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L3149B
User Manual
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GAI-Tronics L3149B User Manual

Pub. 43004-023D
GAI-TRONICS® CORPORATION
A HUBBELL COMPANY
L3149B (C200)
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 that 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.
MDC is a registered trademarks of Motorola, Inc.
02/12 Pub. 43004-023D ii

Table of Contents

FOREWORD ............................................................................................................................................................... 1
SCOPE OF MANUAL .................................................................................................................................................... 1
NOMENCLATURE ........................................................................................................................................................ 1
ORDERING REPLACEMENT PARTS .............................................................................................................................. 1
SERVICE AND REPAIR ................................................................................................................................................. 1
FEATURES AND BENEFITS ........................................................................................................................................... 2
FCC INTERFERENCE WARNING .................................................................................................................................. 3
SAFE HANDLING OF CMOS INTEGRATED CIRCUIT DEVICES ...................................................................................... 3
PERFORMANCE SPECIFICATIONS ................................................................................................................................. 4
DESCRIPTION............................................................................................................................................................ 5
PHYSICAL DESCRIPTION ............................................................................................................................................. 5
SIGNALING BUTTONS.................................................................................................................................................. 6
PROGRAMMABLE BUTTONS, PROG 1/5 THROUGH PROG 4/8 .................................................................................... 6
VOLUME BUTTONS ..................................................................................................................................................... 6
LOCK BUTTON ........................................................................................................................................................... 6
IC (INTERCOM) BUTTON ............................................................................................................................................ 6
MONITOR BUTTON ..................................................................................................................................................... 6
TRANSMIT BUTTON .................................................................................................................................................... 6
TRANSMIT LED .......................................................................................................................................................... 6
MONITOR LED ........................................................................................................................................................... 7
KEYPAD BUTTONS ..................................................................................................................................................... 7
LCD DISPLAY ............................................................................................................................................................ 7
INTERNAL MICROPHONE ............................................................................................................................................ 7
HANDSET ................................................................................................................................................................... 7
ACCESSORIES ............................................................................................................................................................. 8
FIELD REPLACEMENT ITEMS ...................................................................................................................................... 8
PROGRAMMING .......................................................................................................................................................... 8
OPERATION ............................................................................................................................................................... 9
OPERATIONAL DESCRIPTION ...................................................................................................................................... 9
DISPLAY ..................................................................................................................................................................... 9
SETTING THE CLOCK ................................................................................................................................................ 10
RECEIVING CALLS .................................................................................................................................................... 10
INITIATING CALLS .................................................................................................................................................... 11
HANDSET TRANSMIT ................................................................................................................................................ 11
TRANSMIT FROM INTERNAL (LOCAL) MICROPHONE ................................................................................................ 11
TRANSMIT FROM DESK MICROPHONE OR FOOTSWITCH ........................................................................................... 11
FRONT PANEL BUTTONS ........................................................................................................................................... 12
Signaling Buttons ................................................................................................................................................ 12
Programmable Buttons, PROG 1/5 through PROG 4/8 ..................................................................................... 12
VOLUME Up and VOLUME Down Buttons ....................................................................................................... 13
LOCK Button ...................................................................................................................................................... 13
IC (Intercom) Button ........................................................................................................................................... 13
MONITOR Button ............................................................................................................................................... 13
TRANSMIT Button .............................................................................................................................................. 13
Keypad Buttons ................................................................................................................................................... 13
02/12 Pub. 43004-023D iii
Table of Contents L3149B (C200) Advanced Tone Remote Desk Set
NUMERIC KEYPAD FREQUENCY SELECTION ............................................................................................................. 14
FREQUENCY DISPLAY ............................................................................................................................................... 14
PARALLEL STATUS OPERATION (TONE OPERATION ONLY) ...................................................................................... 15
PTT FREQUENCY ..................................................................................................................................................... 16
TONE SUPERVISOR CONTROL ................................................................................................................................... 16
ALERT TONES .......................................................................................................................................................... 16
PAGING .................................................................................................................................................................... 17
Entering the Paging Menu .................................................................................................................................. 17
Selecting the Page Type ...................................................................................................................................... 17
Entering Capcode Digits for Paging ................................................................................................................. 17
Entering a Programmed Alias ............................................................................................................................ 18
Sending the Page ................................................................................................................................................ 18
MDC1200 APPLICABILITY ....................................................................................................................................... 19
Entering the MDC Menu ..................................................................................................................................... 19
Selecting the MDC1200 Type ............................................................................................................................. 19
Entering the Unit ID for MDC1200 .................................................................................................................... 19
Entering a Programmed Alias ............................................................................................................................ 19
Sending the MDC1200 Message ......................................................................................................................... 20
Group Calls and Wildcards ................................................................................................................................ 20
Acknowledgments ................................................................................................................................................ 20
Select Call ........................................................................................................................................................... 21
Exiting the MDC Menu ....................................................................................................................................... 21
RS-232/Printer Output ........................................................................................................................................ 21
RS-232 Input or PC Control ............................................................................................................................... 22
MDC1200 ........................................................................................................................................................... 23
Paging ................................................................................................................................................................. 24
Frequency Changing........................................................................................................................................... 25
Custom Tones ...................................................................................................................................................... 25
INSTALLATION ....................................................................................................................................................... 27
PLANNING THE INSTALLATION .................................................................................................................................. 27
MECHANICAL RECEIPT INSPECTION ......................................................................................................................... 28
MOUNTING ............................................................................................................................................................... 28
FCC INTERFERENCE WARNINGS .............................................................................................................................. 28
ELECTROSTATIC DISCHARGE (ESD) PROTECTION .................................................................................................... 28
EQUIPMENT REQUIRED ............................................................................................................................................. 29
CABLE INSTALLATION SAFETY CONSIDERATIONS..................................................................................................... 29
