Hi

Here is the scenario:

UAC                                                  UAS(openser)                                         termination server
   |                                                                  |                                                                   |
   |-----------------INVITE---------------------->|                                                                   |
   |<----------------100 Trying-------------------|                                                                   |
   |                                                                  |-----------------INVITE----------------------> |
   |                                                                  |<----------------100 Trying--------------------|
   |                                                                  |<----------------403 Forbidden---------------|
   |                                                                  |-----------------ACK-------------------------> |
   |<-----------------403 Forbidden-------------|                                                                   |
   |-----------------ACK-------------------------> |                                                                   |
   |                                                                  |-----------------INVITE----------------------> |
   |<-----------------403 Forbidden-------------|                                                                   |
   |-----------------ACK-------------------------> |                                                                   |
   |                                                                  |-----------------INVITE----------------------> |
   |<-----------------403 Forbidden-------------|                                                                   |
   |-----------------ACK-------------------------> |                                                                   |
   |                                                                  |-----------------INVITE----------------------> |
   |<-----------------403 Forbidden-------------|                                                                   |
   |-----------------ACK-------------------------> |                                                                   |
   |                                                                  |-----------------INVITE----------------------> |
   |<-----------------403 Forbidden-------------|                                                                   |
   |-----------------ACK-------------------------> |                                                                   |

This how openser sends re sends invite to termination server indefinitely.

Please need your help.
It would be appreciated.

Thanks,
Krunal Patel