Status display with BLF and Presence
The PBX supports the SIP functions BLF and Presence. This allows the busy and present status of the internal call numbers to be sent to VoIP telephones that support these functions. This allows such a telephone to be used in a switchboard or similar application.
You can use these functions with the following VoIP end devices:
•Telephones of the COMfortel D-series: BLF and Presence
or other Auerswald/FONtevo VoIP phones (except COMfortel VoIP 2500 AB): BLF
The display is done via LEDs of those function keys which are assigned to speed dialling.
You will find more information in the instruction of your telephone.•VoIP end decives of other manufacturers
You will find information in the instruction of your telephone.Busy status (BLF)
With the SIP function BLF (Busy Lamp Field, in accordance with RFC 4235), the PBX transmits the following information on the busy status of the monitored internal call number (users, groups, park positions of call parking, voice mail/fax boxes or door terminals):
•Busy (with call number of the users communication partner)
•Incoming call (with call number)
•No active calls or conversations
The display of call numbers on an incoming call or during a call is unlike the other information protected by the preliminary pick-up query and monitoring setting for users and groups.
Further help under Pick-upPresence status (Presence)
With the SIP function Presence, the PBX transmits the following information on the presence status of the monitored user call number:
•Available
•No associated phones or associated phones not registered
•Call forwarding immediately enabled
•Do not disturb enabled
You will find more information about display in the instruction of your telephone.Configuration
•For display of call numbers switching on preliminary pick-up query and monitoring for users and groups.
−User > Phone numbers > > Configure > Settings
−Groups > Phone numbers > > Settings
•For display of call numbers configuring preliminary pick-up query and monitoring configuration-dependent/time-controlled for users and groups.
−User > Profiles > > Settings
−Groups > Profiles > > Settings
•Set up a speed dial key in the phone (here: COMfortel D-series) for each internal number to be monitored.
−Function keys
−Function:Speed dialling
−Number/URI: internal number
−Signal BLF or for phones up to version 2.6 Subscription: on
−Signal presence: on
You will find more information in the instruction of your telephone.