POWER CONNECTIONS.............................................................................................................................................. 29
LINE CONNECTIONS FOR THE L3149B DESK SET ..................................................................................................... 30
Line Considerations - Private Circuit ................................................................................................................. 30
Circuit Conditioning ........................................................................................................................................... 30
LINE CONNECTIONS FOR LOCAL CONTROL (L3147A) OPERATION ........................................................................... 31
MICROPHONE SENSITIVITY ADJUSTMENTS ............................................................................................................... 32
Internal Microphone ........................................................................................................................................... 32
Handset Microphone ........................................................................................................................................... 32
Accessory Microphone ........................................................................................................................................ 32
RELAY CONTROL...................................................................................................................................................... 33
E&M .................................................................................................................................................................... 33
E-Lead................................................................................................................................................................. 33
M-Lead ................................................................................................................................................................ 33
E&M with Tone Control...................................................................................................................................... 33
AUDIO ACCESSORY/RS-232 PORT ........................................................................................................................... 34
Audio Accessory/RS-232 Port Pinout ................................................................................................................. 34
02/12 Pub. 43004-023D iv
L3149B (C200) Advanced Tone Remote Desk Set Table of Contents
MOUNTING ............................................................................................................................................................... 34
LEVEL ADJUSTMENTS AND DIAGNOSTICS ................................................................................................................. 35
RELOADING FACTORY DEFAULTS ............................................................................................................................. 36
MAIN DIAGNOSTICS SELECTION ............................................................................................................................... 36
PROG 1/5 - LINE OUTPUT ADJUST ........................................................................................................................... 36
PROG 2/6 - LINE IN SENSITIVITY ............................................................................................................................. 37
PROG 3/7 - INTERNAL DIAGNOSTICS ....................................................................................................................... 37
PROG 2/6 - DC Module Diagnostics .................................................................................................................. 38
PROG 1/5 - Relay Module Diagnostics .............................................................................................................. 38
PROG 3/7 – RS-232 Diagnostic ......................................................................................................................... 39
PROG 4/8 - Keyboard Diagnostic ...................................................................................................................... 39
PROG 4/8 - TONE LEVEL ADJUST ............................................................................................................................ 40
PROG 1/5 - Sidetone Level Adjust Mode ............................................................................................................ 40
PROG 2/6 - Alert Tone Level Adjust Mode ......................................................................................................... 40
PROG 3/7 - Page Tone Line Level Adjust Mode ................................................................................................ 40
THEORY OF OPERATION .................................................................................................................................... 41
GENERAL DESK SET OVERVIEW ............................................................................................................................... 41
RECEIVE AUDIO ....................................................................................................................................................... 41
SPEAKER AUDIO ....................................................................................................................................................... 41
TRANSMIT AUDIO ..................................................................................................................................................... 41
MICROPHONE AUDIO ................................................................................................................................................ 42
GUARD TONE DETECTION ........................................................................................................................................ 42
RELAY CONTROL MODULE....................................................................................................................................... 42
RESET CIRCUIT ......................................................................................................................................................... 42
PROGRAMMING ..................................................................................................................................................... 43
PC PROGRAMMING................................................................................................................................................... 43
General Description............................................................................................................................................ 43
Hardware/Software Requirements ................................................................................................ ...................... 43
Communication Port ........................................................................................................................................... 43
Connections ........................................................................................................................................................ 43
Installing the Programming Software ................................................................................................................. 43
DESK SET PARAMETERS ........................................................................................................................................... 44
PARAMETERS - LINE CONFIGURATION ...................................................................................................................... 45
CONTROL PARAMETERS ........................................................................................................................................... 47
FUNCTION TONES/ALIASES ...................................................................................................................................... 48
PROGRAMMABLE BUTTONS ...................................................................................................................................... 49
INPUT/OUTPUT RELAY TABLE .................................................................................................................................. 51
CONFIGURE PAGING ................................................................................................................................................. 53
MANUAL PAGING ..................................................................................................................................................... 54
DTMF PAGING ......................................................................................................................................................... 54
TWO-TONE PAGING .................................................................................................................................................. 55
PLECTRON PAGING ................................................................................................................................................... 57
5-TONE PAGING ....................................................................................................................................................... 59
1500 PAGING ............................................................................................................................................................ 60
2805 PAGING ............................................................................................................................................................ 60
CONFIGURE MDC1200 ............................................................................................................................................ 61
MDC Feature Order ........................................................................................................................................... 61
MDC Pretime Timers .......................................................................................................................................... 61
MDC Flags ......................................................................................................................................................... 62
MDC Timers........................................................................................................................................................ 64
MDC Printer Message Settings ........................................................................................................................... 65
02/12 Pub. 43004-023D v
Table of Contents L3149B (C200) Advanced Tone Remote Desk Set
ALIAS TABLE ............................................................................................................................................................ 66
TROUBLESHOOTING ............................................................................................................................................ 69
TROUBLESHOOTING THE L3149B (C200) ADVANCED DESK SET ............................................................................. 69
FUSE REPLACEMENT ................................................................................................................................................ 70
SCHEMATICS .......................................................................................................................................................... 71
DESK SET LINE INTERFACE SCHEMATIC DIAGRAM - SHEET 1 .................................................................................. 72
DESK SET USER AUDIO I/O SCHEMATIC DIAGRAM - SHEET 2 .................................................................................. 73
DESK SET CONTROL MICROPROCESSOR I/O SCHEMATIC DIAGRAM - SHEET 3 ......................................................... 74
DESK SET DSP BLOCK SCHEMATIC DIAGRAM - SHEET 4 ......................................................................................... 75
DESK SET TONE KEYPANEL SCHEMATIC DIAGRAM - SHEET 5 ................................................................................. 76
DESK SET POWER SUPPLY SCHEMATIC DIAGRAM - SHEET 6 .................................................................................... 77
DESK SET SIGNALING SECTION SCHEMATIC DIAGRAM - SHEET 7 ............................................................................. 78
RELAY I/O OPTION SCHEMATIC DIAGRAM (XRC0001A) ......................................................................................... 79
CIRCUIT BOARDS .................................................................................................................................................. 81
MAIN UNIT DTD CIRCUIT BOARD ............................................................................................................................ 82
MAIN UNIT POWER AND LINE CIRCUIT BOARD ........................................................................................................ 83
RELAY I/O OPTION CIRCUIT BOARD......................................................................................................................... 84
DEFINITIONS AND ACRONYMS ......................................................................................................................... 85
02/12 Pub. 43004-023D vi

