User's Manual
Table Of Contents
- Safety Precautions
- Regulatory Compliance FCC
- Manual Overview
- Introduction
- Technical Specifications
- Physical Interfaces
- Enabler II-G Mounting Reference
- Pin Orientation Reference
- Connectors
- I/O Signal Connector on the Enfora Enabler II-G Module
- Antenna
- Control Connector Signal Descriptions and Functions
- Input Power
- Ring Indicate
- Radio Power/Reset
- Serial Interface (9 Pin I/F) (See table in section 6.5.1 I/O Connector Pin Assignments)
- General Purpose Input/Output Interface (GPIO)
- Analog-To-Digital Input
- Digital-To-Analog Output
- Handset Microphone Input
- Handset Speaker Output
- Headset Microphone Input
- Headset Speaker Output
- Audio Design Note
- Subscriber Identity Module (SIM) Carrier
- Modes of Operation
- SIM Operation
- Software Interface
- Setup and Initialization
- General Setup
- HyperTerminal Configuration for Enabler II-G
- Initialization (AT Command Interface)
- Initial Response to the AT Command
- Sending an Initialization String to the Enfora Enabler II-G Module
- Setting Up the Communication Mode for the Enfora Enabler II-G Module
- Querying the Status of the Enfora Enabler II-G Module
- Setting Module Reporting Parameters for GSM and GPRS
- GSM/SMS Examples
- GPRS Packet Examples
- General Setup
- Integration and Testing
- APPENDIX A - Warranty Repair and Return Policy
- APPENDIX B - Regulations and Compliance
- GCF Approval (Formerly FTA)
- Electromagnetic Compatibility (EMC) and Safety Requirements
- EMC/Safety Requirements for the USA
- Human Exposure Compliance Statement
- Compliance with FCC Regulations
- Unintentional Radiators, Part 15
- Intentional Radiators, Part 24
- Instructions to the Original Equipment Manufacturer (OEM)
- Nationally Recognized Testing Laboratory (NRTL) Approval
- EMC/Safety Requirements for the Countries of the European Union (EU)
- EMC/Safety Requirements for Other Countries
- APPENDIX C - Glossary and Acronyms
- APPENDIX D – Tables And Figures
- APPENDIX E - Contacting Enfora
Integration Guide
Version 1.07
GSM0100PB001 Page 30 1.07 - 1/9/04
6.7.8 Handset Microphone Input
Parameter Conditions MIN TYP MAX UNIT
Maximum Input Range –
Mic(+) to Mic(-)
Inputs 3 dBm0 (Max. digital
sample amplitude when PGA
gain set to 0 dB)
32.5 mVrms
Nominal Ref. Level –
Mic(+) to Mic(-)
-10 dBm0
Differential Input Resistance –
Mic(+) to Mic(-)
100 kΩ
ΩΩ
Ω
Microphone Pre-Amplifier Gain 25.6 dB
Bias Voltage on Mic(+)
2.0 or 2.5 V
2.0 2.5 Vdc
Mic Bias Current Capability 0 0.5 mA
6.7.9 Handset Speaker Output
Parameter Conditions MIN TYP MAX UNIT
Maximum Swing –
Ear(+) to Ear(-)
R
L
= 32 Ω & 5% distortion
1.2 1.5 V
pp
Maximum Capacitive Load –
Ear(+) to Ear(-)
100 pF
Amplifier Gain 1 dB
Amplifier State in Power Down
High Z
Enfora recommends an external audio amplifier for loads of less than 16 Ω or if volume is inadequate.
6.7.10 Headset Microphone Input
Parameter Conditions MIN TYP MAX UNIT
Maximum Input Range –
Mic(+) to Mic(-)
Inputs 3 dBm0 (Max. digital
sample amplitude when PGA
gain set to 0 dB)
32.5 mVrms
Nominal Ref. Level –
Mic(+) to Mic(-)
-10 dBm0
Differential Input Resistance –
Mic(+) to Mic(-)
100 kΩ
ΩΩ
Ω
Microphone Pre-Amplifier Gain 25.6 dB
Bias Voltage on Mic(+)
2.0 or 2.5 V
2.0 2.5 Vdc
Mic Bias Current Capability 0 0.5 mA
6.7.11 Headset Speaker Output
Parameter Conditions MIN TYP MAX UNIT
Maximum Swing –
HS Spkr (+) to (-)
R
L
= 32 Ω & 5% distortion
1.6 1.96 V
pp
Maximum Capacitive Load –
HS Spkr (+) to (-)
100 pF
Amplifier Gain -7 -5 dB
Amplifier State in Power Down
High Z
The headset speaker output is a single ended output. Enfora recommends an external audio amplifier for
loads of less than 32 Ω or if volume is inadequate.