How to Set Up a VoIP System in Bangladesh: Complete Guide 2025

Cut Your Phone Bills by 70% — Here's How

Businesses in Bangladesh are still overpaying for traditional landlines. VoIP — Voice over Internet Protocol — delivers the same quality calls over your internet connection at a fraction of the cost.

According to BTRC data, Bangladesh's broadband subscriptions are growing over 25% year-on-year. The infrastructure is ready. The question is — are you?

This guide covers everything you need: 

• legal requirements 

• hardware 

• SIP trunking 

• call center setup

• real costs in BDT

What Is VoIP? 

VoIP converts voice signals into digital data and sends them through the internet. No copper wires. No expensive per-minute carrier rates.

Key terms you need to know:

1. SIP — the protocol that manages VoIP calls

2. SIP Trunk — a virtual phone line connecting your system to real phone networks

3. PBX — your internal call switchboard

4. Softphone — a software app that works like a desk phone (Zoiper, MicroSIP)

5. BTRC — Bangladesh Telecommunication Regulatory Commission

Explore Complete Beginner Guide: What is VoIP & IP Phone Service in Bangladesh

Is VoIP Legal in Bangladesh?

Yes — for business use. Internal calls, customer service, and BPO operations are fully permitted.

What is illegal: terminating international calls through unlicensed gateways. This violates the Bangladesh Telecommunication Act 2001 and BTRC regulations. Penalties are serious.

Always use licensed IGW operators for international traffic — BTCL, Ranks Telecom, or Summit Communications.

What You Need Before You Start

Internet Connection

This is your foundation. Each concurrent call needs roughly 100 Kbps of stable bandwidth. A 10-agent team needs at least 2–3 Mbps dedicated to voice traffic alone.

Use a business fiber plan with a written SLA from BTCL Broadband, Grameenphone Enterprise, or a local fiber ISP. Avoid shared broadband — it kills call quality.

Hardware

• IP Phones — Yealink T-series or Grandstream GXP (available in Elephant Road, Dhaka)

• ATA Adapter — converts your existing analog phones to VoIP

• Headset + PC — cheapest option using softphone apps

• QoS Router — Mikrotik routers are widely used in Dhaka and support voice traffic prioritization

Software

• FreePBX — free, open-source, best for most businesses

• 3CX — commercial option with easier setup and support

• Zoiper / MicroSIP — free softphone clients for agents

Step-by-Step: How to Set Up a VoIP System in Bangladesh

Step 1 — Install Your PBX

Install FreePBX on Ubuntu Server 22.04. Use a local server or a cloud VM — a Singapore-region node gives you the lowest latency from Bangladesh.

Step 2 — Get a SIP Trunk

A SIP trunk connects you to real phone numbers. Your options:

• Local: BTCL VoIP, Ranks Telecom

• International with BD termination: Twilio, Telnyx, VoIPms

Compare per-minute rates and concurrent channel limits before choosing.

Step 3 — Configure the SIP Trunk

In FreePBX, go to Connectivity → Trunks → Add SIP Trunk. Enter your host address, username, and password to complete the setup. Use G.711 ulaw or alaw codecs — they work best on Bangladesh network conditions.

Step 4 — Set Up Agent Extensions

Go to Applications → Extensions. Create a SIP username and password for each agent. Install Zoiper on their PC and register using your server IP and extension credentials.

Step 5 — Build Call Queues and IVR

Set up an IVR menu for inbound routing. Create queues for sales, support, and billing. Add hold music. Test internal calls before opening external lines.

Step 6 — Enable QoS on Your Router

Prioritize SIP and RTP traffic in your Mikrotik or other router settings. This keeps call quality stable even when staff are browsing or downloading in the background.

Step 7 — Test Before Going Live

Measure your MOS (Mean Opinion Score). Aim for 4.0 or above. Keep the latency to your SIP server under 150ms. Use PingPlotter to diagnose any issues before launch day.

Can You Create Your Own SIP Trunk?

Yes. Many businesses in Bangladesh do this.

For internal calls only — you can fully self-host using Asterisk or Kamailio. Zero cost. No provider needed. For outbound calls to real mobile or landline numbers, you still need a licensed carrier for PSTN termination. You cannot bypass this step legally.

If you plan to resell SIP trunks as a service to others, BTRC authorization is required.

How to Start a Call Center in Bangladesh

Bangladesh is one of South Asia's fastest-growing BPO destinations. Competitive labor costs, rising English proficiency, and government support under the Smart Bangladesh initiative make it an attractive market.

Legal Requirements

1. Business registration with RJSC

2. Trade license from your City Corporation (Dhaka North/South or Chittagong)

3. TIN certificate and VAT registration

Technical Requirements

1. Dedicated fiber broadband with SLA guarantee

2. FreePBX or 3CX PBX system

3. SIP trunk with inbound DID numbers

4. Call recording and monitoring tools

5. CRM integration (Zoho CRM or HubSpot)

6. UPS and generator backup — non-negotiable in Bangladesh

   
   

Know Which One Actually Works: Cloud Call Center vs Traditional Call Center

Estimated Costs (2025)

A 5-seat startup can go live for under BDT 1.5 lakh total hardware cost.

Complete Cost Guide in 2026: VoIP Price in Bangladesh

Frequently Asked Questions

Is VoIP legal in Bangladesh?

Yes. Internal calls, customer service, and BPO operations are fully legal. Unauthorized international call termination via unlicensed gateways violates the Bangladesh Telecommunication Act 2001.

Can I create my own SIP trunk?

Yes, for internal calls — self-host with Asterisk or Kamailio at zero cost. For calls to real phone numbers, you need a licensed carrier for termination.

What internet speed do I need?

Budget 100 Kbps per concurrent call. A 10-agent center needs at least 2–3 Mbps dedicated to voice. Enable QoS and keep packet loss below 1%.

Which PBX is best for small businesses in Bangladesh?

FreePBX for budget setups — free and highly capable. 3CX, if you want commercial support and an easier interface.

How long does a call center setup take?

A 10–20 seat center typically takes 2–6 weeks from decision to go-live, depending on hardware procurement and registration speed.

What is the cheapest way to start VoIP in Bangladesh?

FreePBX on a spare PC, a budget international SIP trunk, and Zoiper softphones on existing laptops. A 5-seat team can launch for under BDT 20,000.

Need help setting up your VoIP system in Bangladesh? Get expert setup and support today.

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