Call Transfer; 3-Way Conferencing - Grandstream Networks HT503 User Manual

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
conversation. Party A wants to Blind Transfer Party B to C:
3. A presses FLASH on the analog phone to hear the dial tone.
dials *87, then dials C's number, and then presses #
4. Then A
5. A can hang up.
NOTE: "Enable Call Feature" has to be set to "Yes" in web configuration page.
Three situations can follow the transfer:
1. A quick confirmation tone (temporarily using the call waiting indication tone) followed by a
dialtone. This indicates the transfer was successful (transferee has received a 200 OK from
transfer target). A can either hang up or make another call.
2. A quick busy tone followed by a restored call (on supported platforms only). This means the
transferee has received a 4xx response for the INVITE and we will try to recover the call. The
busy tone indicates the transfer has failed.
3. Busy tone keeps playing. This means we have failed to receive the second NOTIFY from the
transferee and the call has timed out.
Note: this does not indicate the transfer has been successful, nor does it indicate the transfer has
failed. When transferee is a client that does not support the second NOTIFY (such as our own
earlier firmware), this situation occurs. In bad network scenarios, this could also happen,
although the transfer may have been completed successfully.
Attended Transfer
This function is applicable on the FXS port for VoIP calls only. Assume that parties
conversation. Party A wants to Attend Transfer Party B to C:
1. A presses FLASH on the analog phone to get a dial tone;
then dial C's number followed by #.
2. A
3. If C answers the call,
4. If C does not answer the call,
NOTE: When Attended Transfer fails and A hangs up, the HT503 will ring user A back again to remind
A that party B is still on the call. Party A can pick up the phone to resume a conversation with party B.

3-WAY CONFERENCING

The HT503 supports Bellcore Style 3-way conferencing.
FIRMWARE VERSION 1.0.6.8
A and C are in conversation. Then
can press "flash" back to talk to B.
A
HT503 USER MANUAL
A and
A can hang up to complete transfer.
A and B are in
B are in
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