
| Grandstream Networks, Inc. | 
*4 (encoding for “:”) followed by the encoded port number. Following is a table of the encoding scheme for the most commonly used characters:
| F | 
 | 
| 00 | 0 | 
| 01 | 1 | 
| 02 | 2 | 
| 03 | 3 | 
| 04 | 4 | 
| 05 | 5 | 
| 06 | 6 | 
| 07 | 7 | 
| 08 | 8 | 
| 09 | 9 | 
| *0 | . (dot character) | 
| *4 | : (column character) | 
Examples:
If the target IP address is 192.168.0.160, the dialing convention is
Voice Prompt with option 47, then 192168000160
followed by pressing the “#” key if it is configured as a send key or wait for more than 5 seconds. In this case, the default destination port 5060 is used if no port is specified.
If the target IP address/port is 192.168.1.20:5062, then the dialing convention would be: Voice Prompt with option 47, then 192168001020*45062 followed by pressing the “#” key if it is configured as a send key or wait for 5 seconds.
Currently, we do not support 
5.2.3Call Waiting and Flashing
Grandstream HandyTone Series allows user to flash to the third party when in conversation:
•Call Waiting. If there is a incoming call, user will hear a special call waiting tone every 4 seconds, user will also notice the Call Waiting Caller ID if the analog phone supports CWCID feature.
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