GAI-Tronics ITR2000A User Manual
Pub. 43004-006D
GAI-TRONICS® CORPORATION
A HUBBELL COMPANY
ITR2000A Tone Remote Desk Set
User and Installation Manual
GAI-Tronics Corporation 400 E. Wyomissing Ave. Mohnton, PA 19540 USA
610-777-1374 800-492-1212 Fax: 610-796-5954
ISIT WWW.GAI-TRONICS.COM FOR PRODUCT LITERATURE AND MANUALS
V
CONFIDENTIALITY NOTICE
This manual is provided solely as an operational, installation, and maintenance guide and contains
sensitive business and technical information that is confidential and proprietary to GAI-Tronics.
GAI-Tronics retains all intellectual property and other rights in or to the information contained herein,
and such information may only be used in connection with the operation of your GAI-Tronics product or
system. This manual may not be disclosed in any form, in whole or in part, directly or indirectly, to any
third party.
COMPUTER SOFTWARE COPYRIGHTS
This product contains copyrighted computer programs stored in semiconductor memory. These programs
are copyrighted by GAI-Tronics Corporation and may not be reproduced in any form without express
written permission from GAI-Tronics.
WARRANTY
GAI-Tronics warrants for a period of one (1) year from the date of shipment, that any GAI-Tronics equipment supplied hereunder
shall be free of defects in material and workmanship, shall comply with the then-current product specifications and product
literature, and if applicable, shall be fit for the purpose specified in the agreed-upon quotation or proposal document. If (a)
Seller’s goods prove to be defective in workmanship and/or material under normal and proper usage, or unfit for the purpose
specified and agreed upon, and (b) Buyer’s claim is made within the warranty period set forth above, Buyer may return such
goods to GAI-Tronics’ nearest depot repair facility, freight prepaid, at which time they will be repaired or replaced, at Seller’s
option, without charge to Buyer. Repair or replacement shall be Buyer’s sole and exclusive remedy, and the warranty period on
any repaired or replacement equipment shall be one (1) year from the date the original equipment was shipped. In no event shall
GAI-Tronics’ warranty obligations with respect to equipment exceed 100% of the total cost of the equipment supplied hereunder.
The applicability of any such third-party warranty will be determined solely by GAI-Tronics.
Services. Any services GAI-Tronics provides hereunder, whether directly or through subcontractors, shall be performed in
accordance with the standard of care with which such services are normally provided in the industry. If the services fail to meet
the applicable industry standard, GAI-Tronics will, for a period of one (1) year from the date of completion, re-perform such
services at no cost to the Buyer. Re-performance of services shall be Buyer’s sole and exclusive remedy, and in no event shall
GAI-Tronics’ warranty obligations with respect to services exceed 100% of the total cost of services provided hereunder.
Limitations/Exclusions. The warranty on any equipment supplied hereunder is subject to Customer’s use in compliance
with applicable FCC regulations and manufacturer specifications. The warranties herein shall not apply to, and GAI-Tronics
shall not be responsible for, any damage to the goods or failure of the services supplied hereunder, to the extent caused by
accident, misuse, abuse, neglect, system design, product modification, failure to follow instructions contained in the product
manual, repair, or attempted repair by anyone not authorized by GAI-Tronics, improper installation, installation of parts that do
not conform to the quality or specifications of the original parts or accessories, damage or loss occurred during shipment, or any
unit which is not new when sold or upon which the serial number has been defaced, modified or removed. The warranty does not
extend to damage incurred by natural causes including Force Majeure. The warranty does not cover microprocessors if failure is
due to static damage or application of improper voltage.
THE WARRANTIES AND REMEDIES CONTAINED
HEREIN ARE IN LIEU OF AND EXCLUDE ALL OTHER WARRANTIES AND REMEDIES, WHETHER
EXPRESS OR IMPLIED BY OPERATION OF LAW OR OTHERWISE, INCLUDING ANY WARRANTIES OF
MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE.
Operational and Maintenance Procedures. Buyer acknowledges that any improper use, maintenance, or
modification of the equipment provided hereunder, or use of unqualified maintenance or service technicians will severely impair
the operational effectiveness of the entire communication system. Buyer hereby agrees to indemnify, defend and hold GAITronics harmless from and against any and all third party claims arising, in any manner, out of: (a) Buyer’s neglect of the
equipment; (b) Buyer’s use of technicians not authorized by GAI-Tronics to service the equipment; or (c) Buyer’s improper use
or modification of the equipment or failure to follow the operational and maintenance procedures provided with the equipment.
