How voicemail detection works on Indian calls
In the first seconds after a call connects, the system listens for clues:
- A person usually says something short, "Hello?" or "Haan ji, boliye", then waits.
- A voicemail greeting is longer and one-way, and often ends in a beep.
- A network announcement is a recorded message from the operator, played when a phone is switched off, busy or out of coverage: "The number you are calling is switched off," or "Aap jis number par call kar rahe hain, woh abhi vyast hai."
A detector built for India has to recognise operator announcements like these as well as voicemail greetings.
There's a trade-off. Wait longer and the detector is surer, but a real person hears silence and may hang up. Decide too fast and the agent may start talking to a machine, or treat a person who answers with a long "Hello, haan ji, kaun bol raha hai?" as a recording.
Why it matters
Without detection, an agent talks to recordings. Minutes are wasted, the call is logged as a conversation that never happened, and the person may never get a real call. With detection, the call gets the right outcome and your campaign can try again later.
How Kallix uses it
Kallix agents detect voicemail and IVR menus. A call that reaches voicemail is logged with the voicemail outcome, not counted as a conversation. Set retries with gaps in the campaign to try again inside your calling window; retries count toward the per-person call limit.