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Choose Number Management - Cause Codes in the main menu, to view the table of cause codes. Cause codes are used to specify the reason why a telephone call ended. These codes are predefined by the system. The table is for informational purposes only. Cause codes are defined in ITU-T Specification Q.850 "Usage of cause and location in the Digital Subscriber Signalling System No. 1 and the Signalling System No. 7 ISDN User Part". In systems which are connected by SIP, a mapping from SIP to Q.850 is performed. |
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