Preliminary Pickup Query and Monitoring
The PBX supports the SIP function BLF (in accordance with RFC 4235). BLF allows VoIP end devices to monitor other subscribers and receive information about their calls.
Support of the SIP function BLF provides the following functions:
• Preliminary pick-up query: A preliminary pick-up query allows a subscriber, even before a pick-up, to see which caller he would be picking up. Based upon the phone number of the caller, the subscriber can then decide whether to pick up the call or not. As precondition, the called subscriber or group must have enabled "preliminary pick-up query and monitoring“.
• Monitoring or BLF (Busy Lamp Field): BLF allows VoIP end devices to monitor other internal subscribers, groups, waiting positions of call parking, voice mail/ fax boxes or door terminals and receive information about their calls. As precondition for the display of phone numbers, the monitored subscriber or group must have enabled "preliminary pick-up query and monitoring". Whether voice mail and fax boxes can be monitored in this way depends on the subscribers and groups who own the boxes or have redirected their calls to them.
You can use this functions with the following VoIP end devices:
• Auerswald/FONtevo VoIP system phones and standard VoIP phones: Other subscribers are monitored with the help of the LEDs of those function keys which are assigned to speed dialling (optional, see manual for the phone).
• Standard VoIP end devices of other vendors: As precondition to support the SIP function BLF, the
SIP convenience package /
SIP convenience package brand plus must have been unlocked (optional, see
Activation).
Monitoring of other subscribers on the same PBX depends on the end device (see manual for the end device).
Proceed as follows for configuration:
• Switching preliminary pick-up query and monitoring on.
-Using the Configuration Manager (on the following pages)
-For subscribers: Subscriber (scr.) >Properties > Settings
-For groups: Groups > Properties > Settings
• Configuring preliminary pick-up query and monitoring configuration dependent.
-Using the Configuration Manager (on the following pages)
-For subscribers: Subscriber (scr.) >Profiles > ... > Settings
-For groups: Groups > Profiles > ... > Settings