The fundamentals, done properly: auto attendant and multi-level IVR, ring groups, hunt lists, time conditions and holiday routing, call parking, paging and intercom, busy lamp fields, call recording with pause and resume, voicemail to email, and the call flow control that lets a manager change how the phones behave from an app rather than raising a ticket. Numbers are not tied to a building, so a customer can move office without renumbering.
The PSTN switch-off completes in January 2027, and every ISDN and analogue line in the UK has to go somewhere before then.
Yeastar P-Series Cloud pairs with our AI Powered SIP Trunks, or run it on site with the P-Series Appliance.
What Is Yeastar P-Series Cloud?
Yeastar P-Series Cloud Edition is a hosted business phone system that puts unified communications and contact centre in the same platform, rather than selling them as two products that have to be made to talk to one another. Every customer gets their own PBX instance with its own numbers, extensions, call routing and reporting.
Users reach it from a web browser, from the Linkus app on a Windows or Mac desktop, from an iPhone or Android handset, or from a desk phone on the desk — the same extension, the same directory and the same call history on all of them. Nothing sits in the customer’s comms room, so there is no hardware to buy, no server to patch and nothing to fail on site.
Why Partners Sell Yeastar
Because it is quick to sell and quick to deliver. A new instance is created in minutes from Yeastar Central Management, goes live immediately, and can be branded as yours — portal, apps and system emails. Your customer sees your company, not ours.
It also scales in both directions. Take a three-user solicitor or a hundred-seat contact centre on the same platform, add and remove users as the customer’s year moves, and upgrade a plan without rebuilding anything. TruSIP is channel-only, so the customer, the contract and the margin stay with you.
Built for Service Providers
Most cloud phone systems are designed around the end customer and leave the reseller to work out the rest. Yeastar starts from the other end: the tools that let you provision, brand, monitor and bill a book of customers are part of the platform, not an afterthought.
Simplify Service Delivery
It only takes minutes, if not seconds, to create PBX with different capacities for your customers and the PBX will go live immediately. Your customers can then access and manage their phone systems right through the web.
Provisioning templates carry your standard build — extension ranges, call routing, voicemail behaviour, security policy — from one customer to the next, so the tenth deployment takes the same effort as the first and looks the same when the engineer hands it over.
The Right Set of Features
Optimised with the right set of features, ease of use and management, future-proof flexibility and adaptability, the P-Series Cloud unifies voice, video, applications, collaboration and more to facilitate boundless communications.
That matters commercially as well as technically. Call recording, queues, IVR, reporting, CRM integration and messaging all come from the same system, so there is no stack of third-party add-ons to buy, integrate, support and explain on the invoice.
Real-Time Monitoring
With Yeastar Central Management automatically monitoring the status of all your customers' PBX instances, you get instant alerts when threats, security-related risks, or any other critical system issues occur.
You find out before the customer does, which is the difference between a proactive call and an angry one. Scheduled tasks handle the routine work — backups, firmware, certificate renewals — across the whole estate rather than instance by instance.
Scale on Demand
It is clicks away to scale up and down services and upgrade subscription plans for various needs. There is literally no limit on instances and users.
Seasonal businesses can flex through a busy quarter and come back down again; a customer who wins a contract can be expanded the same afternoon. Because capacity is a subscription rather than a hardware purchase, growth costs you a change of plan, not a new install.
One Platform, Every Channel
Voice was never the whole job. These are the parts of P-Series Cloud your customers will actually use day to day.
Linkus UC Client
A feature-rich UC app for seamless collaboration. Available on web, desktop, and mobile. Stay connected anywhere anytime with call, meet, and chat.
Presence tells colleagues who is free before they ring. A live call can be flipped from the desk phone to the mobile mid-sentence, so nobody has to stay at their desk to finish a conversation.
Operator Panel
Gain real-time visibility into call flows and dispatch calls with an easy drag-and-drop interface.
The receptionist sees every waiting caller, every extension and every queue on one screen, and moves a call by dragging it. It is the feature that sells the system in a room full of people who currently use a paper list.
