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UC560 Inbound Call - Invalid number format (incomplete number)


Whilst playing with a UC560 setup that makes use of 3 ISDN lines I seem to be getting the below error on inbound calls. I've had a brief hunt round but can't make sense of the actual error, I'm assuming it's due to how the numbers are being presented to the UC box and it needs some further manipulation? Any help appreciated (called from a mobile to the ISDN number, last few digits swapped out)


000191: Aug 15 07:52:34.855: ISDN BR0/1/0 Q931: RX <- SETUP pd = 8  callref = 0x01

        Sending Complete

        Bearer Capability i = 0x8090A3

                Standard = CCITT

                Transfer Capability = Speech

                Transfer Mode = Circuit

                Transfer Rate = 64 kbit/s

        Channel ID i = 0x89

                Exclusive, B1

        Calling Party Number i = 0x2183, '759019xxxx'

                Plan:ISDN, Type:National

        Called Party Number i = 0x81, '635xxx'

                Plan:ISDN, Type:Unknown

000192: Aug 15 07:52:34.863: ISDN BR0/1/0 Q931: TX -> CALL_PROC pd = 8  callref = 0x81

        Channel ID i = 0x89

                Exclusive, B1

000193: Aug 15 07:52:34.891: ISDN BR0/1/0 Q931: TX -> DISCONNECT pd = 8  callref = 0x81

        Cause i = 0x809C - Invalid number format (incomplete number)

000194: Aug 15 07:52:34.939: ISDN BR0/1/0 Q931: RX <- RELEASE pd = 8  callref = 0x01

000195: Aug 15 07:52:34.943: ISDN BR0/1/0 Q931: TX -> RELEASE_COMP pd = 8  callref = 0x81

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