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Glossary · Dialing

What is Voicemail drop?

  • Also called: voice mail drop, voicemail blasting

Reviewed by Sujan ThapaliyaLast updated

Definition

A voicemail drop plays a pre-recorded message into a contact's voicemail after the greeting, letting the rep move to the next call instead of waiting for the beep. It is triggered by answering machine detection on a call the dialler actually placed.
The three STIR/SHAKEN attestation levels, which underpin how voicemail drop behaves in practice: A asserts both that the carrier knows the customer and that the customer may use the calling number, B asserts the customer only, and C asserts neither. A shared number pool can reach B at best, which is why number ownership keeps recurring in these definitions.
Attestation is the backdrop to most caller-ID and deliverability terms, voicemail drop included.

In practice

How voicemail drop actually works

The saving is larger than it looks. A voicemail left manually costs 30–45 seconds of dead time; at 60 no-answers a day that is roughly half an hour per rep, per day, recovered.

Voicemail drop is not the same as ringless voicemail. A drop happens on a real call that rang the phone; ringless voicemail inserts a message without ringing, and is regulated separately.

Callback routing decides whether drops are worth anything. If the number you leave is a shared pool number, the callback does not reach you, which is why owned numbers matter more here than message quality.

Drops also compound a reputation problem quietly. Every drop is a call placed, so the dial volume and short duration both feed the analytics score, while the conversation that would have justified the call never happens. On a number already under pressure, a drop-heavy campaign accelerates labelling rather than avoiding it.

Worked example

A rep leaving 40 voicemails a day at 25 seconds each spends about 17 minutes speaking into mailboxes, before the recovery time between attempts. A drop returns most of that, and the saving grows as the answer rate falls.

Voicemail drop: common questions

Is a voicemail drop the same as ringless voicemail?
No. A drop happens during a call that was actually placed and reached a mailbox. Ringless voicemail delivers into the mailbox without the handset ringing at all. The consent rules treat both as calls; the difference is mechanical, not legal.
How long should a dropped voicemail be?
Between 18 and 25 seconds. Shorter gives no reason to call back; longer gets deleted before the reason arrives. Whatever the length, the reason for the call has to land inside the first eight seconds, because that is where the listener decides.
Do consent rules apply to voicemail drops?
Yes. If you would need consent to call a number, you need it to leave a pre-recorded message in its mailbox. Do-not-call scrubbing, permitted calling hours in the recipient's time zone, and immediate opt-out handling all apply exactly as they do to a dialled call.

Sources

  1. Combating Spoofed Robocalls with Caller ID Authentication — Federal Communications CommissionThe STIR/SHAKEN framework, the attestation levels carriers sign calls with, and the mandate requiring providers to authenticate caller ID.
  2. 47 U.S.C. § 227 — Restrictions on the use of telephone equipment — Cornell Legal Information InstituteThe Telephone Consumer Protection Act itself — the consent requirements, calling-hours limits, and private right of action.
  3. ITU-T Recommendation E.164 — The international public telecommunication numbering plan — International Telecommunication UnionThe international number format, the 15-digit maximum, and how country codes and national numbers compose.

See voicemail drop in the product

A parallel dialer places several outbound calls at once for a single rep and connects the first one a human answers, dropping the rest. Because most cold calls go unanswered, dialling three to five lines in parallel produces several times as many live conversations per hour as one-at-a-time dialling.

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