Round one: the full list
The AI persona, branded as the ISP's own assistant, dialled 733 numbers from the 1,054 on up to ten lines, connected with 37% of them, and had 190 real conversations about the upgrade: what Wi-Fi 6 is, what it costs, whether their plan qualifies, when a technician can come. The first classifier counted 201 leads, which turned out to be generous: it treated any call over 30 seconds with several turns as a positive outcome, including silent and confused ones.
Fixing concurrency and pronunciation
Two engineering problems surfaced on day one. Unanswered calls stayed 'pending' for five minutes and silently occupied dialling slots, so a '10 concurrent' campaign was really running one to three calls; a reaper now frees slots immediately. And 'Wi-Fi 6' was being spelled out letter by letter by the voice; writing it as 'WiFi Six' and 'router' as राउटर fixed the pronunciation.
Round two: 720 numbers with honest scoring
The retry round combined 463 no-answer numbers and 257 earlier conversations worth re-engaging. 32% connected, 230 answered, and the AI reported its own outcome at the end of each call (interested, call back, not interested, existing customer, consent withdrawn) instead of a duration heuristic.
| Round one | Round two | |
|---|---|---|
| Numbers dialled | 733 | 720 |
| Connect rate | 37% | 32% |
| Conversations | 190 | 230 answered |
| Leads | 201 (over-stated) | 100 (43% of answered, verified) |
The ISP received a live report page listing every call with its result, sentiment, transcript, summary and recording, with a campaign selector for both rounds.
What the grading showed
We had an independent model grade a random sample of calls. Short, clear calls (a deferral, an existing customer, a consent question) scored 8–10 out of 10. Calls with technical questions or ambiguous or silent lines scored 2–5, and some long calls were the AI repeating itself rather than engaging. That drove the next prompt revision: answer the question asked, handle 'hello? I can't hear you' with a short confirmation, and stop saying 'I didn't catch that' when the line is simply quiet.
What happened next
The ISP has since asked for an outbound AI calling system of its own for its call centre; procurement is under way. Solutions by industry →