Testlauf Controller 1.) Invite SJPDA 2.)Invite PSTN 3.) (Re-)Invite SJPDA

Controller -> SjPDA

OK SJPDA -> Controller

ACK Controller -> SJPDA

Invite Controller -> PSTN

OK PSTN -> Controller

ACK Controller -> PSTN

(2.)INVITE Controller – SJPDA

(2.)OK SJPDA –Controller (answer from SER and not from SJPDA)

(2.)ACK Controller – SJPDA