When a call is transferred from one extension to another,
the call will be sliced and saved as two recordings. This
is however only possible if we received the SMDR data from
the PABX. Should the PABX for some reason not send SMDR
data, TAPI will be required, or else it will be one
recording only.
Eg, for the question in example, you will be able to search
on ext 123 and 321 individual