WEB LINK: http://www.sonicinformed.co.za/catalogue/ungrouped/eki-1321-ae;

Advantech EKI-1321-AE 1Port RS232/422/485 To GPRS IP Gateway With Built-in 15KV ESD Protection For All Serial Signals + Support SDGC SD Card For Data Buffering - Black Colour

Features:
-Universal quad-band GSM/GPRS 850/900/1800/1900 MHz
-Dual SIM for telecom redundancy
-Support SDHC SD Card for Data Buffering
-Connect Ethernet and Serial Devices over VPN
-Various operation modes: COM port redirector, RVCOM, TCP, UDP, SMS tunnel, and pair connection
-Any baud rate setting for easy configuration
-Built-in 15 KV ESD protection for all serial signals
-1.5 KV isolation protection (EKI-1321)
-2 digital inputs (EKI-1321)
-Multiple configuration methods: Windows utility, Telnet, and Web console

-Weight: 600g
-Dimensions: (L)22 x (W16 x (H)6cm

What's in the box:
-1x Advantech EKI-1321 RS232 to GPRS IP Gateway