[Repeater-Builder] Circuit diagram for interfacing 2 maxon pm150 repeaters together

[kerinvale]

Would anyone have a simple diagram for joining 2 separate  maxon sm4450
repeaters together in real time
I.e. Rx1 --+---tx1
                 I
      Rx2--+----tx2
So what is received from rx1 transmitts to tx1 and TX 2 and what is received
from rx2 goes over tx1 and tx2  
Thank You,
Ian Wells,
Kerinvale Comaudio,
361 Camboon Road.Biloela.4715
Phone 0749922574 or 0409159932
www.kerinvalecomaudio.com.au