Effective October 2, 2025, the previous_id will be changed for multiple transfers in Outgoing Webhook (Call).

Scheduled date of change

October 2, 2025 (Thu) 

Description of Change

When multiple transfers occur during a call, the previous_id for the second and subsequent transfers will be changed.

Before Change:

・The previous_id of transfer calls is the sequence_id of the first answered call.

Example: Incoming Call > Transfer > Transfer

1. Incoming Call (sequence_id: A)
2. Transfer (sequence_id: B, previous_id: A)
3. Transfer (sequence_id: C, previous_id: A)

After Change:

・The previous_id during a transfer is the sequence_id of the previous transfer source call.
(From the second call onwards, the previous_id will be the sequence_id of the previous call, not the initial call.)

Example: Incoming Call > Transfer > Transfer

1. Incoming Call (sequence_id: A)
2. Transfer (sequence_id: B, previous_id: A)
3. Transfer (sequence_id: C, previous_id: B)