Yeastar made P-Series V24.1 generally available for the Cloud Edition on 14 May 2026, as firmware 84.23.0.24. The new features arrived in the beta on 23 April (84.23.0.23-beta1); the GA build adds fixes. The main new feature is Onsite Proxy, which solves an old problem with cloud phone systems and desk phones. Everything below comes from Yeastar's release notes.
The problem Onsite Proxy solves
With a cloud PBX, your desk phones sit behind your office router and the PBX sits on the internet. Getting the two to talk reliably has often meant port forwarding, VPNs or careful router settings — and every open port is one more thing to secure. The recent toll-fraud advisory was a reminder of why fewer open doors is better.
How Yeastar Onsite Proxy works
You deploy Yeastar's Onsite Proxy software in the same subnet as the remote IP phones — for example on a small machine in a branch office. It then creates a secure channel between the PBX and those phones. Per the release notes:
- The phones can be auto-provisioned through the proxy.
- They're reachable over the internet as if they were on the local network, without complex port forwarding.
- A new "Onsite Proxy Error" event warns you when the connection between the PBX and the proxy drops, or when the proxy's resource use goes over set limits.
- New API calls let you list, add, edit and delete proxy instances, and query or reset a proxy's secret key.
Yeastar's V23.3 beta blog adds that the agent opens an outbound encrypted tunnel to the PBX, so no inbound firewall ports have to be opened.
A note on versions
That beta blog lists Onsite Proxy as part of V23.3. The Cloud Edition release notes, however, introduce it in 84.23.0.23-beta1 — that is, V24.1. For a Cloud Edition PBX, V24.1 is the version to go by. The release notes don't list supported phone models or other prerequisites; Yeastar's Onsite Proxy guides cover those.
Other changes in Yeastar P-Series V24.1
Calls and extensions
- "Busy" forwarding destination: rejects the call with a busy signal (SIP 486). The existing "Hang Up" option under When Busy now returns 480 instead.
- Ringback tone per extension: callers hear a chosen tone before the extension answers.
- Several transport protocols per extension (UDP, TCP, TLS). In the GA build, existing extensions keep their transport settings and new extensions default to UDP only.
- Longer extension numbers: up to 11 digits.
- Linkus login with the extension number, if the admin allows it.
- Avatars can be uploaded when creating or editing extensions, and synced from Active Directory.
Trunks and phones
- SIP REFER on trunks: the trunk can handle blind transfers, to internal numbers, external numbers or both.
- Encrypted provisioning files for Yealink phones.
- 48 kHz Opus audio from IP phones.
- A fix for one-way audio after about 15 minutes on SRTP calls over outbound trunks.
Queues and voicemail
- Queue call-log permissions: managers can view and delete answered-call logs; agents see their own or all agents' logs, as configured. Deleted logs stay in the CDR.
- Forward voicemails to one or more colleagues from Linkus (Desktop 1.22.4 or later, and recent mobile versions).
Messaging
- An option to allow or prevent duplicate active SMS and WhatsApp sessions with the same contact, and better filters and transfers in the external chat logs.
Who Onsite Proxy is for
Onsite Proxy is about desk phones in places other than the main office:
- Branch offices with a handful of IP phones and no IT staff on site.
- Home workers who prefer a real desk phone over a softphone.
- Shops, surgeries or warehouses where a VPN to the PBX would be overkill.
If your team only uses the Linkus apps on computers and mobiles, this isn't the feature for you. And if all your phones sit in one office that already connects cleanly to the PBX, you may not need it either. Where it shines is the setup that used to need a router change at every site.
What this means for you
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. Existing extensions keep their settings.
If you have desk phones in a branch office or at home, Onsite Proxy is worth a look. Running the proxy in your own network is part of your setup — your IT partner or our support packages can help — and before you plan around it, ask our support whether it's available for your PBX.