To set
Unconditional Call Forward ON
Dial "*72" for a dial tone. Dial the forwarding number followed by "#". Wait for dial
tone. LCD will display "Call FWD Activated"
To
Cancel Unconditional Call Forward: dial "*73" and get the dial tone, then hang up.
LCD will display "Call FWD Activated
but, since you have tried those two, it could be that there might still be a different type of call forward option that is still ON, on your phone like
Busy Call Forward and
Delayed Call Forward
1. To Cancel Busy Call Forward: dial "*91". Wait for dial tone. Hang up.
2.To Cancel Delayed Call Forward: Dial "*93" for a dial tone, then hang up.
Let me provide you a link to the website which I used as a reference for your future reference.
http://www.grandstream.com/user_manuals/GXP_User_Manual.pdf
×