3 kinds of call forwarding are possible:
- CFU - Call Forwarding Unconditional
ADD-ACTDA:TYPE=STN,STNO=<station number>,FEATCD=FWD,CFVAR=<call
forwarding variant>,DTYPE=CFU,SI=VCE;
- CFNR - Call Forwarding No Reply
ADD-ACTDA:TYPE=STN,STNO=<station number>,FEATCD=FWD,CFVAR=<call
forwarding variant>,DTYPE=CFNR,SI=VCE;
- CFB - Call Forwarding Busy
ADD-ACTDA:TYPE=STN,STNO=<station number>,FEATCD=FWD,CFVAR=<call
forwarding variant>,DTYPE=CFB,SI=VCE;
INFO:
For legacy SIP devices with S0PP, SI=SPCH must be used.