I’m having trouble connecting to an SMPP server. What can I do?

Please check the following:

• Is the hostname or IP address correct?
• Is the TCP port number correct?
• Are outbound connections on this port allowed by your firewall?
• Try to increase the SMPP command timeout value.
• Make sure you registered your IP address with the provider. Some providers need to set up your IP in their firewall.
• Is it possible to ping the SMPP server?
• What happens when you try telnet from the command prompt: telnet ‘hostname’ ‘portnumber’. Is there any connection?

If this does not help, please contact your SMPP provider. Ask if they can help debug your connection.

You can also monitor the SMPP protocol on TCP/IP level as described in the following document.