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Developing Modem Applications
80-99208-1 Rev. D 5-27
Mobile-Originated Packet Data Calls
The GSP-1620 modem lets the application device (DTE)
connected to the modem originate a packet data call.
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Steps
TO MAKE A MOBILE-ORIGINATED PACKET DATA CALL
■ Use the ATD#777 command.
The modem returns
CONNECT if the call has been
established (for other result codes, see Dial (D) on page
6-20).
For another example, see Making a Call from the Data Port
on page 4-4.
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Steps
TO HANG UP A PACKET DATA CALL
1. Enter Online-Command mode by using the in-band
control data escape sequence, “
+++” surrounded by guard
time (for details, see Change from Online to
Online-Command Mode (+++) on page 6-40).
2. Use the
ATH command (to hang up and end dormant
mode).
or
Use the
ATH777 command (to hang up but leave dormant
mode active).
Mobile-Terminated Packet Data Calls
The GSP-1620 modem lets the application device (DTE)
connected to the modem receive a packet data call. It is the
responsibility of the DTE application to keep the modem
powered up if it is to receive incoming packet data calls.
However, the first Gateway software release that supports
GSP-1620 modems does not support over-the-air
mobile-terminated calls. Future releases of the Gateway
software will support mobile-terminated calls to fixed IP
addresses, and no modem upgrades will be required.