Yeastar Phone System UK: P-Series Features & Costs

What Makes Up a Complete Yeastar Phone System?

Yeastar P-Series is the part of a business telephone service that manages users and extensions and decides how calls are handled. Yeastar calls this an IP PBX. The organisation normally needs additional services to connect those extensions with people calling from ordinary UK landlines and mobiles.

The core relationship is PBX + endpoints + trunks. Yeastar’s own getting-started documentation uses those three components to explain a working phone service. A PBX sets the call rules; an endpoint is where somebody answers; a trunk carries outside calls through a telecommunications provider.

System diagramHow a Yeastar phone system works in a UK business

For instance, a small consultancy might keep one published main number, give individual staff extensions, and answer calls through Linkus at the office or while working remotely. The P-Series routes the calls; the carrier provides the external connection; the business or its partner maintains the account and availability. This is an illustrative use case, not a claim about an installed customer.

What Can Staff Do on a Yeastar P-Series System?

Yeastar positions P-Series as business calling with additional unified communications and customer-handling functions. Which features are usable depends on the edition, active plan, licences, available integrations and configuration. A feature shown on the product website should not be interpreted as included in every system.

User and admin viewOffice dashboard, user calling tools and system management

Do not assume an advertised integration connects two products without configuration work. For example, a CRM screen-pop or Microsoft Teams telephone workflow may involve separate subscriptions, supported user identities and integration conditions.

Yeastar P-Series Appliance, Software and Cloud Editions

P-Series is a product family rather than one mandatory hosting arrangement. A UK business may encounter a dedicated appliance, a software PBX installed on infrastructure chosen by the organisation or partner, or a cloud service supplied through Yeastar’s channel ecosystem.

The practical first question is whether you have a person or provider responsible for the underlying PBX. The more detailed decision between a cloud instance, a software deployment and an on-site appliance belongs to a separate deployment-choice guide; it is not a reason to duplicate the entire discussion here.

Business communications viewYeastar business communications dashboard overview

How Many Users and Calls Do Yeastar Appliances Support?

Do not size a telephone system by employee count alone. A user or extension represents someone or a configured line on the PBX; a concurrent call is a conversation or call leg that consumes active system capacity. Hardware specifications, enabled expansion services and carrier channel limits are separate checks.

How Does Yeastar Licensing Work, and What Will a UK System Cost?

A Yeastar quote is not necessarily a single monthly price per employee. The cost depends on the edition, hardware or hosting, subscription and service entitlements, expansion, carrier, UK numbers, equipment, installation and support.

Basic, Standard, Enterprise and Ultimate are not interchangeable

Yeastar’s current documentation describes a basic telephony offering included with P-Series appliances, alongside Standard, Enterprise and Ultimate appliance plans. It lists Enterprise and Ultimate for Software and Cloud Edition arrangements. Service add-ons and their eligibility vary between product lines. Some functions also require minimum PBX firmware versions; verify entitlement using the current Yeastar purchase overview.

Request the full first-year and ongoing cost

Use this comparison: first-year total = PBX/licence + hosting/hardware + carrier/number/call charges + implementation + support + applicable VAT. Calculate recurring years separately, removing genuinely one-off expenses and adding renewals. There is no reliable single UK Yeastar price that applies to every reseller, edition and configuration; this guide therefore does not invent one.

UK SIP Trunks, Phone Numbers and Porting with Yeastar

Most businesses will need a UK-capable telecoms provider to carry external calls. Yeastar documents connection to an internet telephony service provider (ITSP) and publishes compatibility guidance, but an integration listing does not prove that all UK numbers, tariffs and emergency-location obligations are covered by the quoted service.

• Number inventory: record the main number, every direct-dial number, branch numbers and any numbers used by legacy connected equipment.
• Porting: ask who takes responsibility for the port, eligibility checks, fallback and completion date. Do not cancel the existing number service prematurely.
• Outgoing identity: agree which verified UK caller number is presented to recipients and whether different locations or departments need different identity.
• SIP capacity: check the provider’s external channels and calling restrictions separately from PBX concurrent-call capacity.
• Compatibility: confirm the supported trunk registration model, encryption, DTMF, codecs and vendor-verified deployment steps with the integrator.
• Continuity: establish what happens to incoming numbers if your PBX or primary internet connection is unavailable.

