User's Guide
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HT81x User Guide 
Attended Transfer 
Assume that the call is established between phone A and B are in conversation. The phone A wants to 
attend transfer phone B to phone C:   
1.  On the phone A presses FLASH to hear the dial tone.   
2.  Phone A dials the phone C’s number followed by # (or wait for 4 seconds).   
3.  If phone C answers the call, phones A and C are in conversation. Then A can hang up to complete 
transfer.   
4.  If phone C does not answer the call, phone A can press “flash” to resume call with phone B. 
Note: When attended transfer fails and A hangs up, the HT81X will ring back user A to remind A that B is 
still on the call. A can pick up the phone to resume conversation with B. 
3-Way conferencing 
The HT81X support Bellcore style 3-way Conference. To perform the 3-way conference, we assume that 
the call is established between phone A and B are in conversation.Phone A(HT81X) wants to bring third 
phone C into conference:   
1.  Phone A presses FLASH (on the analog phone, or Hook Flash for old model phones) to get a dial 
tone.   
2.  Phone A dials C’s number then # (or wait for 4 seconds).   
3.  If phone C answers the call, then A presses FLASH to bring B, C in the conference.   
4.  If phone C does not answer the call, phone A can press FLASH back to talk to phone B.   
5.  If phone A presses FLASH during conference, the phone C will be dropped out.   
6.  If phone A hangs up, the conference will be terminated for all three parties when configuration 
“Transfer on Conference Hang up” is set to “No”. If the configuration is set to “Yes”, A will transfer B 
to C so that B and C can continue the conversation. 
Call Return 
In order to call back to the latest incoming number.   
1.  Pick up the handset of the connected phone (Off-hook).   
2.  After hearing the dial tone, input “*69”, and follow by “#” or wait for time out.   
3.  Your phone will automatically call back to the latest incoming number. 
Note: All star codes (*XX) related features mentioned above are supported by ATA default settings. If your 
service provider provides different feature codes, please contact them for instructions. 










