer.................................................................................................................20
15. Warning....................................................................................................................20
16. Service Telephone Number......................................................................................20
17. Feedback..................................................................................................................20
18. Guardian Product Return..........................................................................................21
19. Cleaning Tips for Guardian Telephones...................................................................22
20. Storage.....................................................................................................................22
Figures
Figure 1 - Typical Installation..............................................................................................6
Figure 2 - Features (typical)................................................................................................8
Figure 3 - Overall Dimensions.............................................................................................8
Figure 4 - Wall Installation of Base .....................................................................................9
Figure 5 – Wiring...............................................................................................................10
Figure 6 - Temporary Mounting for Wiring ........................................................................11
Figure 7 - Terminal Block Connections.............................................................................12
Figure 8 - Connector Locations.........................................................................................14
Figure 9 - Network Activity................................................................................................15
Figure 10 - RESET Switch................................................................................................16
Tables
Table 1 - Connector Functions..........................................................................................14

Guardian Telecom Installation and Operation
DTR/DTT-VoIP Series Telephones
Page 5
Package Contents
(1) DTR-VoIP or DTT-VoIP Telephone
(1) Parts bag containing 1 Allen wrench and handset retainer
(1) Mounting Template
Note: Installation and Operation Manual, Setup and Configuration Manual, Guardian
Discovery Utility, Interoperability Guide, VoIP Technical Support, Firmware and
Autoprovisioning template are all available at www.guardiantelecom.com.
Models
P3040 DTT-50-VoIP telephone with coil cord.
P3041DTT-60-VoIP telephone with armored handset cord.
P3042DTR-51-VoIP Ringdown telephone with coil cord.
P3043DTR-61-VoIP Ringdown telephone with armored handset cord.
Accessories
POE – Injector – Auxiliary Power Supply (Contact Sales)
Loud Ringers and Strobe Lights
Updating Your VoIP Product
Please review www.guardiantelecom.com support pages to obtain the latest F/W or contact
Guardian Telecom Support at mailto:[email protected]

Guardian Telecom Installation and Operation
DTR/DTT-VoIP Series Telephones
Page 6
1. Product Overview
DTT-VoIP Series Weather Resistant Telephones
DTR-VoIP and DTT-VoIP telephones provide safe, reliable communications in areas that are prone to high humidity, chemical
vapors, dust and physical abuse.
These telephones are compatible with most SIP-based IP PBX servers that comply with SIP RFC 3261. Users can remotely
monitor and program settings through a web browser to configure telephones on their network.
The DTR-51-VoIP and DTT-50-VoIP are standard models with a coiled handset cord and the DTR- 61-VoIP and DTT-60-VoIP
are vandal resistant models with an armored handset cord.
2. Typical System Installation
The Voice-over-IP (VoIP) DTR-VoIP and DTT-VoIP Telephones are Power-over-Ethernet (PoE 802.3af) and Voice-over-IP
(VoIP) two-way communications devices that easily connect into existing local area networks (LANs) with a single cable
connection.
Figure 1 illustrates how the DTT-VoIP Telephones can be installed as part of a VoIP phone system.
Figure 1 - Typical Installation

