User's Manual
FIRMWARE VERSION 1.0.7.6    HT502 USER MANUAL     Page 20 of 48  
3.  If C answers the call, then A presses FLASH to bring B, C in the conference. 
4.  If C does not answer the call, A can press FLASH back to talk to B. 
5.  If A presses FLASH during conference, C will be dropped out. 
6.  If A hangs up, the conference will be terminated for all three parties when configuration “Transfer 
on Conference Hangup” 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. 
FAXSUPPORT
HT502 supports FAX in two modes: 1) T.38 (Fax over IP) and 2) fax pass through. T.38 is the preferred 
method because it is more reliable and works well in most network conditions. If the service provider 
supports T.38, please use this method by selecting Fax mode to be T.38 (default). If the service provider 
does not support T.38, pass-through mode can be used. 










