Public telephone network

A public telephone network having a subscriber line for which an additional service feature of call forwarding to a predetermined destination call number is provided, the call forwarding being designed for forwarding an indication, the indication being at least one of a message waiting indication and an e-mail waiting indication, the public telephone network including at least one of exchanges and service switching points comprising:

• parts for checking a presence of call forwarding on an associated subscriber line in response to a reception of an indication on the subscriber line;
• parts for linking the indication to the call forwarding destination call number;
• parts for forwarding the indication to at least one of the exchange responsible for the destination call number and the competent service switching point;
• and
• parts for setting a call forwarding flag for the indication arriving via call forwarding for preventing rejection of the indication on a line of the destination call number.