Call Centre Console
Equip agents and supervisors with useful tools like IVR, Operator Panel, Wallboard, and more.
Skills-based routing, queue callbacks, live wallboards, SLA monitoring and call dispositions come as part of the platform, so a customer can grow into a contact centre without buying a second system.
Remote Working
Work from anywhere and stay connected with secure remote access.
There is no VPN to build and no port forwarding to argue about with the customer’s IT provider. A home worker signs in to Linkus and has their extension, wherever they are.
Omnichannel Messaging
Go beyond just voice. Engage customers through SMS and WhatsApp messaging.
WhatsApp, SMS, Facebook and website live chat arrive in one inbox alongside calls, with clear agent assignment and the full history against the contact — so a conversation that starts as a message and ends as a call is still one conversation.
IP PBX Integrations
Integrate Yeastar IP PBX to collaboration tools, CRM, helpdesk, and more and enhance existing infrastructure.
Microsoft Teams and 365, Entra ID, Google Workspace, Salesforce, HubSpot, Dynamics 365, Zoho, Odoo, Bitrix24, Zendesk and more — plus an API and a CRM template for the system nobody has heard of.
Inside the Platform
P-Series Cloud is one system, not a bundle. Everything below is configured from the same web interface, reported on in the same place, and included in the subscription rather than licensed separately — though the higher-end capabilities sit on the higher plan tiers.
What a customer actually needs is usually obvious after ten minutes on site. Ask us and we will tell you which plan covers it.
One extension across a web browser, a Windows or Mac desktop app, an iOS or Android phone, and a Chrome extension that adds click-to-dial to any web page. Presence, company directory, call history, instant messaging and file sharing follow the user between them, and a live call can be flipped between devices without dropping. Linkus is included for unlimited users on every plan, which removes the usual argument about who is worth a licence.
Video calling and video conferencing run in the same client as the phone, so a call can become a meeting without moving to another product or sending anybody a link to a service they do not have. Screen sharing and guest access are built in. Video sits on the top plan tier — worth checking before you quote a customer who has assumed it is included everywhere.
Queues with skills-based and priority routing, queue callback so a caller keeps their place without holding, live wallboards on the office screen, a switchboard-style queue panel for supervisors, whisper, barge and listen for coaching, SLA thresholds, and disposition codes so a manager can see why people are ringing rather than only how often. The reporting that goes with it is in the platform, not a separate analytics purchase.
Progressive, power and agentless auto-dialling for teams that make calls rather than take them, with campaign management, contact lists, call outcomes and agent productivity tracking. It turns a sales or collections team from a room of people dialling by hand into something a manager can actually measure — and it is the feature that most often justifies the step up from a basic hosted phone system.
WhatsApp, SMS, Facebook Messenger and website live chat land in the same inbox as the calls, assigned to agents the same way, with the whole history kept against the contact. Bulk messaging is supported for the businesses that need to tell everybody something at once. For a lot of customers this is the reason to move: their clients stopped ringing years ago and started messaging.
Yeastar integrates with Microsoft Teams so users can make and receive external calls from inside the Teams client they already live in, without Microsoft calling plans. Alongside it, Microsoft 365 and Outlook keep contacts and calendars in step, and Microsoft Entra ID (formerly Azure AD) handles user provisioning and single sign-on so an account created once works everywhere. Google Workspace, LDAP and Windows Active Directory are supported too. Teams integration is a higher-tier feature — see our solutions page for the wider Teams options we can put in front of a customer.
Salesforce, HubSpot, Microsoft Dynamics 365, Zoho, Odoo and Bitrix24 on the CRM side; Zendesk and Zoho Desk on the helpdesk side. Click to call from the record, screen pop on an inbound call so the person answering already knows who it is, automatic call logging, and contact creation for numbers nobody recognises. Where a customer runs something bespoke, there is a CRM integration template and an open API to build against.
SRTP and TLS call encryption, two-factor authentication, enforceable password policy, a global anti-hacking IP blocklist, country and code allow-lists, outbound call frequency limits, automatic and static intrusion defence, and managed certificates. Yeastar is GDPR compliant and holds ISO 27001, ISO 9001 and ISO 14001 certification. Toll fraud is the risk that ends reseller relationships, so these are worth walking a customer through rather than leaving on a datasheet.
