Product specifications

Features
3-10 80-99240-1 Rev. D
Note
In the first Gateway software release that supports modems, fixed IP
addressing requires that private IP addresses be “decoded” from the
modem’s IMSI (International Mobile Subscriber Identity). This precludes
the use of fixed IP addressing with roaming between Gateways.
Virtual Private Network Service
Since a fixed IP addressing scheme requires the use of private
IP addresses, a virtual private network or VPN (e.g., IPSec)
or an IP-in-IP tunnel would have to be established between
the host and the Globalstar Gateway, so the host can initiate
IP sessions with the remote/SCADA unit.
When using dynamic IP addressing, an end-to-end VPN
connection can be established between the remote/SCADA
unit and the host/server.
Dormant Mode Service
With dormant mode service, the Globalstar system can keep
the IP session “up” at the application layer (host and SCADA
application) while dropping the air link/traffic channel, to
conserve Globalstar resources and to decrease billing time to
the user. The traffic channel is automatically reestablished
upon receipt of PPP traffic at the SCADA application end or
IP traffic at the Globalstar Gateway. The Globalstar system
then completes the transmission, with no loss of user data.
Roaming and Packet Data Service
The GSP-1620 modem is capable of both “fixed” operation in
one location (for example, a building, tank, pipeline, or well)
or “mobile” operation for applications on trucks, rail cars,
aircraft, or shipping containers.