Limitation of Liability/Damages. In no event (even should circumstances cause the exclusive warranties and remedies
set forth in the Warranty section to fail of their essential purpose) shall either party be liable for any indirect, incidental, special
or consequential damages (including, but not limited to, loss of use, loss of anticipated profits, or damages arising from delay)
whether such claims are alleged to have arisen out of breach of warranty, breach of contract, strict or absolute liability in tort, or
other act, error or omission, or from any other cause whatsoever, or any combination of the foregoing.
02/12 Pub. 43004-006D i
Table of Contents
FOREWORD ............................................................................................................................................................... 1
SCOPE OF MANUAL .................................................................................................................................................... 1
NOMENCLATURE ........................................................................................................................................................ 1
ORDERING REPLACEMENT PARTS .............................................................................................................................. 1
SERVICE AND REPAIR ................................................................................................................................................. 1
FCC INTERFERENCE WARNING .................................................................................................................................. 1
SAFE HANDLING OF CMOS INTEGRATED CIRCUIT DEVICES ...................................................................................... 2
DESCRIPTION............................................................................................................................................................ 3
FEATURES AND BENEFITS OF THE ITR2000A TONE REMOTE DESK SET .................................................................... 3
INTRODUCTION TO THE ITR2000A DESK SET ............................................................................................................ 4
DESK SET BUTTON PANEL ......................................................................................................................................... 4
INTERNAL MICROPHONE AND SPEAKER ..................................................................................................................... 5
HANDSET ................................................................................................................................................................... 5
CONNECTORS ............................................................................................................................................................. 5
Power Connector .................................................................................................................................................. 5
Audio Accessory/RS-232 Port (P411) ................................................................................................................... 6
Line Connector (P401) ......................................................................................................................................... 6
CONTROL TONES ........................................................................................................................................................ 7
TONE LEVELS ............................................................................................................................................................. 7
ACCESSORIES ............................................................................................................................................................. 7
FIELD REPLACEMENT ITEMS ...................................................................................................................................... 8
PERFORMANCE SPECIFICATIONS ................................................................................................................................. 8
OPERATION ............................................................................................................................................................... 9
INTRODUCTION ........................................................................................................................................................... 9
FRONT PANEL BUTTONS ............................................................................................................................................. 9
TRANSMIT Button and LED ................................................................................................................................. 9
MONITOR Button and LED .................................................................................................................................. 9
IC (Intercom) Button ........................................................................................................................................... 10
CTL (Control) Button .......................................................................................................................................... 10
VOLUME Up/Down Buttons ............................................................................................................................... 10
F1, F2, F3, and F4 Programmable Buttons .................................................................................................... 11
RECEIVING CALLS .................................................................................................................................................... 11
INITIATING CALLS .................................................................................................................................................... 12
Handset Transmit ................................................................................................................................................ 12
Transmit From Internal Microphone .................................................................................................................. 12
Transmit From Desk Microphone or Footswitch ................................................................................................ 12
SCANNING OPERATION ............................................................................................................................................. 13
Operation ............................................................................................................................................................ 13
02/12 Pub. 43004-006D ii
Table of Contents ITR2000A Tone Remote Desk Set
PARALLEL STATUS OPERATION ................................................................................................................................ 14
INSTALLATION ....................................................................................................................................................... 15
PLANNING THE INSTALLATION .................................................................................................................................. 15
MECHANICAL RECEIPT INSPECTION ......................................................................................................................... 15
MOUNTING ............................................................................................................................................................... 15
FCC INTERFERENCE WARNINGS .............................................................................................................................. 15
ELECTROSTATIC DISCHARGE (ESD) PROTECTION .................................................................................................... 16
EQUIPMENT REQUIRED ............................................................................................................................................. 16
CABLE INSTALLATION SAFETY CONSIDERATIONS..................................................................................................... 16
TELEPHONE LINE LIGHTNING AND OVER-VOLTAGE PROTECTION ............................................................................ 16
POWER CONNECTION ............................................................................................................................................... 16
LINE CONNECTION ................................................................................................................................................... 17
Line Considerations - Private Circuit ................................................................................................................. 17
Circuit Conditioning ........................................................................................................................................... 17
AUDIO ACCESSORY/RS-232 PORT CONNECTION ...................................................................................................... 17
MICROPHONE SENSITIVITY ....................................................................................................................................... 18
LEVEL ADJUSTMENTS AND DIAGNOSTICS ................................................................................................................. 19
Main Programming Selection Mode ................................................................................................................... 19
F1 – Line Output Adjust (Transmit) .................................................................................................................... 20
F2 – Line-in Sensitivity (Receive) ....................................................................................................................... 21
F3 – Internal Diagnostics ................................................................................................................................... 22
CARD SUITE PROGRAMMING SOFTWARE .................................................................................................... 23
GENERAL DESCRIPTION ............................................................................................................................................ 23
CONNECTION ............................................................................................................................................................ 23
INSTALLATION .......................................................................................................................................................... 23
TROUBLESHOOTING ............................................................................................................................................ 25
TROUBLESHOOTING THE ITR2000A DESK SET ........................................................................................................ 25
FUSE REPLACEMENT ................................................................................................................................................ 26
CIRCUIT BOARDS .................................................................................................................................................. 27
SCHEMATICS .......................................................................................................................................................... 31
DEFINITIONS AND ACRONYMS ......................................................................................................................... 39
02/12 Pub. 43004-006D iii
Foreword
Scope of Manual
This manual offers descriptive data and service information for the ITR2000A Tone Remote Desk Set.