Foreword

Scope of Manual

This manual offers descriptive data and service information for the L3149B (C200) Advanced 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 of the unit, specifically identifies GAI­Tronics 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
Fax 610-796-5954
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
1
Foreword L3149B (C200) Advanced Tone Remote Desk Set

Features and Benefits

Feature Benefit
Programmable 16-frequeny control with alias (Tone mode only)
Any one of 16 EIA standard tones can be programmed for each frequency/function key along with an alias for each.
LCD display User-friendly interface displays frequency alias, mode status and
diagnostic information.
Programmable buttons Four buttons provide up to eight user-defined actions, i.e., frequency
selection, alert tones, and button mapping.
Programmable inputs and outputs Inputs and outputs can be configured for a variety of selections.
(Requires relay control option to be installed.)
Paging Manual DTMF, 2-tone, Plectron, 5-tone; Immediate DTMF, Aliased
DTMF, 2-tone, Plectron, 5-tone, custom 2-tone, group paging. Auto channel select for manual and aliases. Programmable talk time allows for greater flexibility.
MDC1200 Encode: Call Alert, Select Call, Radio Check, Radio Enable/Disable.
Decode: Call Alert, Select Call, Radio Check, Status Message, Emergency.
Frequency selection Select frequency changes via keyboard, scroll or programmable
buttons.
Parallel status updating (Not available in local mode)
Enhanced system flexibility when multiple desk sets are connected in parallel. Each desk set operator knows the selected frequency.
Local, E&M, E&M with tone control; and CDM1550 LS Mobile
Offers flexibility in types of remote and local control (requires options to be installed).
Radio compatible
Compatible with CDM1550 LS Mobile Radio (Local mode only)
In local mode of operation (designated as L3147 in the software), a clear-to-send input can be used to automate transmissions using CDM1550 LS Mobile Radio systems.
Line operated transmit light (LOTL)
LED indicates when another desk set is transmitting, selectable speaker mute. Can be used to solve feedback problems.
Intercom capability Desk set users can communicate without radio transmission.
Programmable voice delay Speak immediately after pressing PTT or transmitter without clipped
words.
Front-mounted controls Includes mute/unmute and local speaker on/off.
Parallel transmit audio two-wire or four-wire
Allows two-wire full-duplex operation with two-wire adapter. This is useful for full-duplex and trunking radio systems.
Built-in internal mic and speaker Allows for hands-free communication.
Adjustable RX input sensitivity and TX output level
Allows flexibility with different radio systems and user environments where radio output levels, line losses, and noise factors vary.
Line RX and TX compression Automatically normalizes varying input and output levels caused by
system factors.
2
L3149B (C200) Advanced Tone Remote Desk Set Foreword

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.

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 over-voltage 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 minimizes 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) that is connected to ground through 100k of resistance.
7. When soldering, be sure the soldering iron is grounded.
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.
3
Foreword L3149B (C200) Advanced Tone Remote Desk Set
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.

Performance Specifications

Color ..................................................................................................................................................... Black
Physical size .................................................................................................... 7.6 W 8.9 L 4.7 H inches
Weight ................................................................................................................................................ 2.4 lbs.
Temperature range .............................................................................................................. −35 C to +70 C
Humidity ..................................................................................................... 95% at 50 C (non-condensing)
Line impedance ................................................................................................................ 600 ohms nominal
Power input ...................................................... 10.5–16 V dc; 500 mA maximum from supplied ac adapter
Safety ..............................................................................................
Powered by UL-listed (E104603) and CSA-certified (LR67888) Class 2 ac adapter.
Class III SELV powered equipment.
Emissions: ....................................................................... USA: FCC Part 15, Sub. B- Verification.
Canada: ICES – 003
Line interface ................................................................................................................ FCC Part 68 Exempt
(Category II Tariff #260 service for private/leased line applications)
Nominal input level ........................................................................................................................ −10 dBm
Nominal output level ...................................................................................................................... −10 dBm
Range −15 to +5 dB into 560 ohms
Frequency response...................................................................... +
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 .................................................................................................................. Ten
Control functions
Guard Tone .......................................................................................................................... 2175 Hz
F1–F16 .................................... Each is programmable from 550 to 2050 Hz in 100-Hz increments
Monitor ................................... 2050 Hz, Programmed from 550 to 2050 Hz in 100-Hz increments
3 dB, 300–3000 Hz (except notch filter)
4

Description

Physical Description

The L3149B (C200) Advanced Tone Remote Desk Set provides a console-like alternative to conventional and CDM1550 LS Mobile Radio control.
By adding the optional relay module to the L3149B Desk Set, the C200 can be configured for E&M and tone with E&M control allowing further possibilities for remote dispatch. In addition, by configuring for local operation (L3147A) with the XAC0008A software, the C200 can be configured to operate with the CDM1550 LS Mobile Radio for local control (L3147A).
When used with a compatible remote adapter, the L3149B Desk Set gives users cost-effective dispatch control. Virtually every aspect of the operation of these units can be programmed using the C200 XAC0008A Programming Software for unique control needs. The multiple frequency control, two-line LCD display, aliasing functions, intercom, parallel status updating, programmable voice delay, and multiple desk set support are standard features that provide powerful fixed station control.
Each of the four programmable buttons can configured to perform two functions. In addition, there are two standard inputs and outputs for local operation and four optional inputs and outputs for standard tone operation that can be programmed for various uses.
C200
GAI-TRONICS
PAGE CLEAR SELECT DOWN UP
MDC
Prog 1/5 Prog 2/6 Prog 3/7 Prog 4/8
3C2B1A
6F5E4D
789
*
#0
VOLUME
LOCK IC
MONITOR
TRANSMIT
DOWN UP
Freq
Front View of the Advanced L3149B (C200) Desk Set
5
Description L3149B (C200) Advanced Tone Remote Desk Set

Signaling Buttons

Refer to the diagram above for the location of the front panel buttons. The following paging buttons are used for paging and initiating alert tones:
MDC SELECT PAGE DOWN CLEAR UP
The function and operation of each of the paging buttons is discussed in the Operations section of this manual.

