User's Guide
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HT81x User Guide 
CALL FEATURES 
The HT81X support all the traditional and advanced telephony features. 
Table 6: HT81X Call Features 
Key 
Call features 
*02 
Forcing  a  Codec  (per  call)  *027110  (PCMU),  *027111  (PCMA),  *02723  (G723),  *02729 
(G729), *027201 (iLBC). 
*03 
Disable LEC (per call) Dial “*03” +”number”. No dial tone is played in the middle. 
*16 
Enable SRTP  
*17 
Disable SRTP 
*30 
Block Caller ID (for all subsequent calls) 
*31 
Send Caller ID (for all subsequent calls) 
*47 
Direct IP Calling. Dial “*47” + “IP address”. No dial tone is played in the middle.   
*50 
Disable Call Waiting (for all subsequent calls) 
*51 
Disable Call Waiting (for all subsequent calls) 
*67 
Block Caller ID (per call). Dial “*67” +” number”. No dial tone is played in the middle. 
*82 
Send Caller ID (per call). Dial “*67” +” number”. No dial tone is played in the middle. 
*69 
Call  Return  Service:  Dial  *69  and  the  phone  will  dial  the  last  incoming  phone  number 
received. 
*70 
Disable Call Waiting (per call). Dial “*70” +” number”. No dial tone is played in the middle. 
*71 
Enable Call Waiting (per call). Dial “*71” +” number”. No dial tone is played in the middle 
*72 
Unconditional Call Forward: Dial  “*72”  and  then the  forwarding  number  followed  by  “#”. 
Wait for dial tone and hang up. (dial tone indicates successful forward) 
*73 
Cancel Unconditional  Call  Forward.  To  cancel  “Unconditional  Call  Forward”,  dial  “*73”, 
wait for dial tone, then hang up. 
*74 
Enable Paging Call: Dial “*74” and then the destination phone number you want to page. 
*78 
Enable Do Not Disturb (DND): When enabled all incoming calls are rejected. 
*79 
Disable Do Not Disturb (DND): When disabled, incoming calls are accepted. 
*87 
Blind Transfer 










