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INTRODUCTION
Busy Lamp Field (BLF) feature allows an end user, such as attendant, to monitor the hook status of a list of
users. GRP26XX supports Busy Lamp Field (BLF) on the Multi-Purpose Keys on the phone. This
document serves as an end user guide on how to configure Grandstream GRP Carrier-Grade IP Phones
for Busy Lamp Field feature.
To learn more about GRP26XX’s basic and advanced features, please visit link
http://www.grandstream.com/support to download the latest “GRP26XX Administration Guide” and
“GRP26xx User Guide”.
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