Patent ID: 9210485
Filing Date: 2015-12-08
Classification: H04L,H04M,H04Q

Abstract:
1. A device for recognizing selected digits of a call number comprising: an exchange device having a call number storage unit, a detection unit, a comparator unit, and a conversion unit; and the call number storage unit storing a plurality of call numbers in at least one non-transitory computer readable medium, each of the stored call numbers having a complete number of digits, at least one call number of the plurality of stored call numbers having at least one placeholder as a digit in the at least one call number; and the detection unit detecting a string of digits, the string of digits having a number of digits that is less than the complete number of digits of each of the plurality of stored call numbers, the string of digits comprising prefix digits for a private branch exchange; and the comparator unit continuously comparing the detected string of digits to the plurality of stored call numbers to identify a desired call number that corresponds to the detected string of digits; and the conversion unit converting the desired call number identified by the comparator unit into an IP address as soon as the desired call number is identified; and wherein the call number storage unit deletes a stored call number of the plurality of stored call numbers based on a predetermined criteria, the predetermined criteria for deleting the stored call number being the stored call number having a lowest frequency of use or the stored call number being stored for a longest period of time.