Grandstream Networks Grandstream HandyTone HandyTone-488 ユーザーズマニュアル

12 

1.  A presses FLASH (on the analog phone, or Hook Flash for old model phones) to get a 

dial tone 

2.  A then dial C’s number then # (or wait for 4 seconds).  A and C now in conversation. 
3.  A can hang up. 

 
Note:  When intended Transfer failed, if A hangs up, the HandyTone-488 will ring user A 
again to remind A that B is still on the call, by pressing FLASH or Hook again will restore the 
conversation between A and B. 
 

 
Users can send and receive calls from PSTN. To receive PSTN calls, simply take the phone 
off hook when the analog phone rings.   To make a PSTN call, first press *00 (or your own 
PSTN Access Code) to get the PSTN line dial tone and dial the PSTN number.  
 

 
To make a VoIP-to-PSTN call, users need to dial the FXO SIP account phone number first. A 
ring tone is played once followed by a dial tone. At this time, users can dial a PSTN 
telephone number or a mobile telephone number then # (or wait for 4 seconds).  The call will 
be established afterwards.  If no PSTN number is entered after the dial tone, HandyTone-488 
will hang up automatically in 10 seconds. 
 

 
To make a PSTN-to-VoIP call, PSTN callers need to originate a call to the FXO port 
telephone number first.  If no one answers the FXS phone after 4 ring tones, a dial tone is 
played. At this time, users can dial a VoIP telephone number then # (or wait for 4 seconds). 
The call will be established afterwards. If no VoIP number is entered after the dial tone, 
HandyTone-488 will hang up automatically in 10 seconds. 
 

 
Following table shows the call features of HandyTone-488. 
 

Key 

Call Features 

*30 

Block Caller ID (for all subsequent calls) 

*31 

Send Caller ID (for all subsequent calls) 

*67 

Block Caller ID (per call) 

*82 

Send Caller ID (per call)