GAI-Tronics MRTI 2000 User Manual

Pub. 43004-019C

GAI-TRONICS® CORPORATION

A HUBBELL COMPANY

PL1877A (MRTI 2000) Microprocessor

Radio Telephone Interconnect

Installation and Service Manual

GAI-Tronics Corporation 400 E. Wyomissing Ave. Mohnton, PA 19540 USA

610-777-1374  800-492-1212  Fax: [phone]

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 equi pment 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 stand ard 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, i ncidental, 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.

12/10 Publication 43004-019C ii

Table of Contents

FOREWORD...............................................................................................................................................................1

SCOPE OF MANUAL ....................................................................................................................................................2

NOMENCLATURE........................................................................................................................................................2

ORDERING REPLACEMENT PARTS ..............................................................................................................................2

SERVICE AND REPAIR.................................................................................................................................................2

SAFE HANDLING OF CMOS INTEGRAT ED CIRCUIT DEVICES ......................................................................................3

MODEL CHART...........................................................................................................................................................4

SPECIFICATIONS .........................................................................................................................................................6

DESCRIPTION............................................................................................................................................................7

GENERAL DESCRIPTION..............................................................................................................................................7

FEATURES OF THE PL1877A MICROPROCESSOR TELEPHONE INTERCONNNECT.........................................................7

INSTALLATION.........................................................................................................................................................9

FCC Interference Warnings..................................................................................................................................9

Equipment Required .............................................................................................................................................9

Cable Installation Safety Considerations .............................................................................................................9

Telephone Line Lightning and Over-voltage Protection ......................................................................................9

Rack-Mount Installation.....................................................................................................................................10

Installation Considerations.................................................................................................................................10

Electrical Interface.............................................................................................................................................10

Power Supply......................................................................................................................................................11

P1 Radio Connector............................................................................................................................................12

INTERNAL DIAGNOSTICS ..........................................................................................................................................13

Test 1 – TX Softpot Adjustment...........................................................................................................................13

Test 2 – DTMF Decode Thresholds.................................................................................................................... 13

Test 3 – Mobile-to-Phone Audio Path................................................................................................................13

Test 4 – Mobile-to-Phone Path 2........................................................................................................................14

Test 5 – Mobile-to-Phone Audio Path................................................................................................................14

Test 6 – Non-accessed Patch Functions.............................................................................................................14

Test 7 – Active Line Swap................................................................................................................................... 15

Test 8 – Network Tone Decoding........................................................................................................................15

Test 9 – HC11 DSP Communications.................................................................................................................16

Test 10 – HC11 DSP Communications...............................................................................................................16

Test 11 – TX Audio Port .....................................................................................................................................16

Test 12 – RS-232 Diagnostic ..............................................................................................................................16

Test 13 – DTMF Decode on Un-accessed Phone Line.......................................................................................16

LEVEL SETTING........................................................................................................................................................17

Transmitter Audio Level .....................................................................................................................................17

Carrier Detect Adjustments ................................................................................................................................17

Internal Noise-Operated Squelch Adjustment.....................................................................................................18

PC PROGRAMMING .............................................................................................................................................. 19

GENERAL DESCRIPTION............................................................................................................................................19

Hardware/Software Requirements......................................................................................................................19

Communication Port...........................................................................................................................................19

Connections ........................................................................................................................................................19

Installing Programming Software.......................................................................................................................19

IAPS PROGRAMMING...............................................................................................................................................20

Editing Screens...................................................................................................................................................20

INPUT/OUTPUT.........................................................................................................................................................21

Input/Output – I/O Settings.................................................................................................................................21

Serial Port Setup.................................................................................................................................................22

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Table of Contents PL1877A Microprocessor Radio Telephone Interconnect

Input/Output – I/O Settings - Read ITI6000A.....................................................................................................22

Input/Output – I/O Settings - Read Remote ........................................................................................................23

Input/Output – Remote Programming -Dialing Directory..................................................................................24

Input/Output – Read Local .................................................................................................................................24

INSTALLA T ION..........................................................................................................................................................25

Installation – Radio Interface Parameters..........................................................................................................25

Installation – Telephone Line Settings................................................................................................................27

BASIC OPERATION....................................................................................................................................................28

Basic Operation – Mode Selection .....................................................................................................................28

Basic Operation – Operational Settings.............................................................................................................30

Basic Operation – Programming Privileges.......................................................................................................31

ACCESS/RELEASE SETTI NGS.....................................................................................................................................32

Access/Release – Mobile Initiated – Mobile Access Release..............................................................................32

Access/Release – Mobile Initiated – Mobile Access Release - Security Code Overrides ...................................34

Access/Release – Mobile Initiated - Multi-Digit Prefixes...................................................................................35

Access/Release – Mobile Initiated - Multi-Digit Release Codes.........................................................................35

Access/Release – Telephone Initiated - Direct Access........................................................................................35

Access/Release – Telephone Initiated - Misc. Access/Release............................................................................37

Access/Release – Global Access/Release............................................................................................................38

SIGNALING ............................................................................................................................... ................................39

Signaling – Telephone Line Dialing – Dialing Method......................................................................................39

Signaling – Telephone Line Dialing -Autodial/Redial........................................................................................40

Signaling – Telephone Line Dialing – Auto-dial Numbers.................................................................................41

Signaling – Telephone Line Dialing – Toll Restriction ......................................................................................41

Signaling – Telephone Line Signaling Toll Restriction Prefixes ........................................................................42

Signaling – Mobile Signaling – Ring Signaling..................................................................................................42

Station Identifier.................................................................................................................................................43

PAGING .................................................................................................................................................................... 44

Paging – Telephone Line....................................................................................................................................44

Paging – Attendant Paging.................................................................................................................................45

Paging – Mobile Paging.....................................................................................................................................45

Paging – General Paging...................................................................................................................................45

Paging – Paging Format - DTMF Paging Parameters......................................................................................46

Paging – Paging Format – 1500 Paging Parameters........................................................................................46

Paging – Paging Format – 2805 Paging Parameters........................................................................................47

Paging – Paging Format Plectron Paging Parameters......................................................................................47

Paging – Paging Format – 2-Tone Paging Parameters.....................................................................................47

Paging – Paging Format – 5-Tone Paging Parameters.....................................................................................48

Paging – Paging Format – Multi-Mode Paging Table.......................................................................................49

SERVICE ADJUST......................................................................................................................................................51

