Dual SIM Cellular Router

What is dual SIM cellular router?
Simply speaking, it’s a cellular router supporting two SIMs. Can do backup for each other. It’s a good solution for network fail-over.
Dual sim router contains dual sim gprs router, dual sim edge router, dual sim 3g mobile router.
The dual sim 3g mobile router can updated as 3g wifi router, which built-in wifi.
The remote or mobile networks get a secure wireless connection, even if one of the cellular networks fails, the router will automatically switch to another SIM to keep the network alive.
The dual-SIM router, which comes from China cellular developer E-Lins, can automatically fails-over to the back-up network if the first one goes down, said by Jason Zou, product manager of E-Lins communication.
There are two kind of backup. One is hot backup, the other is cold backup.
Hot backup is that the two sims can switch to the other one just if the current sim failed. Cold backup is users can set one sim as main worker, then the router can automatically switch to the backup one if fails, and it will switch to the main sim if the router find the main networks restored.
The dual sim mobile router also has features of NAT firewall - like a home broadband router - and a VPN client supports both L2TP, PPTP, GRE, Ipsec, which bring high security for the network and links.
The dual sim router works for wireless m2m solutions, such as live camera monitors, ATMs, POS. many other applications.

Originated by zouyanbing from blog of Wireless & Cellular Modem/Router/AP Device, please claim the link once copy.