Service diagrams and printed circuit board details are a part of this service manual.
Nomenclature
The model number, located on the nameplate on the bottom, specifically identifies GAI-Tronics
equipment. If additional options are ordered, the option will be identified on the circuit board.
Ordering Replacement Parts
When ordering replacement parts or requesting equipment information, please include the complete
identification number. This applies to all components, kits, and chassis. If the component part number is
not known, the order should include the number of the chassis or kit of which it is a part and sufficient
description of the desired component to identify it. Order parts from:
Customer Service
GAI-Tronics Corporation
400 E. Wyomissing Ave.
Mohnton, PA 19540
US: 800-492-1212
Outside US: 610-777-1374
Service and Repair
Inoperative or malfunctioning equipment should be returned to the factory for repair. Please call
1-800-492-1212 to obtain a Return Authorization number, published repair prices, and shipping
instructions.
OTE: A purchase order or credit card number is required prior to processing non-warranty repairs.
N
FCC Interference Warning
The FCC requires that manuals pertaining to Class A and Class B computing devices must contain
warnings about possible interference with local residential radio and TV reception. This warning reads
as follows:
N
OTE: This equipment has been tested and found to comply with the limits for a Class A digital device,
pursuant to Part 15 of the FCC Rules. These limits are designed to provide reasonable protection against
harmful interference when the equipment is operated in a commercial environment. This equipment
generates, uses, and can radiate radio frequency energy and, if not installed and used in accordance with
the instruction manual, may cause harmful interference to radio communications. Operation of this
equipment in a residential area is likely to cause harmful interference in which case the user will be
required to correct the interference at his own expense.
1 02/12
Foreword ITR2000A Tone Remote Desk Set
Safe Handling of CMOS Integrated Circuit Devices
Many of the integrated circuit devices used in communications equipment are of the Complementary
Metal Oxide Semiconductor (CMOS) type. Because of their high open circuit impedance, CMOS
integrated circuits are vulnerable to damage from static charges. Care must be taken handling, shipping,
and servicing them and the assemblies in which they are used.
Even though protection devices are provided in CMOS integrated circuit inputs, the protection is
effective only against overvoltage in the hundreds of volts range such as is encountered in an operating
system. In a system, circuit elements distribute static charges and load the CMOS circuits, decreasing the
chance of damage. However, CMOS circuits can be damaged by improper handling of the modules, even
in a system.
To avoid damage to circuits, observe the following handling, shipping, and servicing precautions:
1. Prior to and while servicing a circuit module, particularly after moving within the service area,
momentarily touch both hands to a bare metal, earth-grounded surface. This will discharge any static
charge that may have accumulated on the person doing the servicing.
N
OTE: Wearing a conductive wrist strap will minimize static build-up during servicing.
2. Whenever possible, avoid touching any electrically conductive parts of the circuit module with your
hands.
3. Power down the unit before installing or removing the circuit module.
4. When servicing a circuit module, avoid carpeted areas, dry environments, and certain types of
clothing (silk, nylon, etc.) because they contribute to static build-up. Similarly, disconnect the test
probe prior to removing the ground lead.
5. All electrically powered test equipment should be grounded. Apply the ground lead from the test
equipment to the circuit module before connecting the test probe.
