Introduction - Grandstream Networks GXP21 Series Configuration User Manual

INTRODUCTION

Busy Lamp Field (BLF) feature allows an end user, such as attendant, to monitor the hook status of a list of users.
GXP21xx/17xx/16xx supports Busy Lamp Field (BLF) on the Multi-Purpose Keys and Virtual Multi-purpose keys
on the phone. GXP2140 and GXP2170 are expandable with 1 to 4 expansion modules to support BLF feature. This
document serves as an end user guide on how to configure Grandstream GXP21xx/17xx/16xx Enterprise IP
phones for Busy Lamp Field feature.
Note: For GXP16xx series, only GXP1628 and GXP1630 support BLF configuration.
basic and advanced features, please visit link
To learn more about GXP21xx/17xx/16xx's
to download the latest "GXP21xx/17xx/16xx Administration Guide" and
http://www.grandstream.com/support
"GXP21xx/17xx/16xx User Guide".
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BLF Configuration User Guide