Business DSL
Business DSL delivers broadband over the same copper phone lines already running to your building, with the bandwidth aggregated and shared back at the carrier's central office. A business DSL line is typically asymmetrical, running from 256 Kbps up to about 1.5 Mbps, with ADSL variants reaching higher downstream speeds. It is the budget-conscious way to put a small office online when dedicated fiber or a T1 line is not justified.
How business DSL works
Business DSL rides the existing copper phone line from your office to the central office, where many DSL subscribers are aggregated onto shared upstream bandwidth. Because that bandwidth is shared and oversubscribed, DSL is best-effort rather than guaranteed. Most business DSL is asymmetrical, with a faster download than upload, though SDSL offers symmetrical speeds.
Typical business DSL pricing
When it fits
✓ Great fit
Business DSL is a great fit for budget-conscious small offices of 5 to 30 users that need affordable broadband over their existing copper phone lines. It suits general web, email, and light cloud use where keeping monthly cost low matters more than guaranteed speed. Where DSL is available, it is often the cheapest way to get a business online.
● Consider instead
Consider a dedicated option when you need guaranteed bandwidth, a hard SLA, or symmetrical speeds for voice and video. Because DSL bandwidth is shared and aggregated at the central office, it is subject to oversubscription and best-effort performance. A T1 line, fiber, or business cable delivers more consistent throughput for demanding sites.
How it compares
A T1 line is dedicated and symmetrical with an SLA; business DSL is shared, asymmetrical, and best-effort, but far cheaper.
Fiber delivers vastly more bandwidth and far better value per Mbps; DSL wins only on low entry price over existing copper.
Business cable usually offers higher download speeds for the money; DSL distance from the central office can limit its reach and speed.
What to look for
- ✓Distance to the central office. DSL speed drops the farther your copper runs from the CO, so confirm what your line can actually deliver.
- ✓ADSL vs. SDSL. ADSL is asymmetrical with a faster download; SDSL gives symmetrical upload and download for hosting or voice.
- ✓Shared and best-effort. Because bandwidth is aggregated and oversubscribed at the CO, advertised DSL speeds are a ceiling, not a guarantee.
- ✓No hard SLA. Most business DSL is best-effort, so weigh that against a dedicated circuit if uptime is critical.
Common questions
How fast is business DSL?
Business DSL typically runs from 256 Kbps up to about 1.5 Mbps, though ADSL variants can reach higher downstream speeds depending on your distance from the central office.
How much does business DSL cost?
Business DSL usually costs between $80 and $500 per month depending on speed and whether the line is asymmetrical ADSL or symmetrical SDSL.
Is business DSL dedicated or shared?
DSL bandwidth is aggregated and shared at the carrier's central office, so it is subject to oversubscription and is best-effort rather than dedicated.
What is the difference between ADSL and SDSL?
ADSL is asymmetrical with a faster download than upload, while SDSL is symmetrical, giving equal upload and download speeds over the copper line.
Why is business DSL cheaper than a T1 or fiber?
DSL reuses your existing copper phone lines and shares aggregated bandwidth, so it costs less than a dedicated T1 or fiber circuit but trades away guaranteed speed and an SLA.
Is business DSL good for a small office?
Yes. For 5 to 30 budget-conscious users doing web, email, and light cloud work, business DSL is an affordable broadband option where it is available.
More on Business DSL
Business DSL is broadband delivered over the copper phone lines already wired to your office, making it one of the most affordable ways to put a small business online. A business DSL line carries data alongside or in place of analog voice on that same copper, and the bandwidth is aggregated back at the carrier's central office. Because many DSL subscribers share that upstream capacity, DSL is subject to oversubscription and performs on a best-effort basis. Most business DSL is asymmetrical, delivering a faster download than upload, with speeds that typically run from 256 Kbps up to about 1.5 Mbps. ADSL variants can push downstream speeds higher when your copper run to the central office is short enough.
There are two main DSL variants. ADSL is asymmetrical, favoring download speed, while SDSL is symmetrical and better suited to hosting, voice, or two-way traffic. Either way, business DSL is the budget-conscious choice for offices of 5 to 30 users where keeping monthly cost low outweighs the need for a guaranteed, dedicated circuit. When demand grows or uptime becomes critical, a dedicated T1 line or fiber connection is the natural step up from DSL.
Types of serviceOptions and variants
What businesses use it for
- ✓Affordable small-office internet. Business DSL puts a budget-conscious office of 5 to 30 users online over existing copper phone lines.
- ✓Web, email, and light cloud. DSL handles everyday browsing, email, and modest cloud applications without a dedicated circuit.
- ✓Branch and satellite sites. An inexpensive DSL line connects a small branch where fiber or a T1 line is not justified.
- ✓Backup connectivity. Business DSL makes a low-cost secondary line behind a primary dedicated connection.
- ✓Voice over DSL. SDSL's symmetrical bandwidth can support hosted voice for a small office.
Business DSL details
Business DSL service is perfect for small and medium sized businesses needing an Internet Service Provider for 5 to 30 users. Business DSL is a portion of a 24 channel circuit where bandwidth is aggregated at the Central Office. While subject to oversubscription, it can be a fairly stable and reliable internet connection. Monthly price for business dsl service is between $80 and $500 depending on service level, as well as location and business dsl provider.
The connectivity ladderHow it compares, and where to go next
Where this connection sits among the options, with the businesses each one fits.
| Service | Connection details |
|---|---|
| Business DSL | 256 kbps to 1.5 mbps business internet connection Business DSL is perfect for small and medium sized businesses needing internet service for 5 to 30 users. Business dsl is a portion of a 24-channel circuit where bandwidth is aggregated at the Central Office. While subject to oversubscription, it is normally a stable and reliable broadband connection. |
| Fractional T1 Line | 256 kbps to 768 kbps business internet connectionA Fractional T1 line is perfect for small and medium size businesses needing internet service for 5 to 30 users. A Fractional T1 line is a portion of a 24-channel circuit providing a connection straight from the providers backbone. For this reason a Fractional T1 line is a very stable and reliable broadband connection. You will also maintain scalability since there is no bandwidth aggregation and the unused channels can be turned up on demand. |
| Integrated T1 Internet | |
| Full T1 Line | 1.5 mbps business internet connectionA T1 line is perfect for small and medium sized businesses needing internet access for 20 to 50 users. A T1 connection is a 24-channel circuit providing an internet connection straight from the providers backbone. This makes a T1 line a very stable and reliable broadband connection. |