Service Adjust – Service Diagnostics..................................................................................................................51

Service Adjust – Manual Off hook - Telephone Line Off hook Threshold Voltage.............................................52

Entering Programmed Parameters.....................................................................................................................52

Mobile Programming of Auto-Dial Numbers .....................................................................................................53

Wildcard Access/Release....................................................................................................................................54

Programming Wildcard Access/Release.............................................................................................................55

Wildcard Access/Release with Paging................................................................................................................56

Paging without Direct Channel Access ..............................................................................................................56

Paging with Direct Channel Access....................................................................................................................57

Programming the Wildcard Code for use with Paging.......................................................................................58

Miscellaneous Information about Wildcard Access/Release Feature.................................................................59

MULTI-DIGIT ACCESS/RELEASE............................................................................................................................... 60

Multi-Digit Access ..............................................................................................................................................60

Security Code Table............................................................................................................................................61

Multi-Digit Release.............................................................................................................................................62

OPERATOR INSTRUCTIONS ...............................................................................................................................63

MOBILE ORIGINATED CALLS ....................................................................................................................................63

Signal Search Simplex Mode ..............................................................................................................................63

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Table of Contents PL1877A Microprocessor Radio Telephone Interconnect

Enhanced VOX Simplex Mode............................................................................................................................63

Network Signaling............................................................................................................................................... 64

Half Duplex Mode...............................................................................................................................................64

LANDLINE ORIGINATED CALLS.................................................................................................................................66

Direct Access ......................................................................................................................................................66

Selective Signaling..............................................................................................................................................66

MULTI-DIGIT ACCESS/RELEASE............................................................................................................................... 67

Multi-Digit Access ..............................................................................................................................................67

Bypassing Restrictions via Multi-digit Access....................................................................................................67

Security Code (Privileged User Override Code) ................................................................................................68

Installation of the Multi-Digit Access Feature....................................................................................................69

Configuring the Security Code to Bypass Restrictions.......................................................................................71

Multi-Digit Release.............................................................................................................................................71

Linking Multi-Digit Release to Multi-Digit Access.............................................................................................72

Installation..........................................................................................................................................................72

Wildcard Access/Release Installation.................................................................................................................73

Wildcard Access/Release with Selective Signaling.............................................................................................74

Selective Signaling without Direct Channel Access............................................................................................74

Selective Signaling with Direct Channel Access.................................................................................................75

Programming the Wildcard Template for Use with Selective Signaling.............................................................75

Miscellaneous Information Regarding Wildcard Access/Release Feature.........................................................76

PARAMETER MODIFICATION PROCEDURE ................................................................................................. 77

TERMINAL PROGRAMMING FEATURE .......................................................................................................................77

Parameter Modification via RS-232...................................................................................................................77

RS-232 Operator Instructions.............................................................................................................................77

Parameter Modification via Modem...................................................................................................................78

Modem Operator Instructions.............................................................................................................................79

DTMF PROGRAMMING FEATURE.............................................................................................................................79

Operator Instructions..........................................................................................................................................79

Procedure from Landline Telephone..................................................................................................................80

Procedure from a Mobile or Portable Equipped with DTMF Pad.....................................................................81

MOBILE PROGRAM MING OF AUTO-DI AL NUMBERS ..................................................................................................82

INSTALLATION PARAMETERS....................................................................................................................................83

Radio Interface ...................................................................................................................................................83

Telephone Interface............................................................................................................................................88

Parameter Programming Methods.....................................................................................................................90

MOBILE ACCESS METHODS......................................................................................................................................91

Mobile Access Command....................................................................................................................................91

Multi-digit Access ............................................................................................................. ..................................91

Wildcard Access..................................................................................................................................................91

Triple Key Access................................................................................................................................................92

MANUAL RELEASE METHODS ..................................................................................................................................92

Mobile Originated Release.................................................................................................................................92

Telephone Originated Release............................................................................................................................93

AUTOMATIC RELEASE METHODS .............................................................................................................................93

Mobile Originated Call.......................................................................................................................................93

Telephone Originated Call .................................................................................................................................93

GENERAL CALL CHARACTERISTICS ..........................................................................................................................94

Call Timers .........................................................................................................................................................94

Semi-private Operation.......................................................................................................................................95

SELECTABLE FEATURES ...........................................................................................................................................95

Station Identification (SID or CWID).................................................................................................................95

Toll Restrictions..................................................................................................................................................97

Autodial...............................................................................................................................................................98

Redial..................................................................................................................................................................99

Direct Channel Access ........................................................................................................................................99

Mobile Security Code (Privileged User Override)............................................................................................102

Station/Repeater Enable Feature......................................................................................................................102

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Table of Contents PL1877A Microprocessor Radio Telephone Interconnect

Miscellaneous Features....................................................................................................................................103

PARAMETER/FUNCTION REFERENCE TABLE...........................................................................................................104

FEATURES..............................................................................................................................................................117

SECOND LINE OPTION............................................................................................................................................117

Answering Calls on Line 2 ................................................................................................................................117

Originating Calls on Line 2..............................................................................................................................117

SELECTIVE SIGNALING ...........................................................................................................................................118

Landline Caller.................................................................................................................................................118

Attendant...........................................................................................................................................................119

Mobile User (Mobile Revertive Signaling).......................................................................................................119

Group Calls.......................................................................................................................................................119

2-Tone Group Calls..........................................................................................................................................120

Dual Addressing ...............................................................................................................................................120

Single-Mode Selective Signaling.......................................................................................................................120

Multi-Mode Selective Signaling........................................................................................................................121

Capcode Characteristics................................................................................................................................... 121

SELECTIVE SIGNALING PARAMETERS AND FUNCTIONS...........................................................................................122

General Selective Signaling Characteristics ....................................................................................................122

Selective Signaling Method...............................................................................................................................123

Selective Signaling Types..................................................................................................................................126

PAGING...................................................................................................................................................................129

TYPES OF PAGING...................................................................................................................................................129

2-TONE PAGING .....................................................................................................................................................129

2-Tone Paging Example....................................................................................................................................129

Group Call........................................................................................................................................................130

PLECTRON PAGING.................................................................................................................................................133

Plectron Paging Example.................................................................................................................................133

5/6 TONE................................................................................................................................................................134

PL1877A – RADIO INSTALLATION...................................................................................................................137

Mitrek Consolette – PL1877A Single Simplex Mode........................................................................................137

