A: "Stockholm, SmallJet 123 on 13342"
S: "SmallJet 123 Stockholm"
A: "Stockholm, Smalljet 123. Phone patch with company please."
S: "SmallJet 123 Stockholm, stand by on SELCAL AB-CD" TWEET-TWOO
A: "SELCAL OK Smalljet 123"
...
TWEET-TWOO
A: "SmallJet 123 answering SELCAL"
S: "SmallJet 123 Stockholm, I have your phone patch with company, go ahead."
Unfortunately it's still cheaper than Satcom.