Programmable Buttons, PROG 1/5 through PROG 4/8

The programmable buttons labeled, PROG 1/5, PROG 2/6, PROG 3/7, and PROG 4/8, can each be
configured to perform two separate functions. Depending on its configuration, the selected button illuminates when it is pressed. It continues to be illuminated until a different button is pressed.

Volume Buttons

The units contain two buttons labeled VOLUME. They are imprinted with up and down arrows, and are
used to increase and decrease the local speaker volume and microphone levels. They are also used as programming function keys.

Lock Button

The LOCK button is used in conjunction with other buttons to provide secondary key functions.

IC (Intercom) Button

The Intercom button, labeled IC, allows communication between desk set users without transmission over
the radio. When this button is pressed and held, microphone audio is routed to the line without activating the radio transmitter. Other desk sets in parallel hear the audio automatically.

Monitor Button

The MONITOR button (PL/DPL disable) is used to place the radio in the monitor mode.

Transmit Button

The red TRANSMIT button is used to initiate voice transmissions. Pressing the TRANSMIT button places
the desk set in the transmit mode.

Transmit LED

The TRANSMIT LED, located to the left of the button, illuminates when transmitting.
6
L3149B (C200) Advanced Tone Remote Desk Set Description

Monitor LED

The MONITOR LED, located to the left of the button, illuminates when monitor is activated.

Keypad Buttons

The numeric keypad is used for the selection of a desired frequency, page capcode entry and MDC1200 ID entry. See the Operations section of this manual for further information.

LCD Display

Each of the desk sets includes a backlit 2 16 character LCD display for operator information.

Internal Microphone

This microphone is intended for use in low noise environments. The handset must be on-hook in order to use the microphone.

Handset

Each 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.
Rear View of Desk Set
7
Description L3149B (C200) Advanced Tone Remote Desk Set

Accessories

Description Part No.
Desk Microphone XDM004A
Desktop Gooseneck Microphone (requires XAAB002A) XDM005A
Footswitch (requires XAAB002A) XFS002A
Tone Remote Adapter ITA2000A
Audio Accessory Box XAAB002A
Amplified Headset, Single Earpiece (requires coiled cord) XHS003C
Coiled Cord for XHS003C (requires XAAB002A) XCC004B
Coiled Cord with PTT for XHS003C (requires XAAB002A) XCC003C

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 Speaker Assembly 61501-014
Replacement Main PCBA with MDC 1200 Feature 69812-004
Replacement Power Supply PCBA 69298-001

Programming

Description Part No.
Programming Bundle CD XAC4000A
Programming Cable with Adapter XAC0004A
8

Operation

Operational Description

The L3149B (C200) Desk Set provides radio system control from a remote location. The desk set sends control to the remote adapter through a telephone line to control radio functions such as transmit, channel changes, and monitor. When programmed for local (L3147A) operation, the desk set can be used for extended local control of the radio system.
Receive audio from the radio system is sent to the desk set via the same line connection in 2-wire applications, or by using another pair in 4-wire applications.
The numeric keypad buttons are used for selection of different base station frequencies. These frequencies are dependent upon your radio's capabilities. Changes to system parameters require the use of the XAC4000A Programming Bundle CD (includes C200 programming software), which is sold separately. Complete information is contained in the Programming section of this manual.

Display

The L3149B (C200) Desk Set has a backlit 2 16 character super-twist LCD display to provide valuable operator information. This information allows the operator to determine the state of the unit quickly. The features of the display are as shown below.
Line 1 of the display shows:
Currently selected frequency. The current state of the unit. This can be: receive,
alert,
ALT; or supervisor, SPV.
FREQ XX is the frequency number or alias.
RX; transmit, TX; intercom, IC; monitor, MON;
LCD (Liquid Crystal Display at Power-up
Line 2 of the display shows:
Speaker/handset audio level Internal/handset microphone level Frequency, page and MDC1200 selection information Various diagnostic information
9
Operation L3149B (C200) Advanced Tone Remote Desk Set

Setting the Clock

1. Power up the C200 Advanced Desk Set.
2. Wait for the message
3. When the message
CHECKING PARAMETERS PLEASE WAIT to clear.
L314XA VER. C2HXX C2DXX appears, immediately press the MDC button in the
upper left hand corner of the key panel.
4. The message on the display will read
ENTER HH:MM:SS.
5. Use the numeric keys to enter the hour, the minutes, and the seconds.
6. When complete, press the
7. The message on the display will read
TRANSMIT button.
ENTER AM=1 PM=2.
8. Use the numeric keys to select between AM and PM.
9. When complete, press the
10. The message on the display will read
TRANSMIT button.
ENTER DD-MM-YY.
11. Use the numeric keys to enter the day of the month, the month of the year, and the year.
12. When complete, press the
TRANSMIT button.
13. The display will now show the normal mode of operation of the C200 Advanced Desk Set.

