How can I send SMS messages from my mobile/router? (Linux/Textmode)

I love mails sent to me from my own system, but I want more... I want... for instance, texts about my system, and a little web-based SMS sender too. So, I buy a GSM (3G) router. This router can also send SMS messages, and here is my question: Is there some (_commandline_) utility to use from Perl/Bash/PHP scripts to do so? And no, I do _not_ want to rely on a script that calls a free web-based SMS sender. I want to use _my_ router, _my_ number.