6. If a circuit module is removed from the system, it is desirable to lay it on a conductive surface (such
as a sheet of aluminum foil) which is connected to ground through 100k of resistance.
7. When soldering, be sure the soldering iron is grounded and has a grounded tip.
8. Prior to connecting jumpers, replacing circuit components, or touching CMOS pins (if this becomes
necessary in the replacement of an integrated circuit device), be sure to discharge any static build-up
as described in procedure 1. Since voltage differences can exist across the human body, it is
recommended that only one hand be used if it is necessary to touch pins on the CMOS device and
associated board wiring.
9. When replacing a CMOS integrated circuit device, leave the device in its conductive rail container or
conductive foam until it is to be inserted into the printed circuit module.
10. All low impedance test equipment (such as pulse generators, etc.) should be connected to CMOS
device inputs after power is applied to the CMOS circuitry. Similarly, such low impedance
equipment should be disconnected before power is turned off.
11. Replacement modules shipped separately from the factory will be packaged in a conductive material.
Any modules being transported from one area to another should be wrapped in a similar material
(aluminum foil may be used). Never use non-conductive material for packaging these modules.
02/12 2
Features and Benefits of the ITR2000A Tone Remote Desk Set
Feature Benefit
Description
Programmable 4-frequency
function control
Parallel status updating Enhanced system flexibility when multiple desk sets are connected in
Line Operated Transmit Light
(LOTL)
Intercom capability Desk set users can communicate without radio transmission.
Monitor Users can hear co-channel activity.
Programmable voice delay User can speak immediately after pressing PTT or transmitter without
Front-mounted controls and
adjustments
Parallel TX audio
(two- or four-wire)
Full-duplex capable with two- or
four-wire
Adjustable RX input sensitivity
and TX output level
Any one of 16 EIA standard tones can be programmed for each
frequency/function key.
parallel. Each desk set operator knows the selected frequency.
LEDs indicate when another desk set is transmitting; selectable
speaker mute. Can be used to solve feedback problems.
clipped words.
Includes mute/unmute and local speaker on/off.
User can hear audio transmitted by another desk set.
Two-wire full-duplex operation with two-wire adapter useful for fullduplex and trunking radio systems. (See the GAI-Tronics ITA2000.)
Allows flexibility with different radio systems and user environments
where radio output levels, line loses, and noise factors vary.
Line receive and transmit
compression
Built-in internal mic and speaker Allows for handset-free communication.
Audio accessory connection Users have numerous audio accessory options to maximize ease-of-
Scanning operation (when
installed with ITA2000S
Scanning Adapter)
3 02/12
Automatically normalizes varying input and output levels caused by
system factors.
use and productivity.
Identifies received audio frequency.
Description ITR2000A Tone Remote Desk Set
Introduction to the ITR2000A Desk Set
The ITR2000A Desk Set is an effective tool for maximizing the flexibility of radio systems. When used
with a tone remote adapter, it provides numerous options for remote control of base station radio.
Control point distances are limited only by telephone line capabilities (usually 300 miles). The number
of desk sets that can be set up in parallel is dependent on radio system design.
The standard features include parallel status updating, four-frequency control, monitor, intercom, line
operated transmit light (LOTL), parallel transmit mute, programmable voice delay, and full-duplex
capability.
Desk Set Button Panel
Refer to the figure below for the locations of the buttons and LEDs on the desk set button panel.
Volume Buttons: The desk set includes two buttons
labeled
They increase and decrease the local speaker volume, mic
levels, and are used as programming function keys.
CTL: The CTL (Control) button is used in conjunction
with
speaker.
IC: The IC (Intercom) button allows communication
between desk set users without transmission over the
radio, and is used in programming functions.
VOLUME imprinted with up and down arrows.
VOLUME Up and VOLUME Down to control the local
F1 F2
ITR2000
TONE REMOTE
F3 F4
VOLUME
CTL IC
Monitor Button and LED: The MONITOR button is used to
place the radio in the monitor mode. The
MONITOR LED
illuminates while the unit is in the monitor mode, and it
MONITOR
TRANSMIT
flashes as indication when a parallel-connected device is
transmitting.
Monitor Button and LED: The red TRANSMIT button is
used to initiate voice transmissions by placing the desk set
in the transmit mode. The
TRANSMIT LED illuminates
Front View of the ITR2000A Desk Set
Button Panel
when transmitting, and it flashes as indication when a
parallel-connected device is transmitting.
