Support for change of numbers

A method for routing calls to a plurality of telephony devices when the telephone numbers used to identify said plurality of telephony devices have been converted from an old series of telephone numbers having a first numbering scheme to a new series of telephone numbers having a second numbering scheme, wherein said second numbering scheme comprises numbers having a greater number of digits than said first numbering scheme, said method comprising the steps of:

• receiving a call request for one of said telephony devices;
• examining at least a portion of a telephone number in said call request to determine whether one or more digits correspond to said old series of telephone numbers that have been converted to said second numbering scheme;
• and
• if said telephone number corresponds to a telephone number that has been changed to said second numbering scheme:
• i) determining the one or more digits to be appended to said telephone number to convert it to said second numbering scheme;
• ii) appending said one or more digits to said telephone number to obtain a new telephone number for said telephony device;
• and
• iii) completing said call request using said new telephone number.