Mitrek Consolette – Enhanced VOX Simplex Mode .........................................................................................140

MAXAR and MOXY Bases................................................................................................................................142

MAXAR 80 Bases..............................................................................................................................................145

MICOR RCB Repeater......................................................................................................................................149

FLEXAR Repeater.............................................................................................................................................151

T1600 Series Remote Interfacing......................................................................................................................153

MSF 5000 Digital Base/Repeater Stations.......................................................................................................154

MAXTRAC 300/GM300 Base Station...............................................................................................................155

THEORY OF OPERATION..................................................................................................................................157

POWER SUPPLY ......................................................................................................................................................157

MICROPROCESSOR AND DSP MODULE (MDP).......................................................................................................157

DIGITAL SIGNAL PROCESSING.................................................................................................................................158

TX AUDIO..............................................................................................................................................................158

RADIO INTERFACE..................................................................................................................................................159

LINE INTERFACE.....................................................................................................................................................160

OPTIONAL LINE 2 INTERFACE.................................................................................................................................160

MAIN CIRCUIT BOARD ......................................................................................................................................161

DEFINITIONS AND ACRONYMS.......................................................................................................................165

12/10 Publication 43004-019C vi

Foreword

User Instructions (USA)

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 th e equipment is operated in a commerci a l 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
interferen ce in which case t he user will be required to correct the interference at his own exp ense.

This equipment complies with Part 68 of the FCC rules. Located on the equipment is a label that contains, among other information, the FCC
registration number and ringer equivalence number (REN). If requested, this information must be provided to the telephone company. The REN is
used to determine the quantity of devices that may be connected to the telephone line. Excessive REN’s on the telephone line may result in the
devices not ringing in response to an incoming call. In most, but not all areas, the sum of the REN’s should not exceed five (5.0). To be certain of
the number of devices that may be connected to the line, as determined by the total REN’s contact the telephone company to determine the maximum
REN for the calling area. This equipment cannot be used on the telephone company-provided coin service. Connection to Party Line Service is
subject to State Tariffs. If this equipment causes harm to the telephone network, the telephone company will notify you in advance that temporary
discontinuance of service may be required. If advance notice isn’t practical, the telephone company will notify the customer as soon as possible.
Also, you will be advised of your right to file a complaint with the FCC if you believe it is necessary. The telephone company may make changes in
its facilities, equipment, operations, or procedures that could affect the operation of the equipment. If this happens, the telephone company will
provide advance notice in order for you to make the necessary modifications in order to maintain uninterrupted service.

If trouble is experienced with this equipment, please contact:
GAI-Tronics Corporation

400 E. Wyomissing Ave.
Mohnton, PA 19540 USA
800-492-1212 or 610-777-1374

If the trouble is causing harm to the telephone network, the telephone company may request you to remove the equipment from the network until the
problem is resolved. This equipment uses the following USOC jacks: RJ11C. It is recommended that the customer install an ac surge arr ester in the
ac outlet to which this device is connected. This is to avoid damaging the equipment caused by local lightening strikes and other electrical surges.
This equipment is Hearing-Aid Compatible (HAC). The telephone Consumer Protection Act of 1991 makes it unlawful for any person to use a
computer or other electronic device, including fax machines, to send any message unless such message clearly contains in a margin at the top or
bottom of each transmitted page or on the first page of the transmission, the date and time it is sent and an identification of the business or other
entity, or other individual sending the message and the telephone number of the sending machine or such business, other entity, or individual. (The
telephone number provided may not be a 900 number or any other number for which charges exceed local or long-distance transmission charges.)

User Instructions (Canada) CP-01, Issue 8, Part I: Section 14.1

NOTICE: The Industry Canada label identifies certified equipment. This certification means that the equipment meets certain telecommunications
network protective, operational and safety requirements as prescribed in the appropriate Terminal Equipment Technical Requirements document(s).
The Department does not guarantee the equipment will operate to the user's satisfaction. Before installing this equipment, users should ensure that it
is permissible to be connect ed to the facilities of the local telecommunications company. The equipment must also be installed using an acceptable
method of connection. The customer should be aware that compliance with the above conditions may not prevent degradation of service in some
situations. Repairs to certified equipment should be coordinated by a representative designated by the supplier. Any repairs or alterations made by
the user to this equipment, or equipment malfunctions, may give the telecommunications company cause to request the user to disconnect the
equipment. Users should ensure for their own protection that the electrical ground connections of the power utility, telephone lines and internal
metallic water pipe system, if present, are connected together. This precaution may be particularly important in rural areas.

CAUTION

Users should not attempt to make such connections themselves, but should contact the appropriate electric inspection authority, or electrician, as
appropriate.

CP-01, Issue 8, Part I: Section 14.2

NOTICE: The Ringer Equivalence Number (REN) assigned to each terminal device provides an indication of the maximum number of terminals

allowed to be connected to a telephone interface. The termination on an interface may consist of any combination of devices subject only to the
requirement that the sum of the Ringer Equivalence Numbers of all the devices does not exceed 5.

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Foreword PL1877A Microprocessor Radio Telephone Interconnect

Scope of Manual

This manual offers descriptive data and service information for the PL1877A Microprocessor Radio
Telephone Interconnect. 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.

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

12/10 2

PL1877A Microprocessor Radio Telephone Interconnect Foreword

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) that 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.

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Foreword PL1877A Microprocessor Radio Telephone Interconnect

Model Chart

Model Description

PL1877A PL1877A Microprocessor Radio Telephone Interconnect

The following options are included in your PL1877A:

Options Description

E375 Enhanced VOX
E380 Basic Selective Signaling (provides 2-Tone)
Z394 Selective Signaling Package One (provides DTMF and Plectron)
Z395 Selective Signaling Package Two (provides 5/6 Tone and 2805/1500)

12/10 4

PL1877A Microprocessor Radio Telephone Interconnect Foreword

The following field installation kits and accessories are available for the PL1877A:

Kit Description

XAC0005A Rack-Mount Kit
40419-008 110 V Power Supply (required if not powered by connected radio)
40420-001 European-style Power Adapter
M2000-MSF5000-CBL MSF5000 Cable
M2000-MAX-CBL MaxTrac/GM300 Cable
51018-0006 MTR2000 Cable
M2000-QUANT-CBL Quantar/Quantro Cable
M2000-DIU-CBL ASTRO/DIU Cable
XAC4000A Programming Bundle CD
XAC0004A Programming Cable

