For CDR Call Splitting to work properly, QSIG Advice of Charge must be set to receive charge information during the call. (Call Splitting applies to calls with endpoints within a Communication Manager system as parties of a call that also have a trunk endpoint in the call for which CDR is enabled.)
If Call Splitting is enabled, the CDR record associated with the final party on an outgoing call contains the ISDN call charge for the entire call, since no charge advice data is available until the final party drops off the call. The ISDN call charge in all earlier CDR records is 0 (zero). However, the Elapsed Time in the CDR records is correct and can be used to allocate the call charge among the parties on the call.
If Call Splitting is disabled, the CDR record associated with the party that made the initial outgoing call contains the ISDN call charge for the entire call.
For calls diverted to another switch, if Call Splitting is enabled when an outgoing call is transferred, a CDR record is issued for the initial portion of the call, and the ISDN Call Charge field reports the Advice of Charge information received thus far. Subsequent Advice of Charge information received from the network for the outgoing call is not sent to the switch to which the call is diverted.
In cases in which the CDR adjunct is to collect information at a switch other than the one directly connected to the PSTN, all switches in the PTN must be upgraded to be able to transport the QSIG messages at the served user switch.