F1, F2, F3, and F4 Programmable Buttons: The four buttons can each be programmed with one of 16
available function tones. Each button contains an internal red LED that lights to indicate that it is
currently selected. They are also used as indicator for the line output level and line-in sensitivity
adjustments.
02/12 4
ITR1000A Tone Remote Desk Set Description
Internal Microphone and Speaker
The handset must be on-hook in order to use the internal microphone, which is intended for use in low
noise environments. The internal microphone and speaker are provided to allow hands-free
communication.
Handset
The desk set is equipped with a handset with a coil cord used for receiving and transmitting calls. The
handset includes a push-to-talk (PTT) pressbar.
Connectors
The ITR2000A includes a five-pin 12 V dc nominal power connector, an eight-pin audio accessory
connector, and a modular phone line connector on the rear. The locations are shown in the figure below:
ITR2000A Desk Set – Rear View
Power Connector
The ITR2000A is powered by a listed ac wall transformer supplying nominal 12 V dc. The operating
range is 10.5 to 15 V dc. The five-pin power connector diagram and pinout are shown below:
Pin Function
1 -IN
2 Battery +IN
3 +IN
4 -IN
5 +IN
5 02/12
Description ITR2000A Tone Remote Desk Set
Audio Accessory/RS-232 Port (P411)
The ITR2000A contains an eight-pin modular desk mic port to provide audio accessory options. Possible
accessories include desk mic, gooseneck mic, boom mic, headset, or footswitch. The port is also used as
the connector to a PC for CARD Suite programming.
Mic Input Pin Function
Type: Passive input 1 B+ OUT (through 10 ohm)
Input Impedance: >2k ohm 2 RS-232 TX OUT
Nominal Input Level: −20 dBm 3 Monitor IN (closure to ground)
Input Adjustment Range: N/A 4 AGND
5 Mic IN (with bias voltage)
6 PTT IN (closure to ground)
7 RS-232 RX IN
8 RX audio OUT (handset audio)
Line Connector (P401)
The modular six-pin line connector is located on the rear of the desk set. See rear view diagram above.
The line connector pinout and diagram are shown below:
Pin Function
1
2 Four-wire RX +IN
3 Two-wire TX +OUT/RX IN
4 Two-wire TX –OUT/RX IN
5 Four-wire RX –IN
6
02/12 6
ITR1000A Tone Remote Desk Set Description
Control Tones
Standard EIA tone keying tones are used for controlling the radio system. The sequence is:
A 2175 Hz High Level Guard Tone (HLGT) for 120 ms.
One of 16 function tones (FT) is sent for 40 ms.
FTs range from 2050 Hz to 550 Hz in 100 Hz steps. The FT level is 10 dB lower than the HLGT.
Monitor
FT1
FT2
FT3
2050
1950
1850
1750
FT4
FT5
FT6
FT7
1650
1550
1450
1350
FT8
FT9
FT10
FT11
1250
1150
1050
950
FT12
FT13
FT14
FT15
850
750
650
550
A 2175 Hz Low Level Guard Tone (LLGT) is generated for the duration of the transmission. The
LLGT is not generated during monitor. Because voice is present with this LLGT, a 2175 Hz filtering
is required in the tone panel.
When the monitor (CTCSS disable) is activated, the HLGT is generated for 120 ms, then a function tone
of 2050 Hz is generated for 40 ms.
Tone Levels
Assuming that the ITR2000A has the HLGT output level set to 0 dBm:
The FT level and audio voice level are –10 dBm (10 dB below HLGT)
The LLGT level is –30 dBm.
The HLGT and FT durations are programmable.
Some tone panels use the value of the FT frequency to provide certain radio control functions. If the
radio supports channel changes from an external logic source, the FT1 frequency of 1950 Hz could be
used to change the radio to channel 1. An FT6 frequency of 1450 Hz could change the radio to
channel 6.
Accessories
Description Part No.
GAI-Tronics Programming Bundle CD XAC4000A
Desk Microphone XDM004A
Footswitch (requires XAAB002A) XFS002A
Gooseneck Microphone XGM002A
Amplified Headset, Single Earpiece (requires coiled cord) XHS003C
Coiled Cord for XHS003C (requires XAAB002A) XCC004B
Coiled Cord with PTT for XHS003C (requires XAAB002A) XCC003C
Programming Cable XAC0004A
Audio Accessory Box XAAB002A
7 02/12
Description ITR2000A Tone Remote Desk Set
Field Replacement Items
Description Part No.
