NOTE:
• “*” shifts down to the next menu option
• “#” returns to the main menu
• “9” functions as the ENTER key in many cases to confirm an option
• All entered digit sequences have known lengths - 2 digits for menu option and 12 digits for IP
address. For IP address, add 0 before the digits if the digits are less than 3 (like 192.168.0.26
should be key in like 192168000026, no dot needed while input). Once all of the digits are
collected, the input will be processed.
• Key entry can not be deleted but the phone may prompt error once it is detected
CALLING PHONE OR EXTENSION NUMBERS
There are currently two methods to make an extension number call:
a) Dial the numbers directly and wait for 4 (default) seconds.
b) Dial the numbers directly, and press # (assuming that “use # as dial key” is selected in the web
configuration).
EXAMPLES:
• To dial another extension on the same proxy, such as 1008, simply pick up the attached phone,
dial 1008 and then press the # or wait for 4 seconds.
• To dial a PSTN number such as 6266667890, you may need a prefix number followed by the
phone number. Please check with your VoIP service provider for this information. If your phone is
assigned a PSTN-like number such as 6265556789, you will most likely follow the rule 1 + (the
number) – 16266667890. Press # or wait for 4 seconds.
DIRECT IP CALLS
Direct IP calling allows two parties, that is, a HT with an analog phone and another VoIP Device, to talk to
each other in an ad hoc fashion without a SIP proxy. This kind of VoIP calls can be made between two
parties if:
• Both HT503 and other VoIP Device (i.e. another Handytone ATA or Budgetone SIP phone or
other VoIP unit) have public IP addresses, or
• Both HT503 and other VoIP Device are on the same LAN using private IP addresses, or
• Both HT503 and other VoIP Device can be connected through a router using public or private IP
addresses (with necessary port forwarding or DMZ).
TO PLACE A DIRECT IP CALL:
1. Pick up the analog phone (or use the speakerphone),
2. Access the voice menu prompt by dial “***”
3. Dial “47” to access the direct IP call menu
4. At voice prompt “Direct IP Calling” and dial tone, enter a 12-digit target IP address to
make a call.
Destination ports can be specified by using “*4” (encoding for “:”) followed by the port number.
Grandstream Networks, Inc. HT503 User Manual Page 10 of 35
Firmware 1.0.0.6 Last Updated: 6/2007