Every new Dubai business setting up a physical office eventually faces the phone system question. Do you get a traditional PABX? A VoIP system? A cloud PBX? Do the existing desk phones plug in? Is VoIP even legal in the UAE? These are practical questions that deserve practical answers, not vendor pitches.
The options available in 2026 can be grouped into three categories. Each has different cost structures, maintenance requirements, and implications for a business operating in the UAE. Here is what each one actually means and when each makes sense.
For most small-to-medium Dubai offices (5–30 users), an on-premise IP-PBX (Grandstream or Yeastar) connecting to a du or e& SIP trunk is the best combination of cost, reliability, and TDRA compliance. Traditional analogue PABX is outdated and expensive to maintain. Cloud PBX suits larger or multi-location businesses. Consumer VoIP apps (Skype, WhatsApp) are restricted for business calls in the UAE and are not a reliable substitute.
The Three Options Explained
Option 1: Traditional Analogue PABX
The traditional private branch exchange — the box in the server room with copper phone lines running to each desk — is what most Dubai offices built before 2015 were using. It works reliably, but comes with real limitations: adding extensions requires a technician, hardware replacement parts are difficult to source, it cannot easily integrate with mobile phones or remote workers, and the carrier lines it relies on (PSTN copper lines from du/e&) are increasingly expensive and being phased out in favour of IP-based services.
If you are inheriting an older office space with an existing PABX, replacing it with an IP-PBX is usually more cost-effective over a 3-year horizon than maintaining the PABX — especially when factoring in the cost of adding new extensions and the monthly PSTN line rental.
Best for: Nobody setting up a new office. Existing installations that are working acceptably and the business is not planning any changes.
Option 2: On-Premise IP-PBX (VoIP)
An IP-PBX is a modern phone system that runs over your office data network (Ethernet/WiFi) rather than traditional copper phone lines. Instead of a phone per line, you connect desk phones (IP handsets) to your network switch, and the PBX software handles all the call routing. Calls to and from outside use a SIP trunk — a digital telephone line from du or Etisalat that connects over your internet connection.
The most common systems deployed in Dubai offices are Grandstream UCM (UCM6302A, UCM6304A), Yeastar S-Series and P-Series, and Avaya IP Office. These are physical appliances that sit in your server room or comms rack.
What you get: Extension dialling between desks, call transfer, voicemail-to-email, auto-attendant (IVR), call recording, call groups, and mobile app integration — all managed from a web interface without calling a technician for every change.
Cost structure: One-time hardware purchase (AED 1,500–6,000 for the PBX depending on capacity) + IP phones (AED 200–600 per handset) + SIP trunk subscription from du/e& (AED 300–600/month for 4–8 channels). No per-user monthly licence fee.
Best for: Dubai offices with 5–50 users operating from a single location who want a reliable, full-featured system without ongoing cloud subscription costs.
Option 3: Cloud PBX (Hosted VoIP)
A cloud PBX shifts the phone system software off a physical appliance in your office into a hosting provider's data centre. Your IP phones or softphone apps connect to the cloud PBX over the internet. The provider handles maintenance, updates, and uptime.
Cloud PBX providers available in the UAE include 3CX (which can be hosted on UAE cloud), Avaya Cloud Office, and several local SIP/hosted PBX providers. For international cloud PBX services, the UAE regulatory situation requires careful assessment — see the TDRA section below.
Cost structure: Lower upfront cost (no hardware PBX), but per-user monthly licensing (AED 80–200 per user/month depending on provider and features). At 10 users, over 3 years, cloud PBX is typically more expensive total cost than on-premise.
Best for: Multi-location businesses, businesses with significant remote workers, or companies that do not want any on-premise infrastructure to manage.
The UAE Regulatory Context (What Most Suppliers Don't Tell You)
This is where Dubai phone system advice gets complicated. The UAE telecommunications regulator (TDRA) imposes restrictions on VoIP that do not exist in most countries. Understanding this prevents a costly mistake.
What is legal:
- On-premise IP-PBX systems connecting to du or Etisalat/e& SIP trunks — fully legal and standard
- VoIP calls made through a du or e& corporate SIP trunk — fully legal
- Softphone apps provided by du or e& — legal
- Microsoft Teams voice calling through du/e& calling plans — legal
What is restricted or problematic:
- Consumer OTT VoIP apps (Skype, WhatsApp calls, FaceTime) for business voice calls over standard broadband — restricted
- Cloud PBX providers that route calls through international VoIP infrastructure bypassing UAE-licensed carriers — grey area to non-compliant
- International VoIP termination services that route around du/e& — not permitted
The practical implication: before deploying any cloud PBX system, confirm whether the provider uses du or Etisalat-licensed SIP trunks within the UAE to deliver calls. This is a question your cloud PBX vendor must answer clearly before you commit.