Advanced call detail records with custom reports, call accounting with your own rate tables for customers who cross-charge departments, and a data connector that streams call data live into PostgreSQL, MySQL or Microsoft SQL with ready-made dashboard templates. If a customer wants their call data in Power BI next to everything else they measure, it goes there rather than staying trapped in a portal.
Artificial Intelligence
AI in telecoms is usually a separate product with its own login and its own invoice. In the Yeastar P-Series it is part of the PBX, which means there is nothing to integrate and nothing extra for the customer to learn. AI usage is drawn from a minute allowance that can be topped up with on-demand packs or a monthly rolling plan, so a customer can start small and grow into it.
If you would rather apply AI at the trunk than at the phone system — so it covers every call regardless of platform — that is what our AI Powered SIP Trunks do.
AI Receptionist
Answers the call, greets the caller, handles questions from a knowledge base you build for the customer, takes the details it needs and routes the call to the right place — at three in the morning as readily as at eleven on a Tuesday.
Transcription & Summaries
Calls are transcribed into readable, searchable text as they happen, and a written summary lands the moment the call ends — key points, decisions and action items. Nobody has to listen back to a recording to find out what was agreed.
Voicemail to Text
Voicemails arrive as text as well as audio, so they can be read in a meeting or triaged on a phone. Text-to-speech generates prompts and announcements without booking a studio or re-recording every time the opening hours change.
Call Flow Designer
Build call handling by dragging components onto a canvas rather than nesting IVR menus in a settings tree. Complicated routing becomes something you can show a customer on screen, and change in front of them.
Yeastar Central Management
Take advantage of cloud technology with a centralised UCaaS platform. Yeastar Central Management, or YCM, is the console you work from rather than the one your customer sees — every instance you have sold, in one place.
From it you create and deliver new PBXs, apply provisioning templates so each build starts from your standard rather than a blank page, push firmware and configuration to phones remotely, watch the health of the whole estate, run scheduled tasks across it, and set white-label branding that goes live the moment you click save. It is the part of the platform that decides whether managing fifty customers is a business or a full-time job.
What You Get From TruSIP
Yeastar builds the platform. What you buy from us is the platform plus the things that make it sellable — and a UK team in Manchester who will answer the phone when a deployment does not go to plan.
Your Brand, Not Ours
White-label the portal, the Linkus clients and the system emails. We are channel-only and never approach your customer.
Live in Minutes
Create an instance, choose the capacity, apply your template. No build queue, no lead time, no engineer visit to book.
Trunks From the Same Place
Pair Yeastar with our own SIP trunks and the platform and the calls arrive on one bill, backed by one support number.
Training That Sticks
Yeastar training for your engineers and your sales people, so the knowledge lives in your business rather than in ours.
We’ll Build It If You Want
Installation and configuration services for the deployments you would rather hand over, delivered under your name.
Billing Handled
White label billing if you would rather not build an invoicing operation to sell a phone system.
Hardware
Yeastar makes your choice of phone integrate seamlessly with the P-Series Cloud Phone System.
The SIP Phones listed have been tested with the Automatic Provisioning features, enabling users to register, activate, and configure IP phones quickly and in bulk.
That matters more than it sounds. Auto-provisioning is the difference between an engineer plugging in forty phones and forty phones plugging themselves in — the handset finds its configuration, takes its extension, picks up the customer’s directory and the right firmware, and is ready before anyone has opened a laptop. It also means a replacement phone for a broken one is a five-minute job rather than a site visit.
Several hundred handset models across the manufacturers below have been tested, from single-line desk phones to DECT systems for warehouses and executive handsets with expansion modules. If a customer already has SIP phones on the wall, there is a good chance they can keep them.
Yealink
Fanvil
Avaya
Cisco
Snom
Poly
NEC
Gigaset
Grandstream
Mitel
Huawei
V-Tech
For a full list of supported manufacturers and models, please click here.
Cloud or On-Premises?