PTT Handset with Cord, Black HANDSET-BLACK
Replacement Power Supply, 100–240 V ac/12 V dc 40419-008
Power Supply Adapter, European 40420-001
Power Supply Adapter, UK 40420-002
Power Supply Adapter, Australia 40420-003
Power Supply Adapter Korea 40420-004
Replacement Main PCBA 69296-003
Replacement Power Supply PCBA 69298-001
Replacement Speaker Assembly 61501-014
Performance Specifications
Color ..................................................................................................................................................... Black
Physical size .................................................................................................... 7.6 W 8.9 L 4.7 H inches
Weight ................................................................................................................................................ 2.4 lbs.
Temperature range .............................................................................................................. −35º C to +70º C
Humidity ...................................................................................................... 95% at 50º C (non-condensing)
Power input ............................................................................................ 10.5 to16 V dc; 400 mA maximum
Frequency response....................................................... +/−3 dB from 300 to 3000 Hz (except notch filter)
Hum and noise ................................................................................... Less than –45 dB below rated outputs
Audio output to speakers ................................................. 1 watt minimum with level in compression range
Audio distortion .............................................................................................................. Less than 3% THD
Maximum number of remotes ................................................................... As required by the system design
Microphone connections ................................................................................................... Eight-pin modular
Control functions (Tones standard as shipped)
Guard tone............................................................................................................... 2175 Hz, programmable
F1 to F4 tones ..................................... Each can be programmed from 550–2050 Hz in 100 Hz increments
Monitor ......................................................... 2050 Hz, programmable 550–2050 Hz in 100 Hz increments
02/12 8
Operation
Introduction
The ITR2000A Tone Remote Desk Set provides radio system control from a remote location. The
ITR2000A control tones are sent to the remote adapter through a telephone line, and are used to control
radio functions such as transmit, channel change, and monitor.
Receive audio from the radio system is sent to the ITR2000A from the radio via the same telephone line
connection. The
These frequencies are dependent on your radio’s capabilities.
The ITR2000A is compatible with tone adapters that accept standard EIA tone keying sequences.
Front Panel Buttons
TRANSMIT Button and LED
F1, F2, F3, and F4 buttons allow selection of four different base station frequencies.
Press TRANSMIT to place the desk set in the transmit mode and initiate voice transmissions. The
TRANSMIT LED illuminates and the MONITOR LED extinguishes. See “Initiating Calls” section below.
TRANSMIT is also used in programming functions. See “Level Adjustments and Diagnostics” in the
“Installation” section of this manual.
MONITOR Button and LED
Press MONITOR to place the desk set, adapter, and the radio in the monitor mode (CTCSS/CDCSS
disable). The
MONITOR LED remains lit while in the unit is in the monitor mode. The ITR2000A
remains in the monitor mode until a call is initiated (PTT) or guard tone is detected on the line.
MONITOR is also used in programming functions. See “Level Adjustments and Diagnostics” in the
“Installation” section of this manual.
9 02/12
Operation ITR2000A Tone Remote Desk Set
IC (Intercom) Button
Press IC to communicate between desk sets without transmitting over the radio. When IC is pressed and
held, microphone audio is routed to the line without activating the radio transmitter. Other tone remote
desk sets on the same line will hear the audio automatically.
IC button is also used in programming functions. See “Level Adjustments and Diagnostics” in the
The
“Installation” section of this manual.
CTL (Control) Button
CTL
is used in conjunction with VOLUME Up and Down to manually control the local speaker when the
handset is off-hook. Press and hold
VOLUME Up/Down Buttons
CTL, and then press VOLUME Up or VOLUME Down.
Local Speaker Volume:
Press
Press
VOLUME Up or VOLUME Down to adjust the local speaker volume if the handset is on-hook.
CTL + VOLUME Up to enable the local speaker while the handset is off-hook. When the
handset is placed back on-hook, the local speaker again operates normally– that is, it will be disabled
whenever the handset is taken off-hook.
Local Speaker Mute:
Press
Press
CTL + VOLUME Down to mute the local speaker.
VOLUME Up, VOLUME Down, or CTL + VOLUME Up to unmute the local speaker.
Handset Speaker Volume (with handset off-hook):
Press
VOLUME Up or VOLUME Down to adjust the handset speaker volume.
The volume control buttons are also used to adjust the sensitivity of the selected microphone, and in
programming functions. Refer to the “Microphone Sensitivity and Level Adjustments and Diagnostics”
in the “Installation” section for further instructions.
02/12 10
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