Technical information

MUX Integration
1-16 AT Commands Reference Manual August 5, 2008
MUX Integration
Overview
The G24 is supplied with an internal GSM 7.10 protocol stack, also referred to as a multiplexer or
MUX.
The G24 with multiplexer support utility provides the following capabilities:
• Provides the terminal with up to five virtual channels on one physical RS-232 connection.
• Provides simultaneous data (CSD/GPRS) and command (AT command set) services. In this
way, many applications can use a single RS232 line via virtual channels. This enables a user
to make network and phone service inquiries and maintain data communication at the same
time.
These capabilities are illustrated in the following figure:
Figure 1-6: G24 with Multiplexer Support Capabilities
Features and Benefits
The G24 with the MUX feature ENABLES multiple channel operation and simultaneous data and
control operation. For example, it allows a user to be connected to an Internet website (GPRS
session connected), receive a file via CSD Call, and query the G24 phone book all at the same
time.
The following actions are enabled during a data session:
• Incoming call alert string RING (while G24 is in GPRS session)
• Answering to incoming call via the ATA command (while G24 is in GPRS session)
G24