SMS Server Tools

Redundancy

If you need a very stable system without loss of service you should read this:

Use at least 2 modems for each provider queue. If one modem stops working, the program will block it and the other one will send the remaining messages.

If a modem fails to send a single message, the program retries one time. If 3 messages fail without any succesful message between them, the modem will be blocked.

A modem remains in blocked state for about 60 minutes. After this time the program retries to use this modem.

All messages that could not be sent will be moved to the failed directory. You can decide what you want to do with them (retry or delete).

If you do not trust your computer you may run the program on more than one computer at the same time. You will need stable file server that stores the queue directories. Then both computers can access the same queues and if one of them stops working the other continues sending your messages.

Receiving messages is not redundant because you cannot receive a message with more than one modem at the same time. So if this modem stops working your messages will be hold in the queue in the SMSC (SMS Service Center) or SIM card until the modem comes back into service.