Cloud PBX & Business Phone System
A hosted business phone system delivered from Dollu’s carrier core - extensions, auto-attendant, ring groups, recording, softphones and desk phones on numbers in 110+ countries, priced per seat.
110+
Countries for numbers
99.99%
Platform availability
2M+
Users connected
What is Cloud PBX & Business Phone System?
Dollu Cloud PBX replaces the on-premise phone system with a hosted platform that runs on the same carrier core we use to route billions of minutes a year. Every user gets an extension, a direct number if required, voicemail, presence and a choice of desk phone, softphone or mobile app. Calls in and out of the business traverse our own SIP trunks and interconnects rather than a third-party carrier, so we control the quality, the routing and the number inventory end to end.
The feature set covers what a modern business expects from a phone system: multi-level auto-attendant with time-of-day and holiday routing, ring groups and hunt groups, call queues with position announcements, call parking, transfer and barge, voicemail-to-email with transcription, on-demand and always-on call recording, and a company directory that follows the user across devices. Administrators manage all of it from a web portal; changes such as adding a seat or re-pointing an attendant menu take effect within seconds, without a site visit or a truck roll.
Because Dollu is also a numbering and carrier provider, your phone system comes with local, national, mobile and toll-free numbers in more than 110 countries on the same account, plus porting of existing numbers wherever regulation allows. A company with offices in Noida, London and Singapore can present a local identity in each market, route calls between sites as free internal extensions and give a single main number a follow-the-sun answering plan, all without buying trunks from three different operators.
Commercially the service is simple: a per-seat monthly price that includes the platform, the apps, standard features and a calling bundle, with hardware bought outright or rented, and no minimum term above twelve months for standard plans. The platform is geo-redundant across our PoPs, media is encrypted with TLS and SRTP by default, and the same 24×7 NOC that watches our carrier network watches your phone system.
Why choose Dollu for cloud pbx.
The advantages of buying from a carrier that owns its network, interconnects and operations - rather than a reseller.
Lower cost than an on-premise PBX
No PBX hardware, maintenance contracts or PRI circuits. A predictable per-seat price includes the platform, apps, standard features and a calling bundle, and you add or remove seats month by month.
Live in days, not months
Numbers, extensions and call flows are configured in the portal, phones auto-provision when plugged in, and existing numbers port in the background - most sites are live within a week.
Work from anywhere on any device
The same extension rings a desk phone, a desktop softphone and a mobile app simultaneously; calls hand off between devices mid-conversation and presence stays consistent everywhere.
One provider for the phone system and the numbers
Because Dollu holds numbers in 110+ countries and runs its own carrier interconnects, a new office in another country is a portal order rather than a new operator relationship.
Carrier-grade reliability and security
Geo-redundant clusters, encrypted signalling and media, fraud monitoring on outbound traffic and a 24×7 NOC - the same operational standards we apply to wholesale carrier traffic.
Capabilities in detail.
Everything included with Cloud PBX & Business Phone System - the platform features, options and controls you get from day one.
- 01
Extensions and dial plans
Two- to six-digit extensions, direct-dial numbers per user, inter-site short codes, outbound caller-ID rules per user or department, and class-of-service controls on international and premium-rate dialling.
- 02
Auto-attendant and IVR menus
Multi-level menus with recorded or text-to-speech prompts, dial-by-name and dial-by-extension, time-of-day, day-of-week and holiday schedules, and emergency override so a receptionist can re-route the main number from a phone.
- 03
Ring groups, hunt groups and queues
Simultaneous, sequential, round-robin and longest-idle ring strategies; queues with hold music, position and wait-time announcements, callback and overflow to voicemail, another group or a mobile number.
- 04
Voicemail-to-email and visual voicemail
Personal and group mailboxes delivered to email as audio with transcription, visible in the apps as a scrollable list, with PIN access from any phone and configurable retention.
- 05
Call recording
On-demand or always-on recording per user, group or number, with announcement prompts, pause and resume, encrypted storage, role-based playback and export to your own storage or a compliance archive.
- 06
Softphone and mobile apps
Desktop apps for Windows and macOS, mobile apps for iOS and Android with push-wake for inbound calls, and a WebRTC client in the browser - all sharing the same extension, contacts, presence and call history.
- 07
Desk phone provisioning
Zero-touch provisioning for Poly, Yealink, Cisco, Fanvil and Grandstream handsets and conference phones; devices download their configuration on first boot and firmware is managed centrally.
- 08
Global numbers and porting
Local, national, mobile and toll-free numbers in more than 110 countries assigned in the portal, with number porting, regulatory address registration and emergency-services routing handled per country.
- 09
Admin portal, analytics and APIs
Role-based administration, call detail records, live and historical dashboards on volumes, answer times and missed calls, and a REST API for MSPs and integrators to automate provisioning.
How it works.