UK call path visualUse a clear diagram when explaining SIP, numbers and routing

For wider number selection, geographic versus non-geographic numbers and direct dialling, use our UK business phone numbers guide. For the transfer process itself, our number-porting guide owns that topic.

999/112 Calling and Power-Failure Planning on Yeastar

A configured Yeastar extension does not automatically demonstrate safe and reliable UK emergency calling. The end-to-end path includes the registered endpoint, available network and power, PBX emergency routes, active carrier service, the caller’s telephone number and the emergency location data supplied by the relevant communications provider.

Yeastar’s current emergency-calling documentation makes the role of an emergency outbound route explicit: a registered phone and at least one appropriate trunk are needed. It also highlights that emergency location for wireless devices and softphones may rely on the emergency caller-ID arrangement configured for that user. Read the Yeastar emergency-calling overview.

Agree with the carrier how emergency-call validation will be conducted. Do not make unnecessary live calls to 999 or 112 as a routine test. Provide an alternative contact route for staff if the business calling service is unavailable.

Who Secures, Supports and Maintains Yeastar?

Although Yeastar supplies the PBX technology, administration and availability depend on the actual contract. In a self-managed Software Edition, the business or its IT partner needs to maintain the hosting environment. A reseller-managed appliance may shift some work to the partner without shifting every responsibility. A hosted cloud service still needs a named support contact and incident process.

For telephone-call monitoring and recordings, the UK’s Information Commissioner’s Office says that routine recording or monitoring of all calls is not usually proportionate. Staff and callers need appropriate information and the business should evaluate necessity and its data-protection duties. See ICO guidance on monitoring calls.

Yeastar Phone System Readiness Checklist

Use this to brief an IT partner or Yeastar supplier before commissioning a system. It is focused on P-Series components and ownership rather than duplicating a generic VoIP installation plan.

• Record the precise P-Series edition, appliance model or cloud product being quoted and the supplier responsible for it.
• Count registered staff/extensions, external numbers and actual peak concurrent calls; allow capacity for seasonal demand.
• List existing phones, compatible SIP endpoints, Linkus devices and any hardware that cannot be reused without adapters.
• Agree the UK SIP carrier, external channel capacity, supported trunk template and inbound/outbound route test.
• Build an inventory of main numbers, DDIs, porting eligibility, caller ID and any legacy numbers supporting other devices.
• Request the exact plan tier and add-on list, including licence renewal, expansion limits and any AI/recording allowances.
• Assign a named owner for 999/112 access, location data, remote-worker changes and an independent emergency fallback.
• Confirm who maintains firewall, firmware, administrator permissions, monitoring, backups and restore tests.
• Ask for one documented quote covering appliance or hosting, PBX licence, trunk, numbers, calls, devices, setup, support and VAT.
• Run representative acceptance tests for inbound and outbound calls, voicemail, app registration, transfers, office hours and user access.
• Schedule the number cutover only after the old/new provider handover, fallback procedure and escalation contacts are documented.

Once those system-specific questions are answered, use our VoIP setup guide for the general installation and testing sequence. For comparing the wider service specification and like-for-like supplier proposals, use the UK VoIP buyer’s guide.

Frequently Asked Questions About Yeastar Phone Systems

Official Sources and How This Guide Was Prepared

This independent guide uses published Yeastar product documentation and current UK regulatory guidance. We have not claimed hands-on testing of Yeastar devices, a commissioned provider installation, first-party customer interviews or exclusive UK tariff access. Vendor features, model capacities and entitlement conditions may change.

1. Yeastar — P-Series product overview, deployment arrangements and advertised functionality.
2. Yeastar — PBX, endpoints, trunks and external-calling setup.
3. Yeastar — P520/P550/P560/P570 hardware specifications and capacities.
4. Yeastar — edition plans, licensing and available add-on services.
5. Yeastar — Software Edition supported deployment methods.
6. Yeastar — emergency routes and location considerations.
7. Ofcom — general conditions, including emergency access and caller-location obligations.
8. Ofcom — emergency-services compliance programme, June 2026 update.
9. ICO — monitoring and recording workers’ telephone calls.

Editorial product and regulatory source review: 21 October 2026. This is a product-system educational guide, not a platform review, purchased-service recommendation, UK compliance certification or quote.

Practical takeaway: treat Yeastar as the call-control layer of a working business communications service. Confirm its edition, capacity, SIP connectivity, end-user devices and named operational responsibilities before treating any quote as complete.