qlingen.

Qlingen vs Avaya IP Office

SMB and mid-market PBX, on-premises or hosted · Avaya, United States

IP Office is Avaya's long-running PBX for small and mid-sized businesses, sold per user through partners with optional cloud delivery. Qlingen is a Avaya IP Office alternative you run on your own cloud: a multi-tenant phone system on FreeSWITCH with call queues, callbacks, a browser softphone, a mobile app, an AI assistant and a full REST API — deployed and managed on a server in your own cloud account from one panel.

Feature comparison between Qlingen and Avaya IP Office
Feature Qlingen Avaya IP Office
Where it runs Your own cloud account (Vultr, DigitalOcean, Hetzner, Linode, AWS, Google Cloud), deployed in one click On-premises or partner cloud
How you pay No per-user software fee: add seats without a new licence Per-user licences through partners
Several companies on one system Yes, built in: each tenant has its own numbers, users and settings No
Call queues Yes, with agent login, strategies and hold music Yes
Queue callbacks (press 0, keep your place) Yes, included Via contact-centre product
Position and estimated wait announcements Yes, included Partial
Browser softphone Yes, WebRTC in any browser Yes
Mobile app Yes, with push wake-up and colleague chat Yes
AI assistant that changes the setup for you Yes: ask in plain language, approve the plan, it runs No
REST API Yes, everything in the panel, per-tenant tokens Limited
Custom call logic Yes, your own FreeSWITCH XML with a safety allowlist Limited
Who holds your call data You do, on your server You do when on-premises

Why businesses choose Qlingen over Avaya IP Office

  • ✓Simple web administration you can use yourself rather than partner-only tools.
  • ✓No per-user licence keys to buy and manage.
  • ✓Multi-tenant, self-hosted and open to any SIP phone.
  • ✓AI assistant, REST API and queue callbacks included.

Where Avaya IP Office is strong

  • •Mature, feature-rich call handling and reliable hardware.
  • •Large certified partner base worldwide.
  • •Established contact-centre options.

Frequently asked questions

Is Qlingen a good alternative to Avaya IP Office?
Yes for most businesses. Qlingen covers extensions, ring groups, call queues, IVR menus, voicemail, conferences, time conditions, inbound and outbound routing, a browser softphone and a mobile app. IP Office is Avaya's long-running PBX for small and mid-sized businesses, sold per user through partners with optional cloud delivery.
What does Avaya IP Office do better than Qlingen?
Mature, feature-rich call handling and reliable hardware. Large certified partner base worldwide. Established contact-centre options.
Where is Qlingen stronger than Avaya IP Office?
Simple web administration you can use yourself rather than partner-only tools. No per-user licence keys to buy and manage. Multi-tenant, self-hosted and open to any SIP phone. AI assistant, REST API and queue callbacks included.
Can I move from Avaya IP Office to Qlingen without losing my numbers?
Yes. Your numbers stay with your carrier, or you port them to any SIP trunk provider, and point the trunk at Qlingen. Extensions, ring groups and menus are recreated in the web interface or in bulk through the REST API.

Ready to see Qlingen on your own cloud?

Create an account, connect your cloud provider, and your first PBX server is about fifteen minutes away — then compare it with Avaya IP Office on your own calls. Every account starts with a 7-day free trial, no card required.

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