Grandstream Networks GXP-2000 User Manual
Page 15
GXP-2000 User Manual
Grandstream Networks, Inc.
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• Once pressed, the dialed number will be displayed on the LCD as the
corresponding DTMF tone played out.
• If the “SEND” button is not pressed, the phone will wait for about 5 seconds
before initiating the call.
4.3.4 Making Calls using IP Address
Direct IP calling allows two phones to talk to each other in an ad hoc fashion without a
SIP proxy. VoIP calls can be made between two phones if
• both phones have public IP addresses, or
• both phones are on a same LAN using private or public IP addresses, or
• both phones can be connected through a router using public or private IP
addresses.
To make a direct IP calling, first pick up the phone or turn on the speakerphone, then
press “Menu” button followed by the 12-digit target IP address. If there is a user part,
press “Menu” button and then the encoded user part, followed by *3 (encoding for “@”)
and then followed by the 12-digit target IP address. Destination ports can also be
specified using *4 (encoding for “:”) followed by the encoded port number.
The follow is a table of the encoding scheme for the most commonly used characters:
Input
Encoding
00 0
01 1
02 2
03 3
04 4
05 5
06 6
07 7
08 8
09 9
*0
. (dot character)
*1
_ (underscore character)
*2
- (hyphen character)
*3 @
*4 :
(column
character)