I have a avaya v11 pbx (node1) that I need to 4-digit dial to a v7 pbx (node3) through another pbx v8 (node4). Node 1 is dcs'd to node 4 (tie trunk) and node 4 is dcs'd to node 3 (isdn tie trunk). For some reason, node 3 CAN 4-digit dial back to node 1 through node 4, but node 1 CANNOT 4-digit dial to node 3 through node 4(I get a ring no answer). In essence, it only works 1-way. Node 4 and node 3 can communicate fine between eachother. What forms do I need to change in order for node 1 to talk to node 3. Routing patterns are fine.