Side-by-Side Comparison
| Traditional PABX | On-Premise IP-PBX | Cloud PBX | |
|---|---|---|---|
| Upfront cost | Medium | Low–Medium | Very Low |
| Monthly cost | PSTN line rental | SIP trunk only | Per-user subscription + SIP |
| Remote working | Poor | Good (mobile app) | Excellent |
| Multi-location | Poor | Possible (VPN) | Excellent |
| TDRA compliance | Yes (PSTN) | Yes (du/e& SIP trunk) | Verify with provider |
| IT dependency | Separate cabling | Uses data network | Internet dependent |
| Power cut risk | Low (analogue lines) | Medium (UPS needed) | High (internet + power) |
| Recommended for | Legacy only | 5–50 users, single site | 30+ users, multi-site |
What About Power Cuts?
This is a real operational concern for Dubai offices. Traditional analogue PSTN lines carry their own power from the exchange — meaning your analogue PABX phones worked during a power cut as long as the copper line was intact. IP-PBX and cloud PBX phones require power and network — and if either fails, calls stop.
The correct mitigation for an IP-PBX system in a Dubai office is:
- A UPS (Uninterruptible Power Supply) on the PBX appliance and core network switch — this maintains operation for 20–60 minutes through most power interruptions
- Call failover configured in the PBX: if the PBX becomes unreachable, incoming calls automatically divert to the office manager's mobile
- For businesses where continuous call availability is critical (customer service teams, trading desks), a 4G SIM-based backup router to maintain internet connectivity if the fibre connection fails
For a related guide, read our article on setting up IT infrastructure for a new Dubai business — it covers UPS sizing and network reliability planning in detail.
Which System Is Right for Your Dubai Office?
- Under 15 users, single office, cost-conscious: Grandstream UCM6302A IP-PBX + Grandstream GRP2602 desk phones + du SIP trunk. Total hardware AED 5,000–10,000 once. No monthly licence.
- 15–30 users, single office, wanting modern features: Yeastar P550 or Grandstream UCM6308A + IP phones + du/e& SIP trunk. Total hardware AED 8,000–18,000 once.
- 30+ users or multiple Dubai offices: Cloud PBX from a UAE-compliant provider, or on-premise PBX connected via VPN between sites.
- Wanting to avoid IT complexity entirely: du or e& managed telephony services — they install and maintain, you pay monthly per user.
At SAS IT Services, our telephony service for Dubai offices covers the full deployment: system selection, du/e& SIP trunk coordination, structured cabling for data points, phone configuration, and staff training. We work with Grandstream, Yeastar, Avaya, and Poly systems, all through authorised UAE distributors.
If you are at the planning stage and want an honest recommendation for your specific office size and requirements, call or WhatsApp us at +971 52 886 7253. We will give you a straight answer — not a sales pitch for the highest-margin option.
Frequently Asked Questions
Is VoIP legal in Dubai?
Business VoIP connected to du or Etisalat/e& SIP trunks is fully legal and standard. What is restricted is consumer OTT VoIP (Skype, WhatsApp calls) for business calls, and cloud PBX providers that route through international VoIP infrastructure bypassing UAE-licensed carriers. Always verify your cloud provider uses UAE-licensed SIP trunks.
What is the best phone system for a 10-person office in Dubai?
For most 10-person Dubai offices, a Grandstream UCM6302A IP-PBX with GRP-series IP phones and a du SIP trunk. Hardware total AED 5,000–9,000. No monthly licence fee beyond the SIP trunk (AED 300–500/month). Full features including call recording, voicemail-to-email, auto-attendant, and mobile app.
Can I keep my existing desk phones when switching to VoIP?
IP phones (Cisco, Polycom, Grandstream IP handsets) generally work. Traditional analogue phones from a PABX cannot plug directly into an IP-PBX without an FXS adaptor — and at AED 200–400 for a new IP handset, replacing them is usually more practical.
What happens to phone calls if there is a power cut in my Dubai office?
IP phones and PBX appliances lose power and go offline. The mitigation is a UPS on the PBX and core network switch (gives 20–60 minutes), plus call failover to a mobile number configured in the PBX so incoming calls divert automatically if the system is unreachable.
How much does a VoIP phone system cost in Dubai?
On-premise IP-PBX for 5–10 users: AED 4,000–9,000 hardware + installation, plus AED 300–600/month SIP trunk from du/e&. For 10–30 users: AED 8,000–20,000 hardware + installation. Cloud PBX is lower upfront but AED 80–200/user/month ongoing. At 10 users over 3 years, on-premise is typically cheaper total cost.