Configuration settings for most reliable communication

Hello
I would like to buid reliable communication at my point to multipoint application. Could you please let me know which parameters and their values are suitable at my application?
Master and slaves at unicast mode, communcation speed at 19200bps.
Thanks for any response.

Make sure ID and CH match on all your modules to allow inter-communication between them. Beyond that, the other configuration settings really depend on how you want to use them, so I refer you to our knowledge base and the Product Manual to get some ideas:

http://ftp1.digi.com/support/documentation/90000982_B.pdf