Receiving Calls

When power is applied, the desk set is in the receive mode, allowing receive audio to be heard through the speaker or handset. The desk set is always in receive mode unless the unit is transmitting or a parallel desk set is transmitting.
All the models contain an internal or local speaker and a handset speaker that operate as follows:
When the handset is in the cradle, or on-hook, receive audio is heard on the local internal speaker. In
some operational modes, this can be changed.
When the handset is off-hook, receive audio is routed to the handset. By using the front panel buttons,
you may optionally select to hear audio through the local speaker in addition to the handset.
10
L3149B (C200) Advanced Tone Remote Desk Set Operation

Initiating Calls

Before initiating a call in a conventional system, press the MONITOR button to verify that the radio
channel is clear. Always allow time for the radio channel to be established. In addition, if the unit is configured to generate PTT IDs and to generate side tone, a tone will be heard during the PTT pretime and PTT generation. A voice delay can be programmed via the programming software to eliminate this waiting time if no PTT ID is used.
To initiate a call, press the PTT button. When the desk set is transmitting, the
TRANSMIT button, the handset push-to-talk (PTT) pressbar, or an accessory
TRANSMIT LED illuminates. The TRANSMIT button
or handset PTT bar must be held down while talking to the radio user and released to listen. When the transmission is completed, the
TRANSMIT LED extinguishes and the desk set returns to the receive mode.
In a CDM1550 LS Mobile Radio system operating in the local control mode, the radio provides an output as indication that a channel has been established. The
TRANSMIT LED illuminates when this occurs and
the user can transmit. If no channel can be established, the display shows “SYS NOT AVAIL”.

Handset Transmit

Use of the handset is recommended when the desk set is located in noisy surroundings or if full-duplex 2-wire operation is desired. This may be used for types of systems that provide talk courtesy tones, such as trunking. Press the handset PTT bar or transmit when the handset is off-hook and after the
TRANSMIT button and speak into the handset microphone to
TRANSMIT LED lights.

Transmit From Internal (Local) Microphone

Use the internal microphone only in low noise environments. The handset must be on-hook for the local microphone to operate. Press the after the
TRANSMIT LED lights. For the best transmit audio quality, maintain a distance of about 18
inches from the microphone.
TRANSMIT button and speak in the direction of the integral microphone

Transmit From Desk Microphone or Footswitch

All models can be keyed to transmit with an external desk microphone through the audio accessory port. When a PTT signal is asserted through this port, TX audio will also originate through this port. Use of the XDM002A Desk Mic is recommended.
N
OTE: The polarity of the desk mic PTT and monitor inputs is programmable. If the polarity of either of
these inputs is set for normally closed, it is necessary to keep the desk microphone connected at all times. Removing the microphone during operation may cause the keyboard to stop responding. This is caused by the internal pull-ups on these two pins. If the desk mic maintains a normally closed connection to ground, the connection is opened when the button is pressed and the desk set recognizes the key as pressed. Without the desk mic connected, the connection remains open and the desk set continually sees the key pressed.
11
Operation L3149B (C200) Advanced Tone Remote Desk Set

Front Panel Buttons

Signaling Buttons

The signaling buttons operate as follows:
MDC
MDC button is used to enter MDC mode. While in MDC mode, the operator may select from among
The various MDC1200 messages to be transmitted. These include Call Alert, Radio Check, Select Call, and Radio Enable/Disable.
PAGE
The PAGE button is used to enter page mode. While in page mode, the operator may select from among
various types of pages to be transmitted. These include DTMF, 2-Tone, Plectron, 5/6-Tone, 2805, 1500, and Immediate DTMF.
CLEAR
The CLEAR button uses include clearing the frequency selection during frequency selection mode,
clearing a capcode entry in paging mode, clearing a unit ID in MDC mode, or clearing the MDC status from the second line of the display.
SELECT
The SELECT button is used to select a frequency in frequency selection mode, select a paging type in
page mode or select a MDC1200 type in MDC mode. Note that in paging and MDC modes, the button moves forward through the list. Using
UP/DOWN BUTTONS
LOCK + SELECT moves backward through the list.
SELECT
The UP and DOWN buttons are used to scroll through the MDC1200 message queue in normal operation
or through the available paging and MDC aliases in paging and MDC modes.

Programmable Buttons, PROG 1/5 through PROG 4/8

These four buttons with LED indicators are used to custom configure up to eight user functions. When shipped from the factory, the programmable buttons are disabled. Use the XAC0008A C200 Programming Software to program the functions. The use and function of these keys are dependent upon your radio's capabilities.
12
L3149B (C200) Advanced Tone Remote Desk Set Operation

VOLUME Up and VOLUME Down Buttons

Press the VOLUME Up or Down buttons to adjust the local speaker volume if the handset is on-hook. The
handset speaker volume is adjusted if the handset is off-hook.
The display shows the new setting for 2 seconds after a volume change. The internal, handset, and accessory each have individual settings. When the handset is off-hook, the following message is displayed:
HANDSET VOL: X
The VOLUME Up and VOLUME Down buttons adjust the sensitivity of the microphone that is currently in
use. While holding down the
VOLUME Up or VOLUME Down buttons. This display will indicate the MIC SENSITIVITY setting in a
TRANSMIT button, handset PTT bar, or the accessory PTT, press the
range of 1 to 5 with 1 being the least sensitive and 5 the most sensitive. Note that each microphone, internal, handset, and accessory each has its own independent sensitivity setting. Refer to the Settings and Adjustments in the Installation section of this manual for more information.
Pressing the
LOCK + VOLUME Up buttons will activate the internal speaker when the handset is off-hook.
This can be used if others must hear the conversation. When the handset is returned to the cradle, this setting is reset so that if the handset is again removed from the cradle, the internal speaker is not active.
Pressing the
VOLUME Up, VOLUME Down, LOCK + VOLUME Up, or removing the handset from the cradle and
LOCK + VOLUME Down buttons will mute the internal speaker indefinitely. Pressing
returning it will reset this setting.

LOCK Button

The LOCK button is used in conjunction with other buttons for additional button operation.

IC (Intercom) Button

To communicate between desk sets without transmitting over the radio channel, press and hold the IC button. Microphone audio is routed to the line without activating the radio transmitter. Other desk sets on the same line will hear the audio automatically. Note that when configured for 4-wire operation, the internal intercom path must be enabled by the programming software for parallel units to hear intercom audio.

MONITOR Button

When the MONITOR button is pressed, the desk set, adapter, and the radio are placed in the monitor mode
(PL/DPL disabled), the
MONITOR LED illuminates, and the display indicates MON. Press this button
before making a call to ensure a clear radio channel is available.

