Telephone call processing

摘要

This invention relates to the delivery of advanced telephony services for calls received on a local telephone exchange switch which only supports services of a first type. A call forwarding function is set on the local telephone exchange switch for incoming calls directed to the main telephone dialling number for a subscriber to forward calls to a service platform. Telephony services of a second type can be provided to some calls for the subscriber at the service platform. Other calls for the subscriber can be forwarded back to the local telephone exchange switch using an alternate telephone dialling number for the subscriber and directed to subscriber equipment. The local exchange can be reconfigured to disable a subscriber-configurability feature for services of a first type to prevent a subscriber from configuring a setting which may interfere with services of the second type provided on the service platform.