Calls don't always get answered. K3X handles the misses for you with configurable voicemail, automatic transcription, missed-call alerts, and Agents that can react to either.
What "missed" means in K3X.
A call counts as missed when none of the configured ringing destinations pick up within the ring window (default 30 seconds). What happens next depends on the number's fallback rule:
Voicemail — the call rolls to your configured greeting and the caller can leave a message.
Forward — the call forwards to a configured external number (e.g. an answering service or a personal cell).
Hang up — the call ends with no voicemail and no forwarding. Caller hears the standard "call cannot be completed" message.
Set this per number from Settings → Phone Numbers → [number] → Inbound → If no answer.
Voicemail greetings.
Three options:
Default greeting — "You've reached [business name]. Please leave a message after the tone." K3X reads it in text-to-speech using the business name from your org settings.
Custom text — type your own message. K3X reads it with a configurable voice and accent (US-female by default).
Custom audio — upload an MP3 or WAV file (max 5 minutes). Best for businesses that want a specific tone or a real voice.
Configure under the same Inbound settings page. You can also set different greetings for business hours vs after hours — useful for letting people know you'll respond next business day instead of within the hour.
Business hours and after-hours behavior.
Set business hours from Settings → Phone Numbers → [number] → Hours. Pick the timezone, the days, and the hours per day. After-hours calls can:
Go directly to voicemail (most common).
Forward to an on-call rotation.
Hear a different greeting ("We're closed; please call back Monday morning").
Trigger an Agent that does a callback queue ("Thanks for calling — we'll call you back at 9am Monday").
Voicemail transcription.
Every voicemail K3X receives is transcribed automatically and logged on the lead's activity feed alongside the audio. The transcript shows up in seconds (voicemails are short and processed fast), so you usually have the text before you have time to listen to the audio.
Voicemail transcripts work the same as call transcripts: searchable from AI Chat, readable by Agents, and editable if the speech-to-text got something wrong.
Missed-call alerts.
By default, the assigned user (or every user in a round-robin team) gets:
An in-app notification the moment the call is missed.
A desktop notification if browser notifications are enabled.
An email summary if the call went to voicemail — includes the transcript, audio link, and caller's lead profile.
Configure alerts per user under Settings → Profile → Notifications. You can turn off any channel — e.g. silence desktop notifications during deep work hours.
Agents on missed calls.
Agents can have a "missed call" trigger that fires whenever a call rolls to voicemail or otherwise goes unanswered. Common patterns:
Auto-text the caller. If a lead calls and you miss, an Agent texts them within seconds: "Sorry I missed your call! I'll be back at my desk at 2pm — happy to call you back then, or reply here." Conversion rates on this are surprisingly high.
Create a callback task. Add a task to the lead's owner with due date = today, priority = high.
Update lead status if the missed call is a meaningful signal (e.g. inbound call from a dormant lead → move back to Active).
Notify the team in Slack via the Slack integration when an inbound call from a high-value lead is missed.
Build these like any Agent: /agents/new, describe the goal, pick the missed-call trigger.
Listening to and managing voicemail.
All voicemails for your numbers live under the Voicemail tab in the dialer panel (bottom-right), plus on the relevant lead's activity feed. The tab shows:
Unread voicemails up top, read ones below.
Audio player, transcript, caller info, and the lead they belong to.
One-click Call back button.
Archive (hides from default view but doesn't delete) and Delete actions.
Marking a voicemail as read happens automatically when you play it or open the transcript.
Retention.
Voicemails follow the same retention policy as recordings (2 years default, configurable). Transcripts are coupled to the audio — deleting one deletes both.
Troubleshooting.
Voicemail doesn't pick up. Check the Inbound "If no answer" setting on the number — it might be set to Hang up. Also check the ring window isn't unrealistically long (>60s means the caller usually gives up first).
Caller hears the default greeting instead of mine. Custom greeting wasn't saved, or you're outside business hours and the after-hours greeting is what's playing. Check both.
Missed-call email never arrived. Check Settings → Profile → Notifications. Also check your spam folder — the first one sometimes lands there.
Transcript is mangled. Voicemail audio quality is often worse than live calls (mobile from a noisy environment). The transcript reflects the audio. Edit it inline if you'll want to search for it later.
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