MeiG
Product
Manual
of
SLM750
Module
SLM750
Module
Hardware
Design
Page 13, total 84 pages
Support EDGE multi-slot class 12(default 12)
Support GMSK and 8-PSK
Downlink coding format: CS 1-4 and MCS 1-9
Uplink coding format: CS 1-4 and MCS 1-9
Network protocol features
Support
TCP/UDP/PPP/FTP/HTTP/SMTP/MMS/NTP/PING
/QMI protocol
Support PAP(Password Authentication Protocol)and
CHAP(Challenge Handshake Authentication Protocol)
Short message service
Text and PDU mode
Point to point MO and MT
Short message cell broadcast
Short message storage: default stored in module
Multimedia message service
AP terminal is required to realize MMS protocol
USIM card interface
Support USIM/SIM card: 1.8V and 3V
Audio features
Support 1 channel digital audio interface: PCM interface
GSM: HR/FR/EFR/AMR/AMR-WB
WCDMA: AMR/AMR-WB
LTE: AMR/AMR-WB
Support echo cancellation and noise suppression
PCM interface
For audio use, need to connect the codec chip
Support 8 bit A-law, u-law and 16 bit Linear coding
format
Support long frame mode and short frame mode
Support master mode and slave mode, but in the long
frame it can only be used as the master mode
USB interface
Compatible USB2.0 features (only support slave
mode),maximum data transfer rate reaches 480Mbps
Used for AT command, data transmission, GNSS NMEA
output, software debugging and software upgrading
USB drive: support Windows7, Windows8/8.1,
Windows10, Linux 2.6 or higher version, Android
2.3/4.0/4.2/4.4/5.0/5.1/6.0/7.0
Serial port
Main serial port:
Used for AT commands and data transfer
Maximum baud rate is 3000000bps,default 115200bps
Support RTS and CTS hardware flow control
Debug serial port:
Used for Linux control, log output
Baud rate is 115200bps
RX-diversity
Support LTE/WCDMA/CDMA RX-diversity
AT command
Confirm to 3GPP TS 27.007, 27.005 and added new
MeiG AT commands
Network indication
The two pins NET_STATUS,NET_MODE indicate the
network status