TRANSMIT Button

Press this button to place the desk set in the transmit mode. See the Initiating Calls section. When the
TRANSMIT button is pressed and a channel has been established, the TRANSMIT LED illuminates, and MONITOR LED (if lit) extinguishes. The display indicates the mode and current frequency selected.

Keypad Buttons

The numeric keypad is used for various uses including the selection of a desired frequency, page capcode entry, and MDC1200 ID entry. See Numeric Keypad Frequency Selection in this section of the manual for further information.
13
Operation L3149B (C200) Advanced Tone Remote Desk Set

Numeric Keypad Frequency Selection

The L3149B can be configured for controlling up to 16-frequency control with the XAC0008A C200 Programming Software. When the desired frequency is selected using the numeric keypad, that frequency change command is sent to the base.
N
OTE: Tone operation only: Other parallel units will reflect the newly selected frequency (Parallel
Status Update).
To select a frequency when nine or fewer function tones are enabled, press the corresponding button 1 through 9 on the numeric keypad. The unit automatically sends the command when the key is pressed.
When ten or more frequencies are enabled, use keypad buttons 2 through 9 to select frequencies 2
through 9.
To select frequency 1, press 0, then 1. To select frequencies 10 through 16, press 1, then press 0 through 6.
If a disabled frequency is selected, the display shows:
DISABLED FREQ. Pressing the CLEAR button
exits the frequency selection mode without changing the selected frequency. To scroll through the enabled frequencies display, press
* to scroll down and # to scroll up.
After the desired frequency has been selected, the operator may:
Press the Press the
SELECT button to select the frequency and exit the frequency selection mode. MONITOR button to select the frequency, exit frequency selection mode, pause 250 ms and
send a monitor burst to monitor the newly selected frequency.
Press and hold the
TRANSMIT button or handset PTT bar to select the new frequency, exit the
frequency selection mode and begin transmitting on the newly selected frequency.

Frequency Display

When shipped from the factory, the desk set’s LCD display shows FREQ: XX, with XX being 1 to 16,
depending on the selected frequency.
Each time the unit is powered up, the status of the base/radio is unknown. The desk set LCD display flashes the last selected frequency when the unit was powered down. The display continues flashing until a transmission or frequency change is entered, or a parallel unit initiates a transmission or frequency change.
Each time a guard tone is detected on the line, the desk set assumes the status of the base/radio is unknown until a function tone is decoded at the proper time.
Note that the display remains flashing even when a monitor command is initiated after power-up. This is because the monitor command does not control which frequency is being monitored and the state of the base/radio is still unknown.
14
L3149B (C200) Advanced Tone Remote Desk Set Operation

P a r a l l e l S t a t u s O p e r a t i o n (Tone Operation Only)

The L3149B Desk Set supports parallel status updating. This feature allows all dispatch positions to know the status of the base station.
To decode this information, the unit actually senses high level guard tone (HLGT), then decodes the function tone that follows. Due to various tone control schemes supported by the unit, it is important to understand the rules of decoding the function tones.
1. If the monitor function is decoded, the unit is placed into the monitor mode. If any transmit function
tone is programmed to be the same as the monitor function tone, that transmit tone will not be decoded.
2. If two transmit function tones are programmed to the same frequency, only the first of the tones in the
sequence will be decoded; the subsequent transmit function tones set to the same frequency will not.
3. If a PTT function tone is programmed, it is not decoded since this does not contain channel control
information. If a transmit function tone is programmed to be the same as the PTT function tone, the transmit function tone will not be decoded.
4. If a transmit function tone is programmed to be the same as a tone supervisor tone, the supervisor
function will be decoded. To illustrate, the priorities of the decode function are as follows:
Highest priority: Monitor Function Tone
Supervisor On Function Tone
Supervisor Off Function Tone
PTT Function Tone
Lowest priority: Transmit Function Tone (F1 to F16)
15
Operation L3149B (C200) Advanced Tone Remote Desk Set

PTT Frequency

This feature, compatible with tone and optional E&M with tone control, allows the desk sets to use only a single function tone burst generation when a voice transmission is required. The parallel status updating function is also modified. This is useful when the base station is only capable of one frequency control or when wildcard frequency keying is required.
When a frequency change command is sent, the desk sets generate normal HLGT and function tones. When the monitor function is sent, the normal monitor command is sent. When a transmission is required, the HLGT and programmed PTT frequency is sent as the transmit
command. No other function tones are used during a voice transmission.
When a parallel unit transmission is detected, the parallel status updates the selected frequency only if
the frequency falls within programmed function tone frequencies. When a parallel PTT frequency is detected, the function tone of the unit is not updated and continues to be unknown (flashes) until a frequency change command is detected.

Tone Supervisor Control

The L3149B offers a Tone Supervisor Control feature that locks out transmission of parallel units upon detection of the proper tone control sequence. This feature cannot be activated during a parallel transmission. The supervisor unit is programmed with appropriate on/off frequencies and a supervisor button. Parallel, non-supervisor units are programmed with the same on/off frequencies.
When the supervisor unit operator presses the supervisor button and turns on the supervisor function, programmed parallel units will not allow any transmission and their keyboards are locked. The display flashes
SPV until the supervisor turns the function off.
For relay controlled supervisor (optional kit) the L3149B can be configured using a relay programmable button.

Alert Tones

Alert tones are available via the programmable buttons. Using the programmable buttons on the desk set three types of alert tones are available:
A continuous 1004 Hz alert tone. A pulsed 1500 Hz alert tone; 250 ms on/off. A warble alert tone; 250 ms at 800 Hz, 250 ms at 1500 Hz.
16
L3149B (C200) Advanced Tone Remote Desk Set Operation

Paging

These desk sets support the following formats:
DTMF 1500 Immediate DTMF 2805 2-Tone Custom 2-Tone 5-Tone
Paging may be initiated by entering digits on the numeric keypad, by programming an alias using the XAC0008A C200 Programming Software, by configuring any of the programmable buttons, or by PC control. The alias feature allows user-determined names to be assigned to specific paging capcodes. This permits selecting a frequently-used paging sequence by name rather than by re-entering digits on the keypad.

