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Integration Guide
Version 1.11
GSM0000PB001
Page 44
1.11 - 4/22/03
Using Port Library
Figure 17 provides the architecture for Port Library access.
UART Driver
Port Library
Host Control Interface
Host Application
Host
Modem
Figure 17 Using Port Library
Port Libraries provide the most basic modem access services. It converts modem control messages to
either UDP SLIP or UDP PPP, and vice versa.
Modem Control Message
"
SLIP Header
IP Header
UDP Header
Modem Control Message
SLIP End
Or
PPP Header
IP Header
UDP Header
Modem Control Message
PPP End
Using Messaging Library
Figure 18 provides the architecture for Messaging Library access.
UART Driver
Port Library
Host Control Interface
Messaging Library
Host Application
Host
Modem
Figure 18 Using Messaging Library
Messaging Library provides the some important modem access services. It builds a modem control
message and converts the message to either UDP SLIP or UDP PPP before sending the data to the
modem. It also parses the modem control messages from the modem.
Parameter, Data
"
SLIP Header
IP Header
UDP Header
Modem Control Message
SLIP End
Or
PPP Header
IP Header
UDP Header
Modem Control Message
PPP End