• OHCA is only available with certain digital proprietary telephones.
• 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 SDN
extension. When a call is made from another extension, a PDN extension will receive a call
waiting tone. (® 1.3.51 PDN (Primary Directory Number)/SDN (Secondary Directory
Number) Extension)
• For information about answering a waiting call, refer to "1.3.12 CALL WAITING
FEATURES".
1.3.47 One-numbered extension
Two telephones connected to the PBX can be set to share 1 extension number, and both telephones can be
set to ring (One-numbered Extension feature). You can choose whether the sub extension associated with the
main extension will ring when an incoming call is received.
To set
Enter extension number
of the paired telephone.
extension no.
Enter 48.
4 8 1
C.Tone
Enter 1.
PT/SLT/SIP Extn.
Off-hook.
On-hook.
To cancel
Enter 48.
4 8 0
C.Tone
Enter 0.
PT/SLT/SIP Extn.
Off-hook.
On-hook.
Document Version 2014-11 Operating Manual 125
1.3.47 One-numbered extension
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