In setting up a recent site for a Hotel, using a Ericsson BP250, I discovered that the hotel phones were not barred during check in/out. The procedure completed successfully, but the extension remained open despite being checked - out. The setup of the PABX had the extensions setup as guest phones - no joy. In the end, the operator had been adjusted to 4777. By changing the operator to 9 I managed to get the call barring to work. Further experimenting proved that the operator (not the SWB!) had to be 9. Any other number and call barring with check in/out does not work.