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Foreword PL1877A Microprocessor Radio Telephone Interconnect

Specifications

General

Input voltage......................................................................................................................... +10.5–16 V dc,

or optional 115 V ac, 60 Hz; 220 V ac 50/60 Hz;

Input current...................................................................................................................... Less than 750 mA

RFI protection.................................................................................................................................... Built-in

Hum and noise........................................................................................... −45 dB from 1,000 Hz reference

Audio Distortion............................................................... 1% maximum with reference to a 1,000 Hz tone

(−10 dBm input, phone to transmitter path)
(0.45 V ac input, low level receiver speaker input to phone path)

Circuit loading to TX audio...................................................................... Bridging impedance (ac-coupled)

Output level to radio transmitter......................................................... 15 mV

to 0.5 V

RMS

Output level to phone line............................................. −9 dBm maximum (time averaged over 3 seconds)

Input level from phone line.............................................................................................. +5 dBm maximum

autolevel threshold: −35 dBm, +3 dB

Phone line busy detect threshold ................................................................................................−20 V, +

(or 10 V, +

2 V with 24 V threshold user selectable)

Phone line ring detect ......................................................................... Adjustable from 20 V

Ringer equivalence ............................................................................................................ 0.0B (ac)/4.9 (dc)

into 600 ohms

RMS

to 50 V

RMS

2 V

RMS

Input Audio Level from Receiv er

High level discriminator/detector.................................................................................... 0.45 V

Low level discriminator/detector........................................................................................ 80 mV

High level flat audio .................................................................................................. 2.5 V

RMS

Low level flat audio............................................................................................................ 0.45 V

+8 dBm

RMS

+8 dB

RMS

+6 to -8 dBm

+8 dB

RMS

Impedance.............................................................. 600 ohms or high impedance bridging (user selectable)

Audio Frequency Response

RX to land-line.......................................................................................................... 360 to 3,000 Hz, +3 dB

Land-line to transmitter ............................................................................................ 300 to 3,000 Hz, +

3 dB
(−45 dBm input, phone-to-transmitter path 45 mV ac input,
low level flat input to phone line path, auto-level disabled)

Logic Level Inputs

Input impedance.............................................................................................................................. 90k ohms

(inputs pulled up through 100K ohms to power input voltage)

Maximum low level input..................................................................................................................... 1.5 V

Maximum high level input.................................................................................................................... 3.5 V

Maximum high level............................................................................................................................ 100 V

Physical

Temperature range.................................................................................................................. 0º C to +60º C

Humidity.............................................................................................. <95% at relative humidity at +50º C

Dimensions ..................................................................................................... 7.0 W × 8.3 D × 1.5 H inches

Weight......................................................................................................................................... 26.9 ounces

12/10 6

Description

General Description

The PL1877A Radio Telephone Interconnect is a highly advanced DSP-based tool to connect to a public
telephone network. It can be used with a repeater or base station for initiating calls (with properly
equipped portables and mobiles) and/or receiving landline-initiated calls. With the telephone
interconnect, your wireless users can keep in contact with landline phone users.

The PL1877A provides a vast array of standard features that are optional with most telephone
interconnects. Features such as triple key access, number restricts, timers, speed dial, enhanced VOX,
built-in paging and more, mean easy operation, control of land-line communications, and user efficiency.
Because of its programmable features, the PL1877A can be used in most user environments and radio
systems.

Front Panel View of the PL1877A

Features of the PL1877A Microprocessor Telephone Interconnnect

• Flash signal (*#*) – Allows the mobile user to regain an in-house dial tone without releasing and

reaccessing the patch (call transfer, etc.). (Applicable on certain PBX equipment)

• Programmable Connect command – The command sequence required for connection to the patch

can be determined by parameter selection.

• Enhanced VOX mode allows the PL1877A to operate on control station and base station that

require VOX operation. In this mode, the PL1877A keys the radio on the presence of audio on the
telephone line. The telephone audio is delayed while the radio system is establishing the channel to
avoid clipping of syllables.

• Selective Signaling (Paging) – The PL1877A is equipped with the capability for analog paging.

Supported paging formats are 2-Tone, DTMF, Plectron, CTCSS\CDCSS, 2805, 1500, 5-Tone, and
custom 2-Tone.

• Last number redial – The last number dialed may be redialed by entering the command sequence

**. This feature may also be disabled by parameter selection.

• Over-beep – A beep is sounded when the mobile carrier is lost. This feature may be enabled or

disabled by parameter selection.

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Description PL1877A Microprocessor Radio Telephone Interconnect

• Time out warning – If the line has been inactive for a certain period of time (a period to be set by

parameter selection), the unit sends ticks prior to disconnection to alert the user. These ticks can be
enabled or disabled.

• Mobile call origination restrictions – Calls originating from mobile sources can be permitted,

prohibited, or restricted to specific features.

• Mobile signaling – Ring signaling to mobiles may be sent to begin on any of the first 9 rings.

Setting the patch to delay mobile ring signaling by a certain number of rings allows an attendant to
answer the call on a line sharing telephone set before mobiles are alerted.

• Mobile inactivity control – If, after a conversation, the interconnect determines the mobile has been

inactive for a set period of time and the # release code has not been sent, the line releases
automatically. The inactivity time is set by parameter programming.

• Telephone line origination restrictions – Calls originating from the switched network (telephone

lines) can be permitted or prohibited.

• Toll (long distance) restriction – The PL1877A disconnects when 1, 0, 9, or any of various prefixes

(as programmed) is entered as the first digit(s) of the telephone number.

• Programmable telephone line dialing method – Either Touch Codes or dial pulses can be sent to

the land-line.

• Attendant control – An attendant (telephone sharing the same telephone line with the PL1877A)

can initiate or forward calls to the mobile users via a Touch-Code equipped, line-sharing telephone
set by dialing the attendant access code.

• Patch telephone line busy signal – When a mobile user attempts to access the patch telephone line

and the line is off-hook (in use by a line-sharing telephone set, etc.), the unit returns a busy signal to
the mobile user. The line may be accessed in this condition by the busy override code.

• CTCSS Control – The TX CTCSS disable relay can be programmed to operate on command only,

or automatically on access. This allows use of the patch without disturbing other mobile users in the
system. If the relay has been activated, (disabling CTCSS), the CTCSS may be commanded back on
in order to involve another mobile user in the telephone conversation.

