Obviously a GSM modems are unstable. The best way to do is put Kannel on a stand alone server with VPN to the telcos or to an SMS-aggregators. That way, it's s

Obviously a GSM modems are unstable. The best way to do is put Kannel on a stand alone server with VPN to the telcos or to an SMS-aggregators. That way, it's stable. [update]: fixed typos