Product specifications

80-99240-1 Rev. D 3-1
3 Features
This chapter discusses key features of the GSP-1620 modem,
including the following:
• General modem features
• Packet/asynchronous data overview
• Packet data service
• Asynchronous data service
General Modem Features
The general features discussed in this section work with
either packet data or asynchronous data. For packet-specific
features, see Packet Data Service on page 3-7. For
asynchronous-specific features, see Asynchronous Data
Service on page 3-11.
Globalstar Satellite Service
The QUALCOMM Globalstar GSP-1620 Satellite Data
Modem offers full duplex (FDX) transmit and receive
capabilities at 9600 bps via the Globalstar satellite
constellation, and uses QUALCOMM’s CDMA digital
technology for reliability.
The Globalstar Air Interface (GAI) is based on a modified
(proprietary) IS-95A standard adapted for Mobile Satellite
System (MSS) operations:
• Forward Link (Modem Receive): 2484.39 to 2499.15 MHz
• Reverse Link (Modem Transmit): 1610.73 to 1625.49
MHz