Symptom:
◾Desk Phone1 (Cluster1) - DN 10190
◾Desk Phone 1 has RD configured as 65003 (Cluster2)
◾Desk Phone 2 (Cluster1) - DN 10000

Call Scenario:
1) Desk Phone 2 dials 10190
 2) Desk Phone 1 starts ringing. After a while RD starts ringing.
 3) Answer the call from RD -> call is connected between 10000 and 65003
 4) Dust (Session Hand-off) the call from RD i.e. dial *74
 5) Line on Desk Phone starts flashing - Do not answer
 6) End the call from RD
 7) End the call from Desk Phone 2
 8) Desk Phone1 line is still flashing and on answering even goes to connected state and does not get disconnected at all.

Conditions:
The call is routed through H323 GW or H323 Trunk.