Some modems may need initialization strings to connect to some paging carriers. If the modem keeps dialing and connecting, but does not send the message, chances are a modem initialization string is needed. Some common initialization strings are below. If you have a less well known brand modem, you may need to use the documentation with your modem to create an init string. Additional codes forces a 1200 baud connection.
Additional codes turns off error correction and data compression.
Set the baud rate to 300 when using this string. Turns off error correction and data compression. Forces a 1200 baud connection. I have tried the init string but still get inconsistent results. Try setting the baud rate on the carrier setup screen to 19200.