User's Guide
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HT81x User Guide 
*90 
Busy Call Forward: Dial “*90” and then the forwarding number followed by “#”. Wait for dial 
tone then hang up. 
*91 
Cancel Busy Call Forward. To cancel “Busy Call Forward”, dial “*91”, wait for dial tone, then 
hang up. 
*92 
Delayed Call Forward. Dial “*92” and then the forwarding number followed by “#”. Wait for 
dial tone then hang up. 
*93 
Cancel Delayed Call Forward. To cancel Delayed Call Forward, dial “*93”, wait for dial tone, 
then hang up 
Flash/ 
Hook 
Toggles  between  active  call  and  incoming  call  (call  waiting  tone).  If  not  in  conversation, 
flash/hook will switch to a new channel for a new call. 
# 
Pressing pound sign will serve as Re-Dial key. 










