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GSP-1620 Modem Product Specification
80-99240-1 Rev. D 5-7
DB-25 Data and Control Port Pinouts
Table 5-1 provides detailed information about the Interface
connector pinouts.
Table 5-1.
Interface Connector Pinouts
Pin
number
Signal Name Signal
level
Direction
User <-> Modem
Description
1 Chassis Ground - Chassis Ground Isolated chassis
ground
2 DP_TXD RS-232 DTE -> DCE Data port TXD
3 DP_RXD RS-232 DTE <- DCE Data port RXD
4 DP_RTS RS-232 DTE -> DCE Data port RTS
5 DP_CTS RS-232 DTE <- DCE Data port CTS
6 DP_DSR RS-232 DTE <- DCE This pin is the DSR for
the Data port and is
asserted when the
modem detects activity
on the Data port and is
ready to communicate
with the DTE over this
port. This signal is
de-asserted when the
modem detects no
activity on the Data
port; or is de-asserted
as an acknowledgment
to the user, indicating
that the modem has
completed its power-
down sequence after
the DTR lines of all
serial ports have
de-asserted.
7 Ground Ground Ground return Ground return
8 DP_DCD RS-232 DTE <- DCE Data port DCD
9 DC_POWER 5.6V-16V Modem power
10 DC_POWER 5.6V-16V Modem power
11 Ground Ground Ground return Ground return
- Table of Contents 3
- 80-99240-1 Rev. D v 5
- 80-99240-1 Rev. D vii 7
- List of Figures 10
- List of Tables 11
- Revision History 13
- About This Specification 15
- Notational Conventions 16
- Abbreviations and Acronyms 17
- 80-99240-1 Rev. D xix 19
- Related Documentation 21
- Cautions and Warnings 21
- 1 Globalstar Overview 23
- Space Segment 24
- Ground Segment 24
- Coverage 24
- 80-99240-1 Rev. D 1-3 25
- Carriers 26
- 80-99240-1 Rev. D 1-5 27
- Globalstar Overview 28
- 1-6 80-99240-1 Rev. D 28
- 2 GSP-1620 Modem Overview 29
- GSP-1620 Modem Overview 30
- 2-2 80-99240-1 Rev. D 30
- 80-99240-1 Rev. D 2-3 31
- 80-99240-1 Rev. D 2-5 33
- Electric Utility Industry 34
- 80-99240-1 Rev. D 2-7 35
- Water Treatment Plants 36
- Remote Inventory Management 37
- Energy Management 37
- Agriculture 38
- Aviation 38
- 3 Features 39
- AT Commands 40
- Modes of Operation 40
- Short Messaging Service (SMS) 40
- SMS Alerts 41
- SMS Message Field Information 41
- Globalstar Service Alerts 42
- Service Status Message 43
- Packet Data Service 45
- Dynamic IP Addressing 47
- Fixed IP Addressing 47
- Dormant Mode Service 48
- Asynchronous Data Service 49
- Data Rate and Throughput 51
- Features 52
- 3-14 80-99240-1 Rev. D 52
- 4 AT Commands 53
- 5 Hardware Description 57
- Modem Antenna Connectors 60
- Data and Control Ports 60
- Control Port Signals 61
- Data Port Signals 62
- Table 5-1 63
- Diagnostic Port 65
- DC Power 66
- Surge Protection 67
- EMI Filtering 67
- Power Consumption 68
- Power-On 68
- Grounding 70
- Modem Antenna Specifications 72
- Antenna Dimensions and Weight 73
- Antenna Depiction 73
- Hardware Description 74
- 5-18 80-99240-1 Rev. D 74
- Antenna Cable Specifications 75
- Table 5-3 76
- 5-22 80-99240-1 Rev. D 78
- Mounting Multiple Antennas 79
- 5-24 80-99240-1 Rev. D 80
- GSP-1620 Modem Environments 81
- Thermal Radiation 82
- Altitude 83
- Vibration 83
- Mechanical Shock 85
- Acoustic Noise 85
- Environments 86
- Temperature/Humidity 87
- Icing/Freezing Rain/Snow 88
- RF Connector Durability 91
- Materials 91
- Shipping 91
- Environmental Specifications 92
- 6-12 80-99240-1 Rev. D 92
- Certification 93
- 7-2 80-99240-1 Rev. D 94
- RF Restrictions 95
- Pacemakers 97
- Hearing Aids 97
- Other Medical Devices 98
- 8 Modem Integrator’s Kit 99
- 80-99240-1 Rev. D 8-3 101
- Modem Integrator’s Kit 102
- 8-4 80-99240-1 Rev. D 102
- 9 Warranty 103
- Warranty 104
- 9-2 80-99240-1 Rev. D 104
- 10 Product Support 105
- Order Fulfillment Information 106
- 80-99240-1 Rev. D 10-3 107
- Contact information 108
- 80-99240-1 Rev. D 10-5 109
- Product Support 110
- 10-6 80-99240-1 Rev. D 110
- A Specification Summary 111
- [1] q = 0 is zenith 113
- [3] at Tsky = 200 K 113
- Specification Summary 114
- A-4 80-99240-1 Rev. D 114
- 80-99240-1 Rev. D Index-1 115
- Index-2 80-99240-1 Rev. D 116
- 80-99240-1 Rev. D Index-3 117
- 80-99240-1 Rev. D Index-5 119
- Index-6 80-99240-1 Rev. D 120
- 80-99240-1 Rev. D Index-7 121
- Index-8 80-99240-1 Rev. D 122
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