Guardian Telecom Installation and Operation
DTR/DTT-VoIP Series Telephones
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3. Features
•Enclosure
-glass filled Polyester body construction
-weatherproof and corrosion resistant
-reversible base for desk or wall mount
-corrosion resistant hardware
•Temperature range -22
˚ to +140 ˚ F
( -30
˚ to +60 ˚ C)
•Optional conformal coated circuit boards are
resistant to corrosive agents (e.g. H2S, SO2and
NH3) and environments with high humidity
•Waterproof connections & stainless steel
fittings for longer life
•Magnetic Reed Hook Switch - no moving parts
•Easily mounted on any sturdy vertical structure
•Noise Reducing Microphone allows a high level
of intelligibility in locations with high background
noise
•Armored Handset Cord (DTR-61 VoIP and
DTT-60-VoIP only) withstands severe use
•Heavy duty K Type industrial handset
•Handset retainers to maintain on-hook status
•Modular parts for easy service
•Two M20 and one M12 cable entries
•Hearing-Aid Compatible & Receiver Volume
Adjustment
•Compatible with inductively coupled hearing-aid
devices
•Adaptive full duplex operation
•Compatible with most SIP-based IP PBX
servers that comply with SIP (RFC 3261).
•Network web management interface
•Guardian discovery utility makes it easy to
detect, locate and launch the web based
configuration screens
•Product self-diagnostic testing available
through web interface
•Network adjustable speaker volume and
microphone sensitivity sets default levels.
User adjustable volume control on Handset.
•PoE 802.3af enabled (Powered-over-
Ethernet) or alternate power source
•Web Based User Interface allows remote
setup of network, product operations,
updates, self-diagnostics and other functional
access.
•Auxiliary Relay – Multiple activation
selectable through web interface.
•Dual speeds of 10 Mbps and 100 Mbps
•Network/Web management
•Dial Out Extension supports the addition of
comma delimited pauses before sending
additional DTMF tones
•Network downloadable product firmware
•Tamper proof design
•Autoprovisioning and Device Configuration
Export/Import saves setup time on multiple
deployments.
•Configurable audio files
•Event Monitoring / Triggers – (Refer to VoIP
Configuration Guide – P/N: P007402)
•Three year warranty
•Peer-to-peer capable
•Optional security screws with driver bit

Guardian Telecom Installation and Operation
DTR/DTT-VoIP Series Telephones
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Figure 2 - Features (typical)
Figure 3 - Overall Dimensions

Guardian Telecom Installation and Operation
DTR/DTT-VoIP Series Telephones
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Figure 4 - Wall Installation of Base
4. Installation
Enclosure
Follow all appropriate electrical codes and use only approved electrical fittings for the
installation.
To Avoid The Danger Of An Accidental Shock or Circuit Damage
o
If using an auxiliary power supply ensure it is unplugged during installation.
o
If using the onboard relay to control an external relay ensure power is off during installation.
The telephone may be installed on a flat surface or wall mounted.
Using the 3mm Allen Key provided, loosen the four faceplate captive screws to detach the
faceplate from the base.
Desk Top Configuration
If the telephone is to be desk top mounted set the base in the desired location.
Wall Mount Configuration
If the telephone is to be wall mounted choose a location that is free of obstructions and permits
space for wiring. Mount the base with the deepest dimension on the bottom. Mount as
follows:
See: Figure 3 - Overall
Dimensions
o
The telephone weighs 3.95 kilograms (8.68 pounds), ensure that the mounting can
support four times the weight of the unit; that is 15.8 kilograms (34.8 pounds).
Wall anchors are not included; follow the manufacturer's instructions when
installing anchors.
o
Mounting to concrete or cinder block. Lead expansion anchors with M4 (#8)
screws are recommended.
oMounting to drywall. Hollow wall anchors (Molly Bolts) with M4 (#8) screws are
recommended.
o
Mounting to other surfaces. It is the responsibility of the installer to ensure that the
base is attached in such a way as to support the weight specified above.
Install the handset retainer clips on the faceplate using the hardware supplied.

Guardian Telecom Installation and Operation
DTR/DTT-VoIP Series Telephones
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J1: STANDARD 8 PIN RJ45 10/100Base-T and power input via Power over Ethernet
Figure 5 – Wiring
Alternate Power – Pin 3 is positive and pin 4 is negative input.

