This uses the Q.931 Hold facility, and "holds" the incoming call at the ISDN exchange, freeing up the ISDN B channel. The Hold Call feature "holds" the current call to a slot. The current call is always automatically placed into slot 0 if it has not been placed in a specified slot. Only available if supported by the ISDN exchange.
Details
Action: Advanced | Hold | Hold Call.
Action Data: ISDN Exchange hold slot number or blank (slot 0).
Default Label: Hold.
Toggles: No.
Status Indication: No.
User Admin: No.
Phone Support: Note that support for particular phone models is also dependent on the system software level.
