how can i connect more then two Xbee modules together, without issues?

Ok, the project is a model train layout control system using DCC++ (DccPlusPlus · GitHub). I have gotten the Xbee modules to operate the DCC++ base station, but what if I want to integrate a third Xbee? is there a way to do it without serial collisions? keep in mind I need bi-directional communication.

I only have two Xbee modules right now, but I plan to get more in the future.

Figure, to begin, it will be an B <- -> A <- -> C layout to begin with, where A is the master module, and B and C do not need to communicate with each other.

I have read the Xbee manual and datasheet from Sparkfun, and the only thing I found was Broadcast Mode, but I am not sure if this is what I want.

No applicable code or schematics right now.

Thank you in advance for any help.

~Travis

I only have two Xbee modules right now

Series 1 (point to point) or Series 2 (mesh network)?

Figure, to begin, it will be an B <- -> A <- -> C layout to begin with, where A is the master module, and B and C do not need to communicate with each other.

That would require series 2 models, with A the coordinator and B and C as end devices/routers.

and the only thing I found was Broadcast Mode, but I am not sure if this is what I want.

Probably not.