[SIPForum-discussion] Help me to reproduce the following scenario

[shiva kumar]

Suggest me one tool for testing this.
I have already used Sipp but when i disconnect the tcp connection i.e client
side script and start the server script which receives the 183. It throws
and error saying that "Expecting 183 but received 183 Session Progress adn
hence aborting the call"

Here our S-CSCF should be any tool such as sipp and the AS is our SIP
Application Server

1. Via SIP (TCP), it sent 183 to INVITE.
2. TCP connection used to send the above 183 was disconnected.
3. AS reconnected TCP.
4. AS sent 183 again.
5. UE sent 183 to PRACK but got an error response (481).


Sequence when the issue happens:
  S-CSCF         AS
    |             |
    | INVITE      |
    |------------>|
    |         100 |
    |<------------|
    |         183 |
    |<------------|
    |             |
 ��Disconnecting TCP used for INVITE
    |             |
    |             |
    |         183 |  ��AS reconnected TCP and resent 183
    |<------------|
    |             |
    | PRACK       |  ��PRACK got an error response, 481
    |------------>|
    |         481 |
    |<------------|
    |             |
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