619.1.2 Use the BLF FunctionThe BLF, also known as a "busy light field," notifies the user of the status of thesubscribed object and is used by the server to pick up the call. BLF helps you monitor theother person's status (idle, ringing, talking, off).BLF function˖z Monitor the status of subscribed phones.z Call the subscribed number.z Transfer calls/calls to the subscribed number.z Pickup incoming calls from subscribed number.1˅ Monitors the status of subscribed phones.Configuration BLF function keys, when the subscription of the number of the state (idle,ringing, talking) is changed, the function key state of LED lights will have correspondingchange, see appendix Ɋ 6.3 to get to know each other under different status leds.2˅ Call the subscribed number.When the phone is in standby mode, press the configured BLF key to call out thesubscribed number.3˅ Transfer calls/calls to the subscribed number.Refer to Table 9.1.1-blf function key subtype parameter list, the BLF key can be used forblind rotation, attention-rotation and semi-attention-rotation of the current call, and alsocan invite the subscribed number to join the call and send DTMF, etc.4˅ Pickup incoming calls from subscribed phones.When configuring BLF function key, configure the pickup number.When be subscription number telephone ringing, refer to appendix ȼ 6.3 BLF LED willflash a red light at this time. At this point, press the BLF button to answer the incomingcall from the subscribed number.9.2 BLF ListBLF List Key is to put the number to be subscribed into a group on the server side, andthe phone uses the URL of this group to make unified subscription. The specificinformation, number, name and status of each number can be resolved based on notifysent from the server. The unoccupied Memory Key is then set to the BLF List Key. If thestate of the subscription object changes later, the corresponding led light state will bechanged.Configure BLF List function: log in the phone page, enter the [Line] >> [SIP] >>[Advanced settings] page, open the BLF List, and configure the BLF List number.