Guardian Telecom Installation and Operation
DTR/DTT-VoIP Series Telephones
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5. Wiring
WARNING: Use properly sized cable to ensure a gas/dust tight seal at the cable gland to
maintain an IP66 rating, (M12 – 2 to 5mm), (M20 – 8 to 13mm). Take care not to lose parts
of the gland if the cap is removed.
Tip: If cable diameter is not in
the range of the M12 or M20
glands provided an approved
reducer and smaller gland can
be fitted.
See: Figure 6 - Temporary
Mounting for Wiring
See: Figure 5 - Wiring
If the telephone is wall mounted temporarily hang the faceplate on the right side of the base
using two of the faceplate screws. Be careful not to lose the "O" ring screw retainers.
Determine if power to operate the telephone will be provided via the ethernet or if external
power will be required. If external power is required install Guardian’s Auxiliary Power Supply or
equivalent.
Thread the bare end of the Network cable out of the enclosure through the gland and insert the
plug into the RJ-45 connector on the PCBA.
Connect the on board relay if utilized.
See: Section 9.2 Connecting
a Device to the Auxiliary
Relay and
Figure 7 - Terminal Block
Connections
If using an alternate power supply connect to the terminal block.
Tighten the cable glands securely.
Connect the Network cable into the system.
Determine that the telephone is properly connected by pressing the RESET switch for less than
five seconds to announce the IP address.
Mount the face plate and secure the captive screws to the base.
Tip: Torque screws to 1.65
ft/lbs (1.36Nm)
Apply power to the telephone. Allow approx. 30 seconds for the phone to boot up.
If using an auxiliary power supply apply power to the conductors.
If the built in Ring Detect Relay is utilized apply power to the conductors.
Programming
Set up and configure if changes are required to the default settings.
Tip: See Manual P007402 -
Setup and Configuration
Test the unit by making calls to and from another unit.
Figure 6 - Temporary Mounting for Wiring
6. Operation
Once your Model DTT-VoIP Telephone has been properly installed and energized, operation is identical to most other single
line telephones.
DTR-VoIP telephones will dial the programmed number when the handset is lifted.
Adjust the receiver volume with the switch in the handset or on the keypad.

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DTR/DTT-VoIP Series Telephones
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7. Supported Protocols
The DTT-VoIP Telephone with Keypad supports:
●SIP (Session Initiation Protocol)
●HTTP Web-based configuration
Provides an intuitive user interface for easy system configuration and verification of DTT-VoIP Telephone with
Keypad operations.
●DHCP Client
Dynamically assigns IP addresses in addition to the option to use static addressing.
●TFTP Client
Facilitates hosting for the Autoprovisioning configuration file.
●RTP
Facilitates autoprovisioning configuration values on boot.
●Audio Encodings
PCMU (G.711 mu-law)
PCMA (G.711 A-law)
G722.1 (Siren7)
G722.2 (AMR-WB)
G729.1 (G729J & G729EV)
8. Supported SIP Servers
As a SIP device, this product will operate with most IP PBX servers.
9. DTR/DTT-VoIP Telephones Wiring
9.1. Connections
Figure 7 shows the pin connections on the J9 (terminal block). This terminal block can accept a wire range from 16
AWG to 26 AWG.
Note: As an alternative to using PoE power 12 to 24 VDC at 500 mA can be supplied to the terminal block.
Figure 7 - Terminal Block Connections

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DTR/DTT-VoIP Series Telephones
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9.2. Connecting a Device to the Auxiliary Relay
The ACR/ACT-VoIP Telephone incorporates one on-board relay located on the PCBA, which
enables users to control a low current external relay or device. An external relay could control a
ringer, strobe light, door lock or any other apparatus. The on board relay is protected by a 1
Amp, non-replaceable fuse. Power switched by the relay should not exceed 0.5
Amps @ 30VDC. The PCBA is not designed to handle AC voltages.
Warning: The relay circuitry contains a non-replaceable 250VAC 1A fuse. If the
fuse blows the board must be returned to Guardian or an approved service
center for repair.
The Telephone relay activation time is selectable through the web interface on the Device
Configuration Page. The relay is controlled by DTMF tones generated from the phone to which
the VoIP phone is connected; no matter which one initiated the call. The DTMF tones are
selectable from the web interface as well.
See:Manual P007402
Setup and Configuration
Note: The three digit code for the auxiliary relay must be sent in conformance with RFC2833
DTMF generation.

