| 摘要 |
A method for conversion between SIP message and ISUP message for number portability service and corresponding conversion apparatus are provided. In the method for converting the ISUP message into the SIP message, the ISUP message is received and parameters related to number portability are read from the ISUP message, a number portability type is determined according to the parameters related to number portability, and the parameters related to number portability are mapped into the SIP message based on the number portability type. The SIP message includes: destination address parameter, which represents destination user number; npdi parameter, which indicates execution of the number portability dip and uniquely identifies the number portability type; and rn parameter, which represents the number to be routed to the destination user number. The conversion apparatus for converting ISUP message into SIP message and the method for converting SIP message into ISUP message and corresponding conversion apparatus are also provided.
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