In the case of CFNR during a recall to the AC or during an attendant
intercept (parallel call), the call to the AC is terminated and CFNR
is carried out.
CFNR for interworking with DPNSS1 (redirecting service).
Multiple hop interactions with CFNR, call forwarding unconditional
and call forwarding busy.
CFNR after transfer from a second consultation call.