Short answer: Dedicated Internet Access (DIA) is a business internet line that belongs to your organisation alone. The bandwidth is reserved for you (1:1, not shared with neighbours), upload and download speeds are the same (symmetrical), and the service comes with a Service Level Agreement (SLA) that sets out uptime, repair time and support. In Malaysia, DIA is usually delivered over fibre by a Tier-1 carrier, with bandwidth from about 10 Mbps up to 10 Gbps, a static IP address, and contracts that commonly run 12, 24 or 36 months.
DIA in one sentence
DIA is your own private lane to the internet: a dedicated fibre connection from your premises to the carrier’s internet gateway, with guaranteed bandwidth in both directions and a written service commitment.
Everything else in this guide is detail. If you already know you need DIA, see our dedicated internet access service in Malaysia or jump to how to buy DIA.
How DIA works
With ordinary broadband, your office shares the same network capacity with other homes and businesses in the area. When everyone is online at 10am, everyone slows down. DIA takes a different route:
- Dedicated access. A fibre circuit runs from your building to the carrier’s network and on to its internet gateway. The bandwidth on that circuit is allocated to you only.
- Native Ethernet over fibre. Most Malaysian DIA is handed over as an Ethernet port on a carrier router or network terminal in your server room or comms rack.
- Fixed public IP addressing. DIA includes a static IP address, and more fixed IPs can be requested for firewalls, VPNs or hosted services.
- Monitored and supported. The carrier (and, if you buy through a partner, the partner’s network operations centre) monitors the line and handles faults around the clock.
What makes DIA different from business broadband
| Dedicated Internet Access (DIA) | Business broadband | |
|---|---|---|
| Bandwidth | Dedicated, 1:1, not shared | Shared with other users |
| Upload vs download | Symmetrical (same both ways) | Usually much lower upload |
| Service commitment | SLA on uptime, repair time and support | Best effort, no uptime guarantee |
| IP addressing | Static IP included, more on request | Varies by plan |
| Typical role | Main business line | Small offices, or a backup line next to DIA |
For a deeper comparison, read DIA vs business broadband.
DIA vs Metro-E vs leased line
These three names often appear in the same quote, but they solve different problems:
- DIA connects one site to the internet.
- Metro Ethernet (Metro-E) connects several of your own sites to each other privately, without going over the public internet. See what is Metro-E.
- A leased line is a private link between exactly two points, such as an office and a data centre. See what is a leased line.
Multi-site businesses often combine them: Metro-E between offices, and DIA at the headquarters (and sometimes at each branch) for internet access. In Malaysia, TM delivers DIA and Metro-E over its TM DOME (Direct Over Metro-E) fibre service.
Who needs DIA?
DIA is worth considering when a slow or dropped connection costs you real work or revenue. Typical signs:
- Around 50 to 500+ staff on one site, or a busy branch network
- Cloud ERP, accounting or CRM that the whole team relies on
- Heavy Microsoft 365, file sync and video meetings
- Remote staff connecting back to the office over VPN
- Large uploads: offsite backups, design files, CCTV viewing
- Regulated or always-on operations such as banks, factories and MNC offices
If you are not sure how much bandwidth that means for your office, our DIA bandwidth sizing guide walks through it step by step. For a single office, 50 to 100 Mbps is a common starting point.
Key terms you will see in a DIA quote
- Bandwidth (Mbps / Gbps). The committed speed, the same in both directions. Malaysian carriers publish DIA options from about 10 Mbps up to 10 Gbps.
- SLA. The carrier’s written commitment on availability, how fast faults are fixed, and what happens if it misses the target. Our DIA SLA guide explains what to check.
- MTTR. Mean time to repair or restore: how quickly a single outage must be fixed.
- Service credits. Money back on your bill if the SLA is missed, where the contract provides for it.
- On-net / off-net. Whether the carrier’s fibre already reaches your building. On-net sites are faster to install.
- CPE. Customer premises equipment, usually the carrier’s router or network terminal on your site.
- Contract term. Commonly 12, 24 or 36 months; some carriers publish terms up to 60 months.
- Setup and fibre pull. There may be a one-time setup fee, plus a build cost if new fibre has to reach your building.
Who sells DIA in Malaysia?
DIA is sold by the licensed Tier-1 carriers, including TM One, TIME dotCom, Maxis Business, CelcomDigi Business and U Mobile, and by partners who buy from them. Coverage, bandwidth range, contract terms and bundled extras differ by carrier and by building, so no single carrier is always the best or cheapest. Our DIA carriers compared page summarises what each carrier publishes, and Tier-1 vs Tier-2 telcos explains why the underlying network matters.
How resilient is DIA?
A single DIA line is far more predictable than broadband, but it is still one circuit. For higher resilience, businesses in Malaysia commonly use one of two designs:
- DIA plus broadband failover on the same router, so staff stay online if the main line has a fault.
- Two DIA lines from two different carriers on separate routes, for the highest resilience.
See how Malaysian businesses achieve near-zero internet downtime for the trade-offs.
How to buy DIA in Malaysia
- Write a short site brief: full address and floor, users, the applications that matter, bandwidth, contract term, static IPs and whether you need a backup path.
- Get written offers from at least three Tier-1 carriers for that exact address. What reaches your building decides speed of install and cost.
- Read the SLA and contract terms before you sign, including upgrade and downgrade rules during the minimum term.
- Plan the install. On-net buildings typically go live in about 4 to 6 weeks; where new fibre is needed, about 8 to 16 weeks. Our DIA installation timeline checklist covers each step.
Pricing depends on location, fibre availability at your building, bandwidth and contract term. For context, see the Malaysia DIA price guide; for a firm figure, you need a quote for your address.
DACS compares DIA offers from TM, Maxis, TIME and uMobile in one request, and our network operations centre follows up with the carrier when something goes wrong. Get a competitive DIA quote for your address
Frequently asked questions
What does DIA stand for?
Dedicated Internet Access. It is a business internet service where the bandwidth is reserved for a single organisation, delivered with symmetrical speeds and an SLA.
Is DIA the same as a leased line?
Not quite. People sometimes call DIA an “internet leased line”, but a leased line in the strict sense is a private link between two of your own points that does not touch the public internet. DIA connects your site to the internet.
Is DIA faster than fibre broadband?
Not always on headline download speed, but DIA delivers its full contracted speed in both directions at all hours, because the bandwidth is not shared. Broadband speeds drop at busy times and upload is usually much lower.
Does DIA come with a static IP?
Yes. DIA includes a static IP address, and more fixed IP addresses can be requested.
How long is a DIA contract in Malaysia?
Commonly 12, 24 or 36 months. Longer terms usually lower the monthly rate; some carriers publish terms up to 60 months.
Can I upgrade DIA bandwidth during the contract?
Usually yes, where the carrier’s infrastructure at your site supports it. Some carriers do not allow downgrades during the minimum contract period, so check the terms before you sign.
More quick answers are in our DIA FAQ.
Last updated: 21 October 2026. Bandwidth ranges and contract terms are taken from public carrier information and DACS guides; your quote and service order apply for your address.