• Parallel telephone line capability – The interconnect can share a telephone line with a standard

telephone set. This eliminates the need for a separate telephone line dedicated to the patch.

• Direct Access (Direct Air) – Allows the telephone line callers to be placed on the air immediately

after mobile signaling on telephone line originated calls.

• Overall Access Time Limit – The duration of access to the patch is set by parameter control.

• Automatic Station Identifier (CWID) – The patch can be configured to automatically send Morse

Code station identification information at selected intervals. The choices for these intervals are: 0–
59 minutes (periodic SID), at the end of every interconnect, or both.

• Autodial – The PL1887A can have up to 25 speed dial numbers programmed into it.

• Triple Key Access – This feature allows mobiles and portables without DTMF-equipped keypads to

answer incoming calls.

• PC Programmable – All of the PL1877A’s operating parameters can be programmed using IAPS

Software. This makes installing and setting up the PL1877A easy.

12/10 8

Installation

Typical PL1877A Installation

The PL1877A can be placed on any flat level surface (desk top) that provides the operator with full
visibility of all front panel controls and indicators. It can also be rack mounted using the optional rack­mount kit.

FCC Interference Warnings

The FCC requires that manuals pertaining to Class A and Class B computing devices contain warnings
about possible interference with local and residential radio and TV reception. Please read these warnings
and all safety information in the Foreword section of this manual.

Equipment Required

•

RF service monitor • XAC0004A Programming Cable

•

Radio interface cable • PC with Windows95 or higher

•

AC voltmeter with dB ranges for measuring
audio levels

•

#1 Phillips screwdriver • 1/8-inch flat blade screwdriver

Cable Installation Safety Considerations

IAPS Programming Software, included on

•

XAC4000A Programming Bundle CD

Interconnecting, communications, and Class 2 dc power cables should be separated from electrical light
or other Class 1 circuits by at least 2 inches. The exception is where Class 1 wiring or power circuits are
run in a raceway, or are metal-sheathed or metal-clad, or are permanently separated from the conductors
of the other circuitry by a continuous and firmly fixed nonconductor such as porcelain tubes or flexible
tubing in addition to the insulation on the wire. Communications cables and in-building wiring should be
listed and marked for the purpose according to NEC Article 800.

Telephone Line Lightning and Over-voltage Protection

The PL1877A has an over-current phone line fuse that protects against occasional extreme fault
conditions that may get past the primary protectors. An example of such a fault condition is a power line
cross. For maximum surge and lightning protection, building primary (over-voltage) protectors should be
installed at the point where the telephone lines enter the radio equipment building. Primary protectors
are usually required by local codes and should be provided by your leased line provider.

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Installation PL1877A Microprocessor Radio Telephone Interconnect

Rack-Mount Installation

The optional Model XAC0005A Rack-Mount Kit for the PL1877A is available from GAI-Tronics. It
includes a 19-inch rack-mounting bracket and other parts that can be used to mount one or two PL1877A
units (or tone/dc adapter) into a standard 19-inch rack. The kit includes hardware and complete
mounting instructions.

Installation Considerations

The electrical hook-up of the PL1877A requires these basic connections: the ground wire, radio interface
cable, and the power supply cable.

WARNING

Voltages hazardous to life may be present at the exposed control line terminals under certain conditions
during the following procedures. These voltages are also present on some component leads. Care should
be taken to avoid shock during installation.

Electrical Interface

All of the electrical connections to the PL1877A are made at the rear panel. Power to the console is
furnished through a 5-pin, DIN connector. The figure below shows the rear view of the PL1877A and
the locations of the various connectors.

View of the PL1877A Back Panel with Connectors

DC Power Connector Pin Chart

Pin No. Wire Color Description

3 and 5 Red (+)
1 and 4 Black (-)

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PL1877A Microprocessor Radio Telephone Interconnect Installation

Ground Cable

The PL1877A is designed with a high degree of protection against electro-static discharge (ESD), power
line surges and telephone line surges. The protection circuitry is designed to shunt the transient current
to earth ground through the GND terminal, located on the back panel of the unit. This terminal must be
connected to a high quality earth ground in order to obtain maximum protection. All equipment at a site
should be bonded frame-to-frame with adequately sized conductor.

N

OTE: This ground should be connected through a utility entrance ground cable and the telephone

entrance ground cable, if different from the utility ground. Lightning is essentially RF, and as such does
not like long leads or sharp bends. Make connections appropriately.

Power Supply

An optional ac power supply (XAC0001A) is available from GAI-Tronics, if power is not available from
the radio. The Model 3308-00750-10 Power Supply is designed for use with 220 V ac applications.

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Installation PL1877A Microprocessor Radio Telephone Interconnect

P1 Radio Connector

The 16-pin radio connector (P1) pin designations are shown below. Refer to the applicable section of
this manual for your specific radio for more detailed information on its installation.

Radio Connector Pinout

P1 Radio Connector Pin Chart

Pin No. Wire Color Function

1 Red/Black PL Strip
2 Red PL Strip Return
3 Orange Monitor
4 Orange/Black Monitor Return
5 White PTT
6 Green PTT Sense
7 White/Black Data TX (TPL and DPL signal output)
8 Blue White TX Audio

9 Blue/Black TX Audio Return
10 Green/White RX Audio Return
11 Green/Black RX Audio
12 Black PL Detect
13 Blue Carrier Detect
14 Black/White Optional Input #1
15 Red/White Patch Inhibit
16 Not connected Optional Input #2

The PL1877A has been designed with several diagnostic tests to assist you in set-up and troubleshooting.
Entry into the diagnostic mode is made by simultaneously pressing the

UP and DOWN buttons.

To step to another test once the diagnostic mode has been entered, press the
exit, press both the

UP and PATCH ON/OFF buttons simultaneously.

PATCH ON/OFF button. To

Each time a new test is selected, a test timer is set to 15 minutes. If this timer reaches zero, the patch
resets itself to idle, ready for normal operation.

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PL1877A Microprocessor Radio Telephone Interconnect Installation

Internal Diagnostics

Test 1 – TX Softpot Adjustment

This test activates both the PTT and the PL strip output, accesses the phone line and generates 1000 Hz
to the phone line and transmitter. The
increases the TX level and

DOWN decreases the level. As the UP or DOWN button is pressed the value

stored in gain stage U18 is displayed via the LEDs in binary form. When the
pressed to exit Test 1, the TX softpot is set at the indicated TX level number. The TX softpot remains at
this value permanently unless it is again changed through Test 1.

