Grandstream Networks, Inc. GXP21xx User Manual Page 19 of 41
Firmware version: 1.0.1.66 Last Updated: 05/2011
appearances, the user can configure multiple line buttons to be “shared line” buttons associated with the
account.
The GXP21xx supports traditional and advanced telephony features including ca ller ID, caller ID w/name,
call forward/transfer/park/hold as well as intercom/paging and BLF.
Table 11: GXP21xx Call Features
Key Call Features
*30 Block Caller ID (for all subsequent calls)
*31 Send Caller ID (for all subsequent calls)
*67 Block Caller ID (per call)
*82 Send Caller ID (per call)
*70 Disable Call Waiting (per Call)
*71 Enable Call Waiting (per Call)
*72 Unconditional Call Forward
Dial “*72” for a dial tone. Dial the forwarding number followed by “#”. Wait for dial
tone. LCD will display “Call FWD Activated”.
*73 Cancel Unconditional Call Forward: dial “*73” and get the dial tone, then hang up.
LCD will display “Call FWD Activated”.
*90 Busy Call Forward
Dial “*90” for a dial tone. Dial the forwarding number followed by “#”. Wait for a dial
tone. Hang up.
*91 Cancel Busy Call Forward: dial “*91”. Wait for dial tone. Hang up.
*92 Delayed Call Forward
Dial “*92” for a dial tone. Dial the forwarding number followed by “#”. Wait for a dial
tone. Hang up. LCD will display “Call FWD Activated”.
*93 Cancel Delayed Call Forward
Dial “*93” for a dial tone, then hang up.
Grandstream GXP21xx Enterprise IP phone support both simple and advanced XML applications: 1) XML Custom
Screen, 2) XML Downloadable Phonebook and 3) Advanced XML Survey Application. F or more information on
how to create a downloadable XML phonebook, creating a custom idle screen and/or reprogram ming the soft-keys
on GXP21xx, please visit our website at: http://www.grandstream.com/support