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DTR/DTT-VoIP Series Telephones
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9.3. Identifying the Connector Locations and Functions
See Figure 8 and Table 1 to identify the connector locations and functions.
Figure 8 - Connector Locations
Connector Function
J1 PoE Network Connection (RJ-45)
J2 Hands free Microphone Interface/LED Interface
J3 Not used
J4 JTAG Interface
J5 Handset/Reed Switch Interface
J6 Speaker Interface
J7 Keypad Interface
J8 RS232 Port
J9 Terminal Block (see Figure 5)
J10 LCD Interface
J11 Handset V.C. Interface
J12 ISP-DIP/Debug UART
Table 1 - Connector Functions

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DTR/DTT-VoIP Series Telephones
Page 15
9.4. Network Connectivity, and Data Rate
When you plug in the Ethernet cable or power supply:
• The square, green Link light above the Ethernet port indicates that the network connection has been
established (see Figure 9). The Link light changes color to confirm the auto-negotiated baud rate:
• This light is yellow at 9 Mbps.
• It is orange at 100 Mbps.
9.4.1. Verify Network Activity
The square, yellow Activity light blinks when there is network activity.
Figure 9 - Network Activity

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DTR/DTT-VoIP Series Telephones
Page 16
9.5. RESET Switch
When the Telephone is operational and linked to the network use the Reset Test Function Management
(RESET) switch (Figure 10), on the Telephone board to announce, the Telephone’s IP Address, and test
that the audio is working (see Section 9.5.1). The message will come through the handset receiver.
Figure 10 - RESET Switch
9.5.1. Announcing the IP Address
To announce a telephone’s current IP address:
1. Press and release the RESET switch (SW1). Do not hold more than five seconds.
Note The telephone will use DHCP to obtain the new IP address (DHCP-assigned address or
default to 10.10.10.10 if a DHCP server is not present).
Note Pressing and holding the RESET switch for longer than five seconds will restore the
telephone to the factory default settings.
9.5.2. Restore the Factory Default Settings
When troubleshooting configuration problems, it is sometimes convenient to restore the device to a
known state.
Note:Each Telephone is delivered with factory set default values.
To set the factory default settings:
1. Press and hold the RESET switch (SW1) for more than five seconds.
2. The telephone announces that it is restoring the factory default settings.
Note The telephone will use DHCP to obtain the new IP address (DHCP-assigned address or
default to 10.10.10.10 if a DHCP server is not present).
9.6. Adjust the Volume
You can adjust the volume through the Device Configuration Page.

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DTR/DTT-VoIP Series Telephones
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10. Specifications
Electrical Performance
RINGER OUTPUT >80 dB
MICROPHONE NOISE REDUCING
RECEIVER HEARING AID COMPATIBLE
Category
ETHERNET I/F 10/100 MBPS
PROTOCOL SIP RFC 3261 COMPATIBLE
P
OWER
I
NPUT
:
METHOD #1
METHOD #2
802.3AFCOMPLIANT POESWITCH OR POWER INJECTOR
24VDC@1APOWER ADAPTER
CODECS SUPPORTED
G711,
A-
LAW AND µ
-
LAW
G722.1 (SIREN7)
G722.2 (AMR-WB)
G729.1 (G729J AND G729EV)
RELAY CONTACT FUSE PROTECTED TO 1A
Environmental
INGRESS PROTECTION RATING IP66
OPERATING TEMPERATURE
-22
OTO
+140
O
F
(-30
OTO
+60
O
C)
STORAGE TEMPERATURE
-58
OTO
+176
O
F
(-50
OTO
+80
O
C)
HUMIDITY 0 TO 95%RH
DUSTPROOF FULLY GASKETTED ENCLOSURE
Mechanical
HOOK SWITCH (CRADLE SWITCH)LIFE >1 000 000 OPERATIONS
HOUSING MATERIAL GLASS FILLED POLYESTER (CARBON LOADED)
HANDSET MATERIAL GLASS FILLED POLYESTER (CARBON LOADED)
DIMENSIONS (H XWX D) WALL MOUNTED 11.1 X9.7X6.2” (282X246 X158MM)
NET WEIGHT 8.7 LBS (3.95KG).
SHIPPING DIMENSIONS 16.0 X10.5 X9.5”(407 X267 X242 MM)
SHIPPING WEIGHT 10.5 LBS (4..8 KG).
STANDARD MOUNTING DESK OR WALL
WIRING ACCESS
½”NPT
HARDWARE MATERIAL STAINLESS STEEL
COMPLIANCE
FCC PART 15, CLASS A
ICES-003 CLASS A
IEC
61000-6-2:
2005
60950-1
CISPR 22: 2008
WEATHERPROOF ENCLOSURE 4X/IP66
This device complies with part 15 of the FCC Rules. Operation is subject to the following two conditions: (1) This device may
not cause harmful interference, and (2) this device must accept any interference received, including interference that may
cause undesired operation.