Test 2 – DTMF Decode Thresholds

Test 2 accesses the phone line and generates each of the 16 DTMF digits. The tones are generated at six
different levels. The PL1877A decodes its own DTMF, and the decoded digits are indicated on the five
least significant LEDs in binary form. Refer to the LED assignment diagram below. The most
significant LED indicates that the digit being generated has been decoded.

UP or DOWN buttons are used to adjust the TX softpot, UP

PATCH ON/OFF button is

Digit cycling may be slowed down by pressing the
button a second time. Pressing the

N

OTE: A DTMF “0” is displayed as hexadecimal 10 (decimal 16) in binary.

Test 3 – Mobile-to-Phone Audio Path

UP button speeds up the cycling process.

DOWN button once or frozen by pressing the DOWN

This test accesses the phone line and routes mobile audio to the phone lines with autoleveling. Decoded
DTMF from the mobile is displayed via the 5 least significant LEDs in binary format. 15 dB of RX
audio attenuation may be toggled

ON or OFF by pressing the UP button. When test 3 is entered, the

attenuator is in the state required by parameter 2.

Pressing the DOWN button toggles the state of the RX audio 6 dB per octave de-emphasis. When Test 3
is entered, the de-emphasis is in the state required by parameter 1. The three most significant LEDs
(refer to the LED assignment diagram above) are used to indicate the state of the following:

• Carrier Detect Input - LED 1 (bit 7)

• RX VOX - LED 2 (bit 6)

• Internal Squelch Detection - LED 3 (bit 5)

If the LED is lit, the input is active, if the LED is not lit the input is inactive.

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Installation PL1877A Microprocessor Radio Telephone Interconnect

Test 4 – Mobile-to-Phone Path 2

Test 4 is identical to Test 3 with the following exceptions. Test 4 activates the monitor output and
disables RX autoleveling. The LEDs (refer to the LED assignment diagram on page 13) display the
status of the following:

• PTT Sense Input - LED 1 (bit 7)

• PL Detect Input - LED 2 (bit 6)

• Auxiliary Carrier Detect - LED 3 (bit 5)

The 5 least significant LEDs are used to display decoded DTMF digits.

Test 5 – Mobile-to-Phone Audio Path

PTT is activated and phone audio is autoleveled and routed to the transmitter. If enhanced VOX option
is present, enhanced VOX operation is used, otherwise autoleveling is used. The UP button is used to
toggle phone line autoleveling ON or OFF. The 5 least significant LEDs (refer to the LED assignment
diagram on page 13) display a binary representation of DTMF decoded from the phone line. The most
significant LED indicates the status of phone line VOX, if the enhanced VOX option is present.

N

OTE: A DTMF “0” is displayed as hexadecimal 10 (decimal 16) in binary.

Test 6 – Non-accessed Patch Functions

The non-accessed phone line status, is represented by the LEDs. The signals displayed are:

• Off Hook Status of an Attendant Phone

• Ring Voltage

• Phone Line Current Polarity (positive, negative, none)

• Ring Threshold Setting

Refer LED assignment diagram for Test 6 below.

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PL1877A Microprocessor Radio Telephone Interconnect Installation

Off Hook Status of an Attendant Phone - If the LED is lit, the attendant phone is off-hook. If the LED
is not lit the attendant phone is on-hook.

Ring Voltage - If the LED is flashing, ringing is present, if the LED is not lit the phone line is idle.
Phone Line Current Polarity - If the Negative Polarity Indicator is lit, the current is negative. If the

Positive Polarity Indicator is lit, the current is positive. If neither indicator is lit, no current is being
detected.

Ring Threshold Setting - Pressing the UP button increments the ring threshold setting (to a maximum of

7). Pressing the DOWN button decrements the ring threshold setting (to a minimum of 0).

Off-hook Voltage Threshold Adjustment

If parameter 163 is set to 2, you can manually adjust the PL1877A’s off-hook voltage threshold from ±48
V to ±6 V through Test 6. To accomplish this, press the
simultaneously while the PL1877A is in Test 6. The

DOWN and PATCH ON/OFF buttons

PWR LED should begin flashing, indicating that the

PL1877A has entered the off-hook adjustment. The remaining LEDs display a binary representation of
the voltage currently on the phone line (maximum displayed voltage = 51 V).

1. Disconnect the PL1877A from the phone line.

2. Set an external dc power supply to the maximum voltage that the PL1877A should recognize as off-

hook.

3. Connect this voltage across the PL1877A’s TIP and RING (P404 pins 2, 3).

4. Press the

DOWN and PATCH ON/OFF buttons simultaneously. The PL1877A samples the voltage

and stores it as the new off-hook threshold, and then returns to the normal operation of Test 6.

To abandon the off-hook adjustment without changing the current threshold, press the

ON/OFF buttons simultaneously while the PWR LED is flashing. The new off-hook threshold does not

UP and PATCH

change unless the value of parameter 163 is changed or the threshold is again modified through Test 6.

Test 7 – Active Line Swap

If the PL1877A is equipped with the second line option, the phone line used for all other tests may be
selected by pressing the

UP button. A DTMF “#” is routed out the active phone line. The least two

significant LEDs (refer to the LED assignment diagram on page 13) give a binary indication of the phone
line selected.

Test 8 – Network Tone Decoding

This test accesses the phone line and the three most significant LEDs (refer to the LED assignment
diagram on page 13) indicate the detection of:

• Dial Tone - When dial tone is detected, LED 1 (the most significant LED, bit 7) lights.

• Busy Tone - When busy tone is detected, LED 3 lights.

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Installation PL1877A Microprocessor Radio Telephone Interconnect

Test 9 – HC11 DSP Communications

In this test, the HC11 and DSP communication paths are checked. The LEDs should display (in binary)
the value 0–253. A binary 255 or 254 indicates an error has occurred.