From first conversation to live traffic - a tracked, engineer-led onboarding with a named owner at every step.
- Step 01
Design
We map your sites, users, numbers and call flows in a short workshop, agree the seat mix and hardware, and produce a porting and cut-over plan.
- Step 02
Provision
Your tenant, extensions, attendants and groups are configured in the portal. New numbers are allocated immediately and porting requests are submitted for existing ranges.
- Step 03
Cut over
Phones auto-provision when plugged in, users sign in to the apps, and ported numbers switch over on the agreed date with our engineers on a bridge for the migration window.
- Step 04
Manage
Add seats, change call flows and pull reports from the portal at any time. Your account manager reviews usage and cost quarterly and the NOC monitors the service around the clock.
SIP trunk vs ISDN PRI.
What changes when you move a PBX, contact centre or Teams estate from ISDN circuits to SIP - and why most estates never go back.
| Dimension | SIP trunkDollu recommends | ISDN PRI |
|---|---|---|
| Capacity per unit | Elastic - channels are added in software; burst capacity on demand for peaks | Fixed - 30 B-channels per E1 (23 per T1); a new circuit for every step up |
| Provisioning time | Hours to days over any existing IP connectivity | Weeks - physical circuit delivery, PBX card and installation visit |
| Resilience | Registration to multiple Dollu PoPs, DNS SRV failover, geographic redundancy without extra circuits | A single physical path unless a second circuit is installed and paid for |
| Media security | TLS signalling and SRTP media end to end; SBC-fronted | Physically separate circuit; no encryption in the protocol itself |
| Number portability | Numbers from 110+ countries on one trunk - ported in or newly issued; not tied to a location | Numbers tied to the local exchange and the circuit’s address; moving means porting |
| Cost model | Per channel or per concurrent call plus per-second usage; no circuit rental or install charge | Circuit rental plus per-channel plus per-minute usage; install and engineer charges |
| Future-proofing | Native to Teams Direct Routing, cloud PBX, CCaaS and voice APIs; ready for the ISDN switch-off | Being withdrawn - PSTN and ISDN switch-off programmes are under way in the UK, EU and elsewhere |
Who uses this and why.
Typical deployments across carriers, enterprises, platforms and contact centres.
SMBs replacing an ageing PBX
Retire the on-site box and ISDN lines for a hosted system with better features, no maintenance and a monthly per-seat price.
Multi-site and multi-country enterprises
One phone system across offices in several countries with local numbers in each, free inter-site calling and central administration.
Hybrid and remote teams
Give home-based staff a business number, a softphone and the same queues and presence as the office, without VPNs or forwarding to personal mobiles.
Professional services firms
Recording, voicemail-to-email and per-client caller-ID for law, accounting and consulting practices that bill time and need a record of calls.
Clinics and practices
Appointment lines with queues and callback, after-hours attendants and privacy-conscious recording for healthcare and dental practices.
Technical & commercial specifications.
Key parameters at a glance. Ask us for the full service description and SLA document.
| Seats | 5 to 10,000+ users per tenant; add or remove monthly |
|---|---|
| Endpoints | SIP desk phones, Windows/macOS softphone, iOS/Android apps, WebRTC |
| Numbers | Local, national, mobile, toll-free in 110+ countries; porting |
| Signalling and media | SIP over TLS; SRTP; G.711, G.722, Opus; T.38 via ATA |
| Call features | Auto-attendant, groups, queues, park, transfer, barge, recording |
| Recording retention | 30 days included; up to 7 years optional; export to your storage |
| Integrations | Microsoft 365, Google Workspace, Salesforce, HubSpot, Zoho; REST API |
| Availability | 99.99% platform SLA; geo-redundant across Dollu PoPs |
| Billing | Per seat per month; USD/EUR/GBP/INR; 12-month standard term |
| Support | 24×7 NOC; P1 response ≤ 15 min; named account manager |
How UC & Contact Centre is priced.
Cloud PBX, UCaaS and CCaaS are priced per seat per month with bundled or metered minutes; Teams Direct Routing per user; global numbers added at rental + usage.
We publish the model, not a public rate card - actual rates depend on destination, route class, volume and regulatory cost. See how every Dollu service is priced.
- Monthly or annual terms
- Metered or bundled minutes per seat
- Integrations and admin portal included
- Volume pricing above 100 seats
- Add global numbers at rental + usage
- Billing
- Seats invoiced monthly in advance; metered usage in arrears
- Commitment
- Monthly or annual; annual terms unlock better seat pricing
Cloud PBX - your questions answered.
The questions customers and carriers ask us most often before they interconnect. If yours is not here, our team answers within one business day.
Still have a question?
Ask our solutions teamRelated services.
Services customers commonly combine with Cloud PBX & Business Phone System.
Price a Cloud PBX for your business.
Tell us how many users and sites you have and which countries you need numbers in, and we will return a per-seat quote and a migration plan within one business day.
