Grandstream Networks Grandstream HandyTone HandyTone-488 User Manual

10 

 
 To make a phone or extension number call: 

a) Dial the number directly and wait for 4 seconds (default “No Key Entry Timeout”) .  

Or 

b) Dial the number directly, and press # (assuming that “Use # as dial key” is selected 

in web configuration). 

 
Other functions available during the call are call-waiting/flash, call-transfer, and call-forward. 

 
Direct IP calling allows two phones, that is, a HandyTone with an analog phone and another 
VoIP Device, to talk to each other in an ad hoc fashion without a SIP proxy. VoIP calls can be 
made between two phones if: 
 

•  Both HandyTone ATA and the other VoIP device (i.e., another HandyTone ATA or 

other SIP products) have public IP addresses, or  

•  Both HandyTone ATA and the other VoIP device (i.e., another HandyTone ATA or 

other SIP produces) are on the same LAN using private or public IP addresses, or  

•  Both HandyTone ATA and the other VoIP device (i.e., another HandyTone ATA or 

other SIP products) can be connected through a router using public or private IP 
addresses.  

 
To make a direct IP call, first pick up the analog phone or turn on the speakerphone on the 
analog phone, then follow Section 5.1 with voice prompt 47, followed by the 12-digit target IP 
address. Destination ports can be specified by using “*4” (encoding for “:”) followed by the 
encoded port number.   Following is a table of the encoding scheme for the most commonly 
used characters: 
 

 

Input Meaning 
00 0 
01 1 
02 2 
03 3 
04 4 
05 5 
06 6 
07 7 
08 8 
09 9 
*0 

. (dot character)