Test 10 – HC11 DSP Communications

In this test, each radio input is assigned a corresponding LED to indicate its state (active or inactive). If
the LED is lit, the input is active, if the LED is not lit the input is inactive. Beginning with the least
significant LED, the LEDs represent:

• PTT Sense Input (P1 pin 6)

• Carrier Detect Input (P1 pin 13)

• PL Detect Input (P1 pin 12)

• Patch Inhibit Input (P1 pin 15)

• Squelch Detect (Reduction of RX white noise)

• General Purpose Input 1 (P1 pin 7)

• General Purpose Input 2 (P1 pin 16)

• General Purpose Input 3 (P1 pin 14)

Test 11 – TX Audio Port

In this test the circuitry associated with TPL and DPL paging is checked. Upon entry into this test, the
PL1877A generates 1800 Hz at the parameter selected. Pressing the

UP button increments the output

level of the TPL or DPL signal. It also causes the new level to be saved to EEPROM.
Pressing the

DOWN button decrements the output level of the TPL or DPL signal. It also causes the new

level to be saved to EEPROM.
Pressing the

UP and DOWN buttons simultaneously switches from MDC (not applicable) to TPL to DPL

signal generation. The output level associated with the newly selected signaling type is written to the
circuitry. The most significant LEDs display binary 2 for TPL paging and binary 3 for DPL paging.

Pressing

DOWN and PATCH ON/OFF while in TPL paging advances to the next TPL tone frequency.

Pressing this button combination while in DPL paging will have no effect.

Test 12 – RS-232 Diagnostic

This test requires that the TX and RX pins on the RS-232 port be shorted. In this test the PL1877A
transmits alternating patterns of 1’s and 0’s and expects to receive the exact same patterns. If the pattern
received matches the pattern sent, the four most significant LEDs will light. If the pattern does not
match, the LEDs remain unlit. The four least significant LEDs display the test number during this test.

Test 13 – DTMF Decode on Un-accessed Phone Line

During this test, phone DTMF is decoded and displayed in the five least significant LEDs (0 is displayed
as 0x10). The phone line is not accessed during this test.

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PL1877A Microprocessor Radio Telephone Interconnect Installation

Level Setting

A service monitor or communications system analyzer is required for level setting adjustments. Connect
the radio’s antenna connector to the communications analyzer and a 50-ohm load. Set the equipment to
monitor deviation at the radio’s transmit frequency.

It is necessary to enter the diagnostic test mode for some of the level setting. To enter diagnostic mode,
press both the UP and DOWN buttons simultaneously. To step to another test once the diagnostic mode
has been entered, press the
buttons simultaneously. (For more information on diagnostic test mode refer to the Internal Diagnostic
section in this manual.)

Transmitter Audio Level

The following procedure is for setting and measuring transmitter modulator/IDC circuit performance and
overall quality of the landline to mobile audio.

Before proceeding, disable the Private Line encoder output of the transmitter, if used. This may involve
removing the PL code plug in older model radios. For newer model radios, select a carrier squelch mode,
if available, or temporarily program the station to generate carrier only without PL/DPL. If the PL
STRIP function has been properly wired to the station, it is not necessary to perform the above mentioned
procedure. Simply verify that the transmitter is not sending PL/DPL while testing.

PATCH ON/OFF button. To exit, press both the UP and PATCH ON/OFF

Enter diagnostic Test 1 by pressing both the

UP and DOWN buttons simultaneously. This procedure also

activates PTT, and generates a 1000 Hz tone to the transmitter.

If the PL STRIP function has been wired to the station, the transmitter should key and cause the station to
transmit without generating Private Line codes. Adjustment of the transmit level should be made by
pressing the

UP or DOWN buttons as needed to produce 60% system deviation. Adjust the level to

produce 3 kHz deviation, as indicated by the deviation monitor, for standard 5 kHz deviation radios. For
split channel, narrow-band radios, set the level to produce 1.5 kHz deviation.

After the desired deviation level has been achieved, press the

PATCH ON/OFF button. The value set

remains stored in memory unless it is again changed through an adjustment in Test 1. Exit the test by
pressing the

Carrier Detect Adjustments

Logic Carrier Detect

UP and PATCH ON/OFF buttons simultaneously.

If using the logic carrier detect input, (most recent radios models use this mode) the parameters must be
set as follows:

1 = 1 (RX audio is post de-emphasis, or speaker (muted) source.)
2 = 1 or 0 (Set to match the available level from receiver, refer to Receiver Input Audio Level.
3 = 1 (External logic level carrier detect.)
4 = 1 or 0 (Must be set to match the logic polarity available from the radio. Consult the radio manual or

programming software to determine the polarity of the logic carrier detect output.)

Other parameters must be set as the system requires. Verify the proper selection of RX audio source
from the radio. Some radios, such as the GM300 and MaxTrac Series radios require the positioning of an
internal jumper to select muted, post de-emphasized audio. (JU551 in the “B” position in these models.)
Refer to the radio’s technical manual for information on internal jumpers.

Enter diagnostic Test 3 by pressing both the

ON/OFF button until Test 3 is reached.

UP and DOWN buttons simultaneously. Press the PATCH

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Installation PL1877A Microprocessor Radio Telephone Interconnect

While in Diagnostic Test 3, ensure that the Carrier Detect Input LED (marked PWR for this test) goes on
and off at the desired RF threshold levels (generally 10 to 12 dB sinad). The actual squelch sensitivity is
determined by the radio in this case. Any adjustments to squelch sensitivity must be made with the radio.
When complete, exit the Diagnostic Test Mode by pressing the

UP and PATCH ON/OFF buttons

simultaneously.

Internal Noise-Operated Squelch Adjustment

This procedure applies only if using the PL1877A internal noise-operated carrier detect. Its use requires
that receive audio is taken from the discriminator or detector prior to any high-frequency filtering. The
primary use for this method is Signal Search Simplex, where its use is required. Refer also to page 83 of
this manual for the Signal Search Simplex mode. Ensure that these basic parameters are set as follows:

1 = 0 (RX audio source has been pre-emphasized.)
2 = 1 or 0 (Set to match available detector level, refer to Receiver Input Audio Level)
3 = 0 (Internal carrier detect.)
5 = 0 (Internal squelch selected.)

With the PL1877A in the idle state, with no RF signal applied, observe the
VR201 marked

SQL with a small screwdriver until the LED extinguishes. (This adjustment is accessible

BUSY LED. Adjust control

on the rear of the PL1877A housing.) Then, from the communications service monitor, generate a signal
on the receive frequency, and verify that the LED lights at 10 to 12 dB sinad. Readjust the control as
needed to obtain the desired level of squelch sensitivity. Finally, ensure that the LED extinguishes when
the RF signal is removed.

