Switching from ADSL to Fiber Optic: Benefits and Costs for Businesses
By 2026, major network operators in Vietnam will have stopped developing new ADSL subscribers and are accelerating the process of completely phasing out this technology within the next 12–18 months. For businesses still using ADSL connections with speeds of 8–24Mbps, the question is no longer "should we upgrade?" but "when should we switch?" before the old infrastructure is completely shut down.
This article provides a detailed analysis of the differences between ADSL and FTTH fiber optic internet , compares the costs of popular business packages from VNPT, Viettel, and FPT, and guides you through the conversion process to ensure uninterrupted business operations.
Why is ADSL Coming to an End?
ADSL (Asymmetric Digital Subscriber Line) was the dominant technology for nearly 20 years, transmitting signals over telephone copper wires. However, the copper infrastructure is severely degraded, maintenance costs are high, and bandwidth cannot meet the needs of modern businesses such as video conferencing, cloud storage, IP surveillance cameras, or centralized ERP systems.
- Aging copper infrastructure: Many copper cable lines have been installed for over 15–20 years, and transmission failure rates increase significantly over time and due to weather conditions.
- Physical bandwidth limitations: ADSL theoretically offers a maximum download speed of around 24Mbps, but upload speeds are limited to 1–3Mbps—insufficient for cloud data backups or streaming from multiple cameras.
- Network operators cease investment: VNPT, Viettel, and FPT have all announced plans to stop providing new ADSL services, prioritizing all resources for fiber optic infrastructure.
- Maintenance costs outweigh the benefits: For businesses, downtime due to faulty old copper lines can cause far greater damage than the cost of a one-time upgrade.
Technical Comparison: ADSL vs FTTH Fiber Optic
Criteria
ADSL
FTTH Fiber Optic Cable
Download speed
8–24 Mbps
100 Mbps – 1 Gbps
Upload speed
1–3 Mbps
Symmetrical (by downloading)
Latency (ping)
30–60 ms
3–10 ms
Stable in rainy/humid conditions.
Significant decline
Unaffected
Maximum distance
~5km from the switchboard
No significant limitations
Static IP support
Limited, high fees.
Popular, built-in
IP camera bandwidth
Maximum 2–4 low-quality channels
Dozens of Full HD/4K channels
Bandwidth: The Difference Is No Longer a Small Number
An ADSL connection with a 24Mbps download speed but only 1Mbps upload speed is completely "overwhelming" when a business needs to simultaneously: video conferencing for 4 departments, synchronizing accounting data to the cloud, and transmitting images from 8 surveillance cameras. A 1Gbps fiber optic package offers symmetrical upload speeds — meaning uploads are just as fast as downloads, completely solving this bottleneck.
Latency and Real-Time Experience
Fiber optic latency is typically only 3–10ms compared to 30–60ms for ADSL. For real-time applications such as IP PBX (VoIP), video conferencing, or remote camera control, low latency directly impacts call quality and user experience—minimizing buffering and audio interruptions.
Static IP for Businesses
Enterprise FTTH fiber optic cables typically offer the convenience and cost-effectiveness of assigning static IP addresses compared to ADSL. Static IP addresses are necessary for:
- Stable remote access to surveillance cameras.
- Operating internal servers, site-to-site VPN
- Configure IP PBX and dedicated email server.
- Connecting management software (ERP, POS) with other branches.
Comparison of Business Package Costs in 2026
Network provider
Package
Speed
Estimated monthly cost
VNPT Business
FiberLink 150
150 Mbps
550,000 – 700,000 VND
VNPT Business
FiberLink 300
300 Mbps
850,000 – 1,000,000 VND
Viettel Business
SME Fiber 200
200 Mbps
600,000 – 750,000 VND
Viettel Business
SME Fiber 500
500 Mbps
1,100,000 – 1,300,000 VND
FPT Telecom
Business Fiber F5
250 Mbps
650,000 – 800,000 VND
FPT Telecom
Business Fiber F8
1 Gbps
1,500,000 – 1,800,000 VND
The quoted price, excluding VAT, varies by region and promotional offers at different times. Compared to the previous ADSL business cost (typically 400,000–500,000 VND/month for a 16–24Mbps package), the basic FTTH package now has a similar price but offers speeds 6–10 times faster.
Hidden Costs to Note
- Initial installation fee: Usually 0–500,000 VND depending on the network provider's promotional program, may be free when signing a contract for 12 months or more.
- Static IP fee: Varies from 100,000–300,000 VND/month depending on the internet provider and the number of IPs.
- Modem/router equipment: Some packages require purchasing or leasing Wi-Fi 6 equipment if wider coverage is needed.
- Contract commitment: Most business packages require a 12–24 month commitment, with penalties for early cancellation.
The Process of Converting from ADSL to Fiber Optic
Step 1: Survey and Consultation on Service Packages
Technicians will survey the existing infrastructure and the number of devices that need to be connected (computers, cameras, IP PBX, POS) to advise on the appropriate bandwidth package — avoiding over- or under-purchase.
Step 2: Register and Wait for Cable Installation
Laying new fiber optic cables to a location typically takes 1–3 business days in areas with existing fiber optic infrastructure, and may take longer in areas without coverage.
Step 3: Install in Parallel, Do Not Cut ADSL Immediately
This is the most important step to avoid downtime: the new fiber optic cable is installed and tested for stable operation in parallel with the old ADSL line, without disconnecting the old service.
Step 4: Switch Devices and Configurations
- Reconfigure your router/firewall to redirect traffic to the new fiber optic link.
- Update static IP addresses (if applicable) on cameras, servers, and PBX systems.
- Check the connection of each group of devices in order of priority.
Step 5: Perform a Comprehensive Check and Cancel ADSL Service
After confirming that the entire system is operating stably on the new fiber optic line for 24–48 hours, proceed to cancel the old ADSL contract to avoid paying for two connections simultaneously for too long.
Safe conversion checklist:
- Survey the actual bandwidth requirements of all devices.
- Register for a data plan and static IP address (if needed) at least 3–5 days in advance.
- Install fiber optic cables in parallel, but do not disconnect ADSL.
- Testing speed, latency, and stability during peak hours.
- Reconfigure your router, cameras, and PBX to redirect to the new line.
- Monitor for stability for 24–48 hours before canceling the old ADSL connection.
- Back up your old network configuration for future reference.
Quang Duc's Network Infrastructure Transition Consulting Services
Quang Duc Telecommunications Electronics Co., Ltd. provides comprehensive support for businesses transitioning from ADSL to fiber optic:
- Survey your existing network infrastructure and advise on a suitable service package within your budget.
- Working directly with the network provider to expedite the installation process.
- Configure router, firewall, static IP, and all internal network devices.
- Monitor the transition process to ensure minimal downtime.
- Post-migration technical support, prompt troubleshooting of any issues that arise.
Quang Duc's technical team has successfully assisted dozens of businesses in migrating their network infrastructure without disrupting business operations.
Conclude
With ADSL being phased out by network operators, switching to FTTH fiber optic cable is no longer an option but a necessity for businesses to maintain stable operations. Current package costs are reasonable, while the benefits in speed, latency, and stability are far superior to the old technology.
Don't wait until your ADSL connection is suddenly cut off to find an alternative. Contact Quang Duc today for a free survey and consultation on the most suitable fiber optic internet package for your business.
Hotline: 0903 306 126 (Mr.Vũ Trần) | Website: cameraquangduc.vn