Entering the Paging Menu

Make sure the desk set is in normal operation. Press the PAGE button. The normal status line appears at
the top of the LCD display. The second line displays the paging type and spaces to indicate the number of capcode digits that must be entered.

Selecting the Page Type

The available page types are set by the programming software. Use the SELECT button to cycle forward
or
LOCK + SELECT to cycle backward through the enabled types.

Entering Capcode Digits for Paging

If the desired capcode is not currently selected, a new capcode may be entered:
Use the numeric keypad buttons to enter the paging capcode digits. Enter the digits A, B, C or D by pressing and # button, or by using
LOCK + 1, LOCK + 2, LOCK + 3, and LOCK + 4. Enter the digits E and F by using the * button
LOCK + 5 and LOCK + 6.
The LCD displays the capcode as it is entered from right to left. As new digits are entered, the previous digits are moved one position to the left and the new digit is entered in the right-most location. If another digit is entered after all the blanks are filled, the capcode will be cleared and the user must start over.
Pressing the CLEAR button clears the capcode. All blanks must be filled or the transmission cannot be
initiated.
OTE: The maximum number of digits that can be entered can be programmed using the XAC0008A
N
C200 Programming Software.
17
Operation L3149B (C200) Advanced Tone Remote Desk Set

Entering a Programmed Alias

If paging aliases have been programmed into the desk set, press either the UP or the DOWN button after
entering the paging menu. To scroll alphabetically, press the combination of either
LOCK + DOWN buttons. The alias that begins with the next (or the previous) letter of the alphabet is
LOCK + UP or
displayed.

Sending the Page

When the desired page appears on the display, press the MONITOR button to make sure the radio channel
is not in use. If programmed with an auto-channel selection, the unit selects that channel before sending the monitor control.
When the channel is free, press
TRANSMIT. Paging tones are generated once a channel is established and
the LCD displays:
TALK NOW (This is provided that talk time has been enabled for this type of paging or alias.)
Mic audio is transmitted to the paged individual. When the preprogrammed talk time has elapsed, the desk set exits the paging mode and returns to normal operation. If the 'Do not revert' option is selected, and the auto channel selection is programmed for a paging alias, the unit remains on the same channel until changed by the user.
If a channel cannot be established when using a CDM1550 LS Mobile Radio, “SYS NOT AVAIL” is displayed and the page is not sent. Additional attempts can be made by pressing the
TRANSMIT button
again.
18
L3149B (C200) Advanced Tone Remote Desk Set Operation

MDC1200 Applicability

These desk sets support the following MDC1200 encode features:
PTT-ID used at the beginning of voice transmission to indicate to the receiving unit(s) who is
transmitting
Post PTT-ID used at the end of voice transmission to indicate to the receiving unit(s) who was
transmitting.
Call Alert used to alert mobile operators away from their radio to call the dispatch operator. Select Call used to selectively call an individual or group of mobiles. Also supports automatic select
call.
Radio Check used to allow the dispatch operator to determine if a mobile is operational or within
range.
Radio Disable used to disable an appropriately equipped mobile in the event that it is lost or stolen. Radio Enable used to enable an appropriately equipped mobile that has been disabled with a Radio
Disable command.

Entering the MDC Menu

Make sure the desk set is in normal operation. Press the MDC button. The normal status line appears at
the top of the display.
The second line displays the selected MDC1200 type and the last transmitted unit ID or alias or the unit ID or alias from the MDC message queue.

Selecting the MDC1200 Type

The available MDC1200 types are set by programming software. Use the SELECT button to cycle
forward or

Entering the Unit ID for MDC1200

LOCK + SELECT to cycle backward through the enabled types.
If the desired unit ID or alias is not currently selected, a new unit ID may be entered or a new alias selected.
To enter the unit ID to be targeted, press a numeric keypad button. Enter the digits A, B, C and D by pressing # button, or
LOCK + 1, LOCK + 2, LOCK + 3 and LOCK + 4. Enter the digits E and F by using the * button and
LOCK + 5 and LOCK + 6.
The LCD displays the unit ID as entered from right to left. As new digits are entered, the previous digits are moved one position to the left and the new digit is entered in the right-most location. If another digit is entered after all blanks are filled, the ID is cleared and the user must start over. The ID may also be cleared using the
CLEAR button. If a blank is not entered, the digit is assumed to be zero when the
transmission is initiated.

Entering a Programmed Alias

If MDC1200 aliases have been programmed into the desk set, press either the UP or DOWN button after
entering the MDC menu. To scroll alphabetically, press
LOCK + UP or LOCK + DOWN to select the alias
that begins with the next or previous letter of the alphabet.
19
Operation L3149B (C200) Advanced Tone Remote Desk Set

Sending the MDC1200 Message

When the desired unit ID or alias appears on the display, press MONITOR to ensure that the radio channel
is not in use. When the channel is free, press the
TRANSMIT button or handset PTT bar. The MDC1200
message is sent according to the table below once a channel is established.
If a channel cannot be established when using a CDM1550 LS Mobile Radio, “SYS NOT AVAIL” is displayed and the MDC message is not sent. Additional attempts can be made by pressing the
TRANSMIT
button again.
Type of Call
Group Calls and Wildcards Allowed
Acknowledgment Required
Retries
Call Alert Yes Yes, if not Group or Wildcard 4, if ACK required
Select Call Yes No 0
Radio Check No Yes 4
Radio Enable No Yes 4
Radio Disable No Yes 4

Group Calls and Wildcards

If the ID being transmitted is a group call, E001 (*001) through EEEE (****), or contains wildcard digits, F or #, no acknowledgment is required. For these types of calls, the unit transmits the message once and exits the MDC menu.
As indicated in the table above, some types of MDC1200 messages do not allow group IDs or allow wildcards. If the operator attempts to enter an ID that is not allowed, the unit may either beep indicating an invalid entry or show “*ERR” in the ID field upon pressing