Guardian Telecom Installation and Operation
DTR/DTT-VoIP Series Telephones
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11. Field Repairs
Field repairs may only be carried out by qualified technicians using OEM parts. Substitution of
parts voids warranty and may pose a hazard to users of the equipment.
See: 12 Replacement Parts
Disconnect the telephone IP Cable and Aux Power if necessary.
Carefully remove the front cover assembly and separate from the housing by disconnecting the
wiring. NOTE that the handset and all electronics are attached to the front plate.
Perform the necessary repairs or adjustments.
Carefully replace the front plate and install all four screws. Do not over tighten the cover screws.
There is a flexible gasket between the cover and the body; excessive tightening of the screws
deforms the gasket and reduces the weather resistance of the set.
Tip: Torque screws to 2.5
in/lbs (0.28 Nm).
Handset Replacement
Refer to the instruction sheet included with the replacement handset.
Disconnect the handset wiring from the terminal block.
If the phone is equipped with an armored cord handset, remove the anchor screw from the
armored cord lanyard.
Loosen the handset cable gland and pull out the cord.
Install the new replacement handset and tighten the gland.
Rewire the handset cord to the terminal block.
Ringer Speaker Replacement
Unplug the speaker connector from the main board.
Remove the screws that hold the speaker cap to get access to the speaker.
Install the new speaker and gasket.
Reconnect the speaker connector to the main board.
Main Circuit Board Replacement
Label any wiring attached to the circuit board. Disconnect wiring and ribbon cable.
Remove the screws holding the circuit board in place and carefully remove the board.
Install the new board and reconnect wiring.

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DTR/DTT-VoIP Series Telephones
Page 19
12. Replacement Parts
Part No.
Description
P001039
Magnetic reed hook switch
P001462
0-Ring gaskets for faceplate screws (4 required)
P004123
Nylon fastener for hook switch
P3044
Replacement Handset c/w coil cord.
P006614
Handset retainer
P006617
Allen key for faceplate screws
P006656
Receiver cartridge & PCBA Assembly
P006668
M20 Plug
P006675
Faceplate gasket
P006679
M12 Gland
P006690
M20 Gland
P006692
M4 Faceplate screws (4 required)
P006819
Speaker
P006862
M12 Plug
P3045
Replacement Handset c/w armored cord.
P007013
Microphone cartridge PCBA assembly
P007177
Telephone housing base
P007395
PCBA, VoIP Telephone
P008107
Telephone faceplate

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DTR/DTT-VoIP Series Telephones
Page 20
13. Warranty
Guardian Telecom warrants your product to be free of defects in material and workmanship for a
period of three years. Guardian Telecom will repair or replace any defective unit that is under
warranty.
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.
14. 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.
15. Warning
This device may be opened and reassembled by qualified personnel only, for the purposes of
installing the product, making adjustments and replacing components, following the instructions in
the product manual.
High voltages may be present in this product when connected to telephone wiring.
16. 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, a division of Circa Enterprises Inc.
Toll-free 1-800-363-8010
Phone [phone]
Fax. [phone]
www.guardiantelecom.com
17. 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.