Good. Have modem HUAWEI E1550 (can be replaced by HUAWEI E150) connected to a PC running win7 (you can do it all in UBUNTU). Need to do this with another server, a request is sent to the PC with the modem (from PHP script) and actually sent SMS (send text only, numbers - fixed (3)). To use online services is not an option (because it is a channel for notifications in the event of a fall the Internet). How it can be implemented?