EDW-ML8021
GSM GPRS Modem User’s Manual
Page 4
CSD:
●
Support the protocols PAP (Password Authentication Protocol)
usually used for PPP connections
●
Internet service protocols TCP/UDP/FTP/HTTP/MMS
●
Support Packet Switched Broadcast Control Channel (PBCCH)
●
CSD transmission rates: 2.4, 4.8, 9.6, 14.4 kbps non-transparent
●
Unstructured Supplementary Services Data (USSD) support
SMS
●
MT, MO, CB, Text and PDU mode
●
SMS storage: SIM card
FAX
Group 3 Class 1 and Class 2
SIM interface
Port SIM card: 1.8V, 3V,Protected against ESD with a TVS diode
array.
Serial interface
●
Support from 4800 bps to 115200 bps, default auto baud rate
●
Support RS232
●
Embed standard AT command
（
GSM07.05 and 07.07
）
Phonebook management Support phonebook types: SM, FD, LD, RC, ON, MC
SIM Application Toolkit Support SAT class 3, GSM 11.14 Release 99
Physical characteristics
79*53*21mm
1) When the module works in this temperature range, the deviations from the GSM specification
might occur. For example, the frequency error or the phase error could increase.
Table 2 Coding schemes and maximum net data rates over air interface
Coding scheme
1 Timeslot
2 Timeslot
4 Timeslot
CS-1:
9.05kbps
18.1kbps
36.2kbps
CS-2:
13.4kbps
26.8kbps
53.6kbps
CS-3:
15.6kbps
31.2kbps
62.4kbps
CS-4:
21.4kbps
42.8kbps
85.6kbps
