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Busy Lamp Field – Speed Dial

Busy Lamp Field – Speed Dial

What is BLF (Busy Lamp Field)?  The BLF feature allows a user to monitor the real-time status of another user at a directory number or SIP URI from the device of the watcher. Let’s say User A wants to monitor the real-time status of User B, User A can configure a Speed Dial BLF on his/her phone and can see the live/current status of User B if he/she is idle or on a call.
Let’s configure this – Configuration is quite easy and simple!!
Prerequisite – Ensure that BLF For Call Lists is Enabled in Enterprise Parameters. By Default this parameter is Disabled.

  1. Go to Device > Device Settings > Phone Button Template > Add new
  • Phone Button Template > Select appropriate template from Drop Down Menu for your Phone Type
  • Click on Copy
  • Button Template Name > Give a name to the Phone Button Template
  • Click on Save
  • Go to Line Button number based on your requirement from 2 – 8  > Select Speed dial BLF from Drop Down Menu and Enter a Label
  • Click on Save

2.  Go to Phone > Apply the Phone Button Template and Reset the Phone

  • You will be able to see Busy Lab Field on the Left hand Side under Lines
  • Click on BLF and ensure that popup is enabled
  • Enter the Extension number you want to monitor the Phone
  • Enter a Label – Name or Extension
  • Enter a Label ASCII
  • Click on Save and Close
  • Subscribe Calling Search Space – Configure the CSS so that the Phone has authority to reach the desired Destination Phone’s Partition
  • Save the Phone page and Reset the IP Phone
  • You will be able to see a Speed Dial button on your IP Phone

Testing : – ON HOOK and OFF HOOK
Now when User B is in ON hook the icon will be shown as below, which means IDLE.
Now when the User B goes OFF hook the icon will be shown as below, which means BUSY.

Published by Team UC Collabing

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Electrical Engineer CCNA Collaboration CCNA Voice CCNA R&S. I'm Electrical Engineer and I work like Support Engineer for a Telephony Service Provider Company. Before that I had position like Pre-Sale Engineer about small and medium multivendor telephony solutions. I have 5 years of experience working in Telephony Multivendor Projects. I am also 3 years of experience working in Support and implementation about Cisco Collaboration platforms: UCS server, UCM, Cisco Unity, Presence Server, Jabber, Gateway. Support Community is most useful in finding design, implementation and support tricks and shortcuts that greatly help me in my daily activities. If you need to contact me, please you can writte me.


CCNA Routing and Switching
Am a technology enthusiast. I work in network support providing support with implementation, maintaining and precisely troubleshooting the infra.
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