CM1481 Datasheet, PDF (2/24 Pages) ON Semiconductor – 2-Channel EMI Filter with ESD Protection for Headsets/Speakers

The CM1481 Non-Predictive Selcall Module
Table of Contents
Introduction to The CM1481
3
Summary of Standard Functions and Features
3
Installation Instructions
4
Power Requirements
4
Handling Precautions
4
Alert Audio Levels
4
Radio Interface
5
Circuit Diagram
6
PCB Layout
7
Configuration
8
Configuration Menu
10
Error and Status Messages
11
Receive Call Operation
12
Transmit Call Operation
12
LED Call Memory
12
LED Drive
12
Automatic REPEAT-Tone
13
Timed Mute Reset
13
Audio Alerts
13
PTT Lockout
13
Single or Dual Button Operation
14
Automatic Number Identification (ANI)
14
Tx Timeout and Warning
15
NOTONE Timer
15
Transponding
15
Input/Output Polarities
15
Lead-In Tone
16
Quiet/Open Modes
16
Lead-In Delay
16
Over-Air Functions
17
Power-Up 'Quiet'/'Open'
17
‘Muted’ Call Initiation
17
Security Checks
18
Example Over-Air Transactions
19
Pseudo-Random Number Information
19
Over-Air Tone Information
20
Hexadecimal Sequential Code
21
Operational Rules
21
Tone Allocations
22
International GROUP CALL
22
Non-International GROUP CALL
22
Specification
23
Ordering Information
24
2