Acknowledgments

TRANSMIT.
If the type of call requires an acknowledgment, the unit sends the first attempt and waits for an acknowledgment from the target unit. If an acknowledgment is not received during the wait time, the desk set attempts up to four retries displaying “RTX” in the upper right hand corner of the display and waits each time for an acknowledgment.
If an acknowledgment is received, the display shows “***ACK***” on the second line of the display and exits the MDC menu. Pressing the
CLEAR button or entering a mode that requires the use of the second
line will clear the acknowledgment message.
If no acknowledgment is received during the retries or the user exits the MDC menu manually, the display shows “***NO ACK***” on the second line of the display and exits the MDC menu. Pressing the
CLEAR button or entering a mode that requires the use of the second line clears the acknowledgment
message.
20
L3149B (C200) Advanced Tone Remote Desk Set Operation

Select Call

Select Call is a special MDC1200 type that is used to selectively signal an individual unit or a group of units. To initiate a Select Call, the operator must press and hold the
TRANSMIT button or handset PTT
bar. After the unit has transmitted the Select Call, the display shows “***TALK NOW***” on the second line of the display. The operator may then speak to the target unit. For a non-automatic Select Call, when the
TRANSMIT button or handset PTT bar is released, the unit exits the MDC menu
The unit can be programmed with the software for automatic Select Call. This mode of Select Call works the same as above with one exception. When the
TRANSMIT button or handset PTT bar is released, the
unit remains in the MDC menu to allow further Select Calls to the same unit. Once the transmission has been initiated, the operator cannot change the target ID. To exit this mode of operation, see Exiting the MDC Menu below. Additionally, if the operator desires to selectively call a different unit, the MDC menu must be exited and reentered.

Exiting the MDC Menu

If a call is acknowledged or not acknowledged, the MDC menu is automatically exited and the desk set returns to normal operation.
At any time while in the MDC menu, the operator may press the button used to enter the MDC menu to exit (i.e. the MDC button or a programmed button). If the user does this after initiating the transmission, it is considered an abort and is logged as such on the printer log. The display shows “***NO ACK***”.

RS-232/Printer Output

The RS-232 output of the desk set is used for logging received and transmitted MDC1200 messages. A description of the header that appears on the computer monitor is as follows:
I/O: indicates the direction of the message: (I) incoming or (O) outgoing.
ORIGIN: contains the unit ID of the originating device.
DESTINATION: contains the unit ID of the target device.
TIME and DATE: indicate when the message was received or transmitted.
FUNCTION: indicates the type of message encoded or decoded.
STATUS: contains additional information on the message.
21
Operation L3149B (C200) Advanced Tone Remote Desk Set
A typical printout supported by the C200 is shown below. For these examples, the desk set’s unit ID is assumed to be 5678; the target unit’s ID is assumed to be 1234. The Line column and line numbers are added for discussion below.
Line I/O ORIGIN DESTINATION TIME DATE FUNCTION STATUS
1 2 3 4 5 6 7 8
9 10 11 12 13 14 15 16 17 18
O 5678 12:52:23 AM 04-29-99 PTT ID
I 1234 5678 12:52:41 AM 04-29-99 PTT ID
O 5678 1234 12:52:52 AM 04-29-99 SEL CAL
I 1234 5678 12:53:07 AM 04-29-99 SEL CAL
O 5678 1234 12:53:24 AM 04-29-99 CAL ALT
I 1234 5678 12:53:25 AM 04-29-99 ACK CAL ALT O 5678 1234 12:54:10 AM 04-29-99 CAL ALT O 5678 1234 12:54:14 AM 04-29-99 CAL ALT RETRY O 5678 1234 12:54:18 AM 04-29-99 CAL ALT RETRY O 5678 1234 12:54:21 AM 04-29-99 CAL ALT RETRY O 5678 1234 12:54:25 AM 04-29-99 CAL ALT RETRY O 5678 1234 12:54:29 AM 04-29-99 CAL ALT FAIL
I 1234 5678 12:54:51 AM 04-29-99 CAL ALT O 5678 1234 12:54:51 AM 04-29-99 ACK CAL ALT O 5678 1234 10:55:11 AM 04-29-99 RAD CHK
I 1234 5678 10:55:12 AM 04-29-99 ACK RAD CHK O 5678 1234 10:56:06 AM 04-29-99 EMRGNCY
I 1234 5678 10:56:07 AM 04-29-99 ACK EMRGNCY
Line 1 shows an outbound or desk set-initiated PTT ID. Line 5 shows an outbound Call Alert. Line 6 shows the inbound acknowledgment for the Call Alert on line 5.
Lines 7 through 12 show an outbound Call Alert that did not receive an acknowledgment. Line 12 shows that the Call Alert failed. If during the retry sequence, the operator terminated the Call Alert, the status would show ABORT.
If an alias of “SHERIFF” is programmed for the unit ID 1234, the printout contains the alias name instead of the actual unit ID as seen below.
Line I/O ORIGIN DESTINATION TIME DATE FUNCTION STATUS
1 2
O 5678 01:00:17 AM 04-29-99 PTT ID
I SHERIFF 5678 01:00:25 AM 04-29-99 PTT ID

RS-232 Input or PC Control

The RS-232 input feature allows a computer to send information, which causes the desk set to initiate a MDC1200 message, page (without talk time), frequency change or custom tone transmission.
In order for the desk set to expect data from the RS-232 port and lock-out the desk set keyboard, a “^” (caret) and a <CR> (carriage return) must be sent to the desk set. If the desk set is not currently busy and in normal operation, it returns the ASCII string “018”. At this point, control of the desk set from the front panel is not possible; however, it is recommended that the keyboard not be used during a PC direction of the unit. After the PC has received the “018”, data may be sent to the desk set.
The functions of PC Control are described below. Note that all bytes are represented in ASCII format.
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