Solution : https://service.sap.com/sap/support/notes/805686 (SAP Service marketplace login required)
Key words :
yyyy/mm/dd hh, process pppp thread ttttlocation, ttt error 0x60001, 0x80000018tapi error text, dlla timing problem, 20 support package 52 phone, 40 support package 8 phone, --------------> extended tapi information, cccccsecond call handle, sporadically call handle
Related Notes :
171201 | SAPphone Server: Versions and TAPI service provider |