Quad Band: GSM850, EGSM900, DCS1800, PCS1900

Module automatically searches for frequencies

Band selection can be set by AT command

Compliant with GSM Phase 2/2+

GPRS multi-slot class 12 (default)

GPRS multi-slot class 1~12 (configurable)

GPRS mobile station class B

GPRS data downstream transmission: up to 85.6kbps

GPRS data upstream transmission: up to 85.6kbps

Encoding format: CS-1, CS-2, CS-3 and CS-4

Support for PAP (Password Authentication Protocol) protocols commonly used for PPP connections

Support is usually used for CHAP (Interrogation Handshake Authentication Protocol) protocol

Embedded protocol: TCP/UDP/FTP/PPP/HTTP/NTP/MMS/SMTP/PING, etc.

Support for unstructured supplementary data services (USSD)

Class 4 (2W)： GSM850  and EGSM900

Class 1 (1W)： DCS1800  and PCS1900

48mA@5V (idle)

22mA@12V（idle）

14mA@20V（idle）

-30℃- +70℃；extending to -40℃~+85℃

DC：5V~18V；powered by lithium battery：3.8V~4.6V

42×40×9.7 mm

MICRO SIM card holder

1

RST

Reset.

2

IORT

When in low level for 3~10S, module returns to factory setting and start over immediately.

3

LINK

The link connection status indication pin corresponds to the onboard left 1 LED.

High：successfully connect with network server；

Low：fail to connect with network server.

4、24、25

NC

Suspended, N/A.

5

DATA

The data transceiver indication pin, when the network receives the data or the serial port

receives the data (50ms high/10ms low), corresponding to the onboard left 3LED light.

6

STAT

The device status indication pin corresponds to the onboard left 2 LED.

Low: The device is poweredon to search for SIM card

1800ms for low, 200ms for high:the device checks the correct SIM card and is attaching to

the network;

High: The device is attached to the network successfully.

7

RXD

Data RX，default 3.3V，compatible with 5V.

8

TXD

Data TX，default 3.3V，compatible with 5V.

9

VEF

Drive level power supply pin, if user need to achieve serial communication and LED indication

of 5V drive level, user need to input 5V level on this pin.

10、11、14、15、23

MOD、SLE、PA0、PA1、EN

Suspended, N/A.

12

4V2

Lithium battery power supply pin，range：3.8V~4.6V. This pin is prohibited from

being reversedand is not allowed to be supplied with VCC.

16

VCC

DC power supply pin，range：5V~18V.This pin is prohibited from being reversed and

is not allowed to be supplied with 4V2.

19

VD

Power pin to connect SIM externally, NC for pcb SIM card holder.

20

RS

Reset pin to connect SIM externally, NC for pcb SIM card holder.

21

DA

Data pin to connect SIM externally, NC for pcb SIM card holder.

22

CL

Clock pin to connect SIM externally, NC for pcb SIM card holder.

13、17、18

GND

Ground.