` ?>
Connect the PBX to the Fon S0 socket on the FRITZ!Box and work through the following instructions:

  1. Delete all Multiple Subscriber Numbers (MSNs) in the PBX.
  2. Assign the following Multiple Subscriber Numbers (MSNs) to the extensions of your ISDN PBX.
` `
  1.    as the outgoing MSN (the number for outgoing calls).

` ?>
` ?> ` ?> ` ?>
Number