Grandstream Networks HT503 User Manual page 84

Encode the MAC Address
1. Locate the MAC address of the device. It is the 12-digit HEX number on the bottom of the unit.
2. Key in the MAC address. Use the following mapping:
A: 22 (press the "2" key twice, "A" will show on the LCD)
B: 222
C: 2222
D: 33 (press the "3" key twice, "D" will show on the LCD)
E: 333
F: 3333
For example: if the MAC address is 000b8200e395, it should be keyed in as "0002228200333395".
NOTE:
1. Factory Reset will be disabled if the "Lock keypad update" is set to "Yes".
2. Please be aware by default the HT503 WAN side HTTP access is disabled. After a factory reset, the
device's web configuration page can be accessed only from its LAN port.
3. If the HT503 was previously locked by your local service provider, pressing the RESET button will only
restart the unit. The device will not return to factory default settings.
4. Please be aware if the RESET button was pressed and released in less than 7 seconds, the HT503 will
only reboot, it won't return to factory default settings.
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HT503 User Manual
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