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HandyTone-488 User Manual Grandstream Networks, Inc.
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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.
5.2.5 Send and Receive PSTN Calls
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.
5.2.6 VoIP-to-PSTN Calls
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.
5.2.7 PSTN-to-VoIP Calls
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.
5.3 Call Features
5.3.1 Call Features Table
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)