12/10 18

PC Programming

General Description

The IAPS Software, included on No. XAC4000A Programming Bundle CD, is needed to program the
features of your equipment. It allows entry of programming data into your personal computer for transfer
to your equipment. The programmed data can be retrieved and edited, and printed in hard copy form for
record-keeping.

Hardware/Software Requirements

This software is for use on PCs with Windows 95 or higher operating system (not compatible with
Vista). The computer should have 8 Mb of memory, VGA or higher, with one serial port. Use 800 × 600
or higher resolution to optimize viewing.

Communication Port

Data is transferred via a serial communication port on the computer. The port must be RS-232
compatible, and either COM1, 2, 3 or 4 port on the computer can be used.

Connections

The PL1877A must be connected to your personal computer with the 25-pin D-connector cable (Part No.
XAC0004A) before the programming software can be used. Connect the cable to the COM 1, 2, 3 or 4
connector on the computer. Connect the other end to the programming jack on the PL1877A.

Installing Programming Software

Start the Windows program and make sure that all other applications are closed.

• Insert XAC4000A Programming Bundle CD (will auto-run).

• On initial set-up screen, select IAPS Programming Software and click Install.

• Follow the prompts to install.

Proper installation will create an appropriate icon on the PC’s desktop.

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PC Programming PL1877A Microprocessor Radio Telephone Interconnect

IAPS Programming

To start the IAPS program, click on the IAPS Icon. This screen appears:

Editing Screens

The status bar on the bottom of the window gives instructions for setting parameters. Editing some
parameters depends on the state of another parameter. Most screens have “tabs” for selecting each set of
parameters.

• Select tabs by clicking on the tab key.

• To select Next Page, press CTRL, TAB

• To select Previous Page, press CTRL, SHIFT, TAB

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PL1877A Microprocessor Radio Telephone Interconnect PC Programming

Input/Output

Input/Output – I/O Settings

When the main menu screen appears, click on Input/Output. This screen appears:

Click on the I/O Settings.

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PC Programming PL1877A Microprocessor Radio Telephone Interconnect

Serial Port Setup

The PL1877A can be programmed from the Local Port or the Remote Port. This parameter must be
entered to begin programming.

• If the PL1877A is installed in the same location as the computer used to program it, the serial port

selected should be Local. Refer to Input/Output - I/O Settings - Local Reading on page 24.

• If the PL1877A is located at a remote location, a modem must be installed at the correct serial port.

Select Modem Port. See the Modem Installation manual for complete information.

Make sure your COMM ports are connected properly.

Input/Output – I/O Settings - Read ITI6000A

• After the correct COMM port is selected, click on the Read ITI6000 tab.

OTE: Once Read ITI6000 begins, you will not be able to close or switch from this window until the

N

read either finishes or fails unless you click on Cancel.

• Select Read Remote for a remote (modem) installation.

• Select Read Local for a Local installation. Programming information about Read Local follows the

Remote (modem) programming information on page 24.

When the progress bar reaches 100%, click on OK. The expanded main menu is now available that
allows you to complete your IAPS programming.

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PL1877A Microprocessor Radio Telephone Interconnect PC Programming

Input/Output – I/O Settings - Read Remote

For Remote Programming, it is recommended that you have a telephone connected to the modem, or a
modem with a speaker to monitor the connection process.

Call Waiting

If a modem is used, and the phone line being used has a Call Waiting feature, this feature must be
disabled in the IAPS programming.

• To disable call waiting, enter *70. Although this is the standard Disable Call Waiting code, some

local phone companies may use a different code. To verify *70 as the correct code, dial it on a phone
connected to the phone line you will be calling from.

• A beep signifies it is the correct code.

• A busy signal means the code does not work. Check your phone book or call your local telephone

company for information,

Paging

If the Paging option is enabled, these parameters must be set:

• Click on Access/Release under the main menu and select Telephone Init. Enable Require * from

Telephone User for Direct Access for Line 1 and Line 2.

• Click on Basic Operational Settings and select Programming Privileges.

Enter the prefix to *#0 Telephone Line Programming Code - (Enter a code here if you want only
those with an access code to be able to access the PL1877A parameters remotely. This code number
must be entered as the Telephone Line Dialing Prefix, or the connection attempt will fail.)

After Call Waiting and Paging options have been programmed go to the Input/Output on the Main Menu.

Select Program, then click on Program Remote. The Dialing Screen appears. Select the desired
dialing method.

If you want the computer to dial the PL1877A Interconnect phone number, select Enter Number. Type
the PL1877A Interconnect telephone number at the Enter Number prompt. If applicable, enter the land­line access code.

If the PL1877A has a Remote Access Code, enter that number in the Land-Line Dialing Prefix field.
Click on Dial. After the modem dials the number, listen for the remote PL1877A to answer. If using a
telephone connected to the modem, pick up the telephone receiver and listen for the remote PL1877A to
answer.

If dialing from a telephone connected to the modem, click on Manual Dialing, pick up the telephone, and
dial the number of the remote PL1877A. Click on OK when the PL1877A connects, and then hang up.
To ensure your parameters are saved after your programming session, make sure the Auto Archive box is
checked.

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PC Programming PL1877A Microprocessor Radio Telephone Interconnect

Input/Output – Remote Programming -Dialing Directory

If there are multiple PL1877A installations, you have the option of storing up to 10 names, phone
numbers and Telephone Line Access prefixes in the Dialing Directory. These can be selected and dialed
directly from the screen entries.

To store entries in the directory, enter up to 16 digits/symbols. Valid entries are:

0-9, A-F, *, # Standard DTMF digits

-, () Dash, open and close parenthesis
, (comma) 2-second pause
@ 1 or more rings, then wait 5 seconds
! Flash hook
0-9, A-D

Telephone line dialing prefix
(6-digit access code allowing remote access to PL1877A)

When Remote Programming is completed, select Program Remote and click on OK after the progress bar
reaches 100%.

N

OTE: If the IAPS only programs a partial program (because the user canceled or it failed before the

program was completed), default parameters are reloaded.

Input/Output – Read Local

After selecting the Read ITI6000A tab, click on Read Local. The LEDs on the front of the PL1877A
strobe, and then the

PWR and BUSY LEDs remain illuminated. Click on OK after the progress bar

reaches 100%.

After the Read ITI6000A tab menu has been completed, you are now ready to continue programming the
necessary parameters.

12/10 24