User Manual

GE863-PRO

Product Description

80285ST10036a Rev. 1 DRAFT- 24/04/08

To access the three virtual interfaces, both the GSM engine and the customer application must

contain Mux components, which communicate over the multiplexer protocol.

In Multiplexer mode, AT commands and data are encapsulated into packets. Each packet has channel

identification and may vary in length.

3.31.4.2 Implementation feature and limitation

• 7.10 CMUX Basic Option used

• CMUX implementation support four full DLCI (Serial Port)

• CMUX can operate only at Fixed rate, if AT+CMUX is sent with IPR=0 an Error is returned,

with a maximum rate of 115200

• Every instance has its own user profile storage in NVM

• Independent setting of unsolicited message.

• In case of GPS product one serial port can be dedicated to NMEA output.

• Every Instance has its own independent flow control.

NOTE: More details about the Multiplexer mode are available in the Cmux User Guide.