A comparison with a deadline attached.
NEC is exiting its on-premises unified communications business outside Japan. For Australian sites the comparison is less about which system is better today and more about what replaces one that has a published end date.
Where the two systems differ on an SMB site.
Scope is NEC on-premises PBX aimed at SMB sites under 100 users, against Yeastar P-Series of comparable capacity.
| Capability | NEC | Yeastar P-Series |
|---|---|---|
| Licensing model | One-off hardware plus separate licences per service or feature. | One-off hardware plus three subscription plans. |
| SIP users and trunks | Licensed per SIP user and per SIP trunk. | No additional licence for SIP users or trunks. |
| Softphone clients | Three separate systems: ST500 mobile, SP310 desktop, InUC web. | One Linkus client family across mobile, desktop, web and a Chrome extension. |
| Client licensing | Per-user licences for ST500, with separate licences for InUC. | No additional client licence; client features follow the system. |
| SIP forking | One extension registers to one SIP device. | One extension across multiple IP phones with simultaneous client login. |
| Remote and off-premises access | VPN configuration required; ST500 requires additional SBC devices. | Remote access service without port forwarding or VPN. |
| APIs | No API feature. | Open APIs for third-party integration. |
| Microsoft Teams | No bespoke integration; direct routing via third-party middleware. | Bespoke Linkus for Microsoft Teams integration, with direct routing optional. |
| ITSP certification | No official ITSP certification programme. | Certified integration with mainstream ITSPs. |
| CRM integration | Outlook, Goldmine, ACT! | Outlook, Salesforce, HubSpot, Zoho, Odoo, SugarCRM and others. |
| Call recording and call flip | Not included. | Included. |
| Hardware architecture | Multiple independent blades and cards. | One compact cabinet with field-upgradable modular ports. |
Comparison drawn from Yeastar’s published competitive material. Competitor capabilities change; confirm the current position with the vendor before relying on any line of this comparison in a customer proposal.
The comparison matters less than the sequence.
If you hold an NEC base in Australia, the decision that carries risk is not which replacement wins on features. It is which sites move first, what happens to the analogue and ISDN connectivity attached to them, and whether the programme is spread across the available window or compressed into its last quarter.
Where partners use us most
- Reviewing the installed base and sequencing sites
- Mapping the NEC licence position to a Yeastar edition and plan
- Designing the analogue, ISDN and mobile transition
- Acceptance, fallback and hypercare per cutover
- Provisioning and escalation through the programme
Holding an NEC base in Australia?
Bring TeraFi the site list and the connectivity position. We will help set the order and the first validation step.
Fact-checked on 22 September 2026 against the Yeastar vs. NEC comparison, NEC Corporation of America’s on-premises UC end-of-life announcement and Australian NEC partner reporting of the local timeline. NEC product, portfolio, support and date positions should be confirmed against NEC’s own current statements. Comparison drawn from Yeastar’s published competitive material. Competitor capabilities change; confirm the current position with the vendor before relying on any line of this comparison in a customer proposal.