Building call routing on a PBX has traditionally meant forms: an IVR here, a time condition there, a ring group at the end, each configured on its own page. It works, but it's hard to see the whole journey a caller takes. Yeastar's P-Series Cloud Edition 84.19.0.110, released on 7 July 2025, adds a visual way to build it — and Yeastar's first built-in AI tools.
What's new in Yeastar 84.19.0.110
Yeastar's release notes list three new features:
- Call Flow Designer (CFD) — a drag-and-drop builder for call workflows.
- AI Text-to-Speech — greetings and prompts generated from typed text.
- AI Voicemail Transcription — voicemails delivered as readable text.
The release also adds:
- Queue feature codes to log in or out of all queues, or back into the last queues used.
- A default status for dynamic agents when they join a queue.
- Number filtering that strips special characters from dialled numbers before they go to the trunk.
- A voicemail access number that users can dial, which can appear in the Linkus welcome email.
- HTML editing for welcome, system and notification emails.
- Bulk delete for company contacts, and number matching that can ignore symbols and letters.
- Transcription usage alerts at 90% and 95% of the minute allowance, and a Transcription Usage Details report.
How Call Flow Designer works
Call Flow Designer lets you build a call's path on a canvas. You drag in components, set them up and connect them. Yeastar's press release names component types such as prompt, user input, transfer, record and developer components, and says no programming is required.
It also mentions:
- ready-to-use templates for common flows,
- import and export of call flows, and
- batch configuration for resellers who look after many PBXs.
What you can build with it
Yeastar's own examples:
- an IVR that routes by time of day, language and other factors,
- routing based on customer data from an external database, and
- password-protected call flows.
A role setting controls who may open and manage Call Flow Designer, so you can keep it to the people who own your routing.
Getting started without breaking anything
- Draw your current routing first, on paper or a whiteboard: which number goes where, at what times, and what happens when nobody answers.
- Start from a template where one fits, rather than an empty canvas.
- Test on a spare number or an internal extension before you point your main number at a new flow.
- Keep it short. A flow that's easy to read on the canvas is usually easier for callers too.
Good routing still comes down to design, not tools. Our guide to IVR best practices covers how to build menus that callers get through quickly.
AI Text-to-Speech: greetings without a microphone
Recording prompts is one of those jobs that never quite gets done. With AI Text-to-Speech, you type the text and the PBX generates the audio. No recording session, no uploading files, and changing a greeting is a matter of editing a sentence.
In Linkus Web, users can generate their own greetings for voicemail and call forwarding too — once the admin has switched the feature on.
AI Voicemail Transcription: read instead of listen
AI Voicemail Transcription turns voicemail audio into text. Users can skim a message in seconds rather than play it, and choose their transcription mode and languages in Linkus. The admin switches it on and decides which extensions may change those settings.
Transcription is counted in minutes. The new alerts and the usage report help you see how many you're using.
What came after
Both halves of this release kept growing:
- 84.20.0.128 (October 2025) added neural voices to text-to-speech, and variables and timeouts to Call Flow Designer's prompts.
- V23.1 (March 2026) brought more Call Flow Designer improvements, such as timeout branches for HTTP and database steps and new JSON functions.
- V25.3 (October 2026) added Send SMS and Send WhatsApp-template components.
For transcription of live calls, see AI call transcription, which arrived in September 2025.
On PBXfactory
On a Yeastar P-Series Cloud PBX from PBXfactory, Yeastar's updates are applied for you in announced maintenance windows, and urgent security fixes sooner.
AI features run on minutes, and some need a Yeastar add-on. We won't promise what we can't check here: ask our support whether a given AI feature is available for your PBX.
Designing call flows is PBX configuration, which isn't part of included support. Yeastar's documentation explains each component; if you'd like help, your IT partner or one of our paid packages can step in — Setup Assist, for example, is €299 one-time per PBX (excl. VAT). Details are on the support page.