Patent ID: 6016340
Filing Date: 2000-01-18
Classification: H04L,H04M

Abstract:
A method of operating a telecommunications network including at least one switch means for routing calls and a processing means, comprising the steps of:generating a billing record for a call including at least a plurality of data bytes;duplicating each record,generating check information from each data byte of a record and associating it with each said data byte to form a protected record,transmitting each protected record of a duplicated pair respectively via two independent transmission lines to said processing means;generating the associated check information byte-for-byte from each received record and comparing byte-for-byte the generated check information with the transmitted check information,if for any one byte of a record the generated check information does not agree with the received check information, discarding that record;if there is no inconsistency between the received and generated check information for both records of a duplicated pair, comparing the bits of the two records of the pair with each other;if any difference is found between the records of the pair, discarding both records; andotherwise storing the received records.