It is the same P-Series, with the same interface and very nearly the same feature set. The question is only where it runs — and it is worth asking properly, because the answer changes the shape of the deal rather than the product.
Choose Cloud when…
The customer has no comms room worth the name, or several sites and no obvious place to put a box. They want a monthly cost rather than a capital purchase. They have staff working from home who are never coming back full time. They are growing, or shrinking, and would rather not guess how big to buy. Or they simply do not want to own, insure, patch and eventually replace a piece of hardware to answer the phone.
This is most businesses, most of the time, and it is the option that keeps you in a recurring revenue relationship rather than a five-year gap between hardware refreshes.
Choose the Appliance when…
There are rules about where data may sit, or a compliance officer who wants the recordings in the building. There is a mass of analogue to keep alive — door entry, lift phones, fax lines, a paging system — and gateway ports are the tidy answer. The site is remote and the internet is not something anyone would describe as reliable. Or the customer’s finance director simply prefers to buy things.
Read about the Yeastar P-Series Appliance, including its modular card design, hot standby and two-factor authentication.
Yeastar P-Series Cloud: Common Questions
The questions partners ask us most often before their first Yeastar deployment.
What is Yeastar P-Series Cloud Edition?
Yeastar P-Series Cloud Edition is a cloud-hosted business phone system that brings unified communications and contact centre together in one platform. Each customer gets their own PBX instance, reached through a browser, the Linkus desktop and mobile apps, or a desk phone. There is no hardware on site and nothing for the customer to maintain.
Can I sell Yeastar under my own brand?
Yes. Yeastar Central Management includes white-label settings, so the management portal, the Linkus clients and the emails your customers receive can all carry your logo, your colours and your domain. TruSIP is channel-only and never sells to your customer, so the relationship and the billing stay with you.
How long does it take to provision a new customer?
Minutes. You create the instance in Yeastar Central Management, choose the capacity and the plan, apply a provisioning template if you have one, and the PBX is live immediately. There is no build queue and no engineer visit, so a customer can be quoted and delivered in the same day.
What is the difference between P-Series Cloud Edition and the on-premises appliance?
The platform and the feature set are the same; only where it runs differs. Cloud Edition is hosted and billed monthly per instance, with no hardware to buy. The P-Series Appliance sits in the customer’s comms room and suits sites with strict data-residency rules, heavy analogue or ISDN gateway requirements, or a preference for a capital purchase. Customers can move between the two.
Which phone systems and handsets does Yeastar work with?
Yeastar auto-provisions IP phones from Yealink, Fanvil, Snom, Poly, Cisco, Grandstream, Gigaset, Mitel, Avaya, NEC, Huawei and V-Tech, among others, covering several hundred tested handset models. Phones register, activate and configure in bulk rather than one at a time.
Does Yeastar integrate with Microsoft Teams?
Yes. Yeastar integrates with Microsoft Teams so users can make and take PSTN calls from inside the Teams client, and with Microsoft 365, Outlook and Microsoft Entra ID for contact synchronisation and single sign-on. Teams integration sits on the higher plan tiers — talk to us about which plan a given customer needs.
Can Yeastar use my existing SIP trunks?
Yes. P-Series supports a very wide range of SIP trunk providers, so you are not forced onto a particular carrier. Most TruSIP partners pair Yeastar with our own SIP trunks, which puts the platform and the calls on one bill with one support number, but the choice is yours.
What AI features does Yeastar include?
P-Series includes an AI Receptionist that answers calls, handles questions from a knowledge base you supply and routes the caller, plus AI call transcription and automatic call summaries, voicemail-to-text and text-to-speech prompts. AI minutes are consumed from an allowance, which can be topped up with minute packs or a monthly rolling plan.
What support do I get from TruSIP?
A UK team in Manchester that knows the platform, plus pre-sales help on live opportunities, Yeastar training for your engineers and sales people, installation and configuration services if you would rather we did the build, and white-label billing if you want the invoicing handled too. Our support pages have the detail.
Ready to get started?
Talk to our team about Yeastar P-Series Cloud, or ask us to walk you through a live instance.