• Whisper OHCA is only available with certain digital proprietary telephones and IP proprietarytelephones. In addition, both you and the other party must use supported telephones.• Whisper OHCA is not available for outside calls; only call waiting tone can be set (refer to"1.3.13 Call Waiting Tone").• A PDN extension can only receive OHCA or Whisper OHCA from the corresponding SDNextension. When a call is made from another extension, a PDN extension will receive a callwaiting tone. (® 1.3.50 PDN (Primary Directory Number)/SDN (Secondary DirectoryNumber) Extension)• For information about answering a waiting call, refer to "1.3.12 CALL WAITINGFEATURES".1.3.78 Wireless XDP Parallel ModeYour PS can be used in parallel with a PT or SLT.When in this mode, incoming calls to a wired telephone also ring the paired PS.To setPSEnter extension numberof the paired telephone.Press CANCEL.PSextension no.Press TALK. Enter 48.4 8 1 C.ToneEnter 1.To cancelPSPSPress CANCEL.Press TALK. Enter 48.4 8 0 C.ToneEnter 0.• Some wired telephones are prohibited from using this feature.• If you go off-hook while your paralleled telephone is in use, the call will switch over toyou.Document Version 2010-08 Operating Manual 1511.3.78 Wireless XDP Parallel Mode