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Cisco Bug: CSCun44400 - Two DataPassThroughReq within 1 sec causes TransactionId '0' in Response

Last Modified

Sep 16, 2014

Products (1)

  • Cisco Unified IP Phone 7900 Series

Known Affected Releases


Description (partial)

Multiple DatapassthroughReq in a short period of time, causes the Cisco Wireless IP Phone 7925 to respond back with TransactionID '0' (Zero) in DatapassthroughRes. This causes CUCM/CTI/JTAPI/TAPI Application to timeout CTI Datapassthrough Requests.

"CtiRequestTimer Timer Expired" and "deviceDataPassThrough request failed" would be seen in the CTI manager logs. 

Wireshark Filter = (skinny.messageid == 0x0000013f) || (skinny.messageid == 0x00000042) would display TransactionID = '0' under SCCP

Using an XSI application that sends XSI messages back to back.
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