Call Waiting
This function is applicable on FXS port for VoIP calls only. If the call waiting feature is enabled, the user
will hear a special stutter tone if there is another call on the line. Press the flash button to place the current
party on hold and switch to the other call. Pressing the flash button toggles between two active calls. The
HT503 also provides CWCID (call waiting caller ID) information which includes caller ID information in
addition to the special stutter tone. The analog phone must support this feature for it to work on the HT503.
Both call waiting functions (call waiting and CWCID) are activated and deactivated from the configuration
pages menu.
Call Transfer
The HT503 supports both blind transfer and attended transfer.
BLIND TRANSFER
This function is applicable using the FXS port for VoIP calls only. Assume that parties A and B are in
conversation. Party A wants to Blind Transfer Party B to C:
3. A presses FLASH on the analog phone to hear the dial tone.
4. Then A dials *87, then dials C’s number, and then presses #
5. A can hang up.
NOTE: “Enable Call Feature” has to be set to “Yes” in web configuration page.
ATTENDED TRANSFER
This function is applicable on the FXS port for VoIP calls only. Assume that parties A and B are in
conversation. Party A wants to Attend Transfer Party B to C:
1. A presses FLASH on the analog phone to get a dial tone;
2. A then dial C’s number followed by #.
3. If C answers the call, A and C are in conversation. Then A can hang up to complete transfer.