SDSL solutions
Price and availability check
Stable. Symmetrical. Securely connected.
SDSL for constant performance and reliable connections
Companies that rely on fast and stable connections know this: Insufficient internet speeds can slow down work processes and impair efficiency. Symmetrical bandwidths are particularly important for cloud-based applications or video conferences.
SDSL from SAVECALL offers you a solution that guarantees fast upload and download speeds for smooth communication and data transfer in real time. Optimized Service Level Agreements (SLAs) and high availability ensure that your business-critical applications always run reliably.
- Symmetrical bandwidths for upload and download
- Quality for voice and video through Quality of Service with several service classes
- Service level agreements with guaranteed availability and fault clearance times
- Individually preconfigured managed router by most providers
- Static IP range directly on the carrier backbone
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Explained by experts:
What is SDSL:
What is SDSL?
An SDSL (Symmetric Digital Subscriber Line) is a symmetrical Internet connection, i.e. identical upstream and downstream. This form of symmetrical bandwidth is designed in particular for professional business use, where SDSL lines are often used as a pure business SDSL solution for corporate customers.
The difference to normal DSL lines offered to private customers lies in the symmetry. With private customers, the bandwidth is only referred to as the maximum downstream; the upstream is usually much lower. This is due to the fact that only a small amount of data is usually transferred to the network. With a symmetrical Internet such as SDSL, on the other hand, the same data throughput is guaranteed in both directions. This symmetrical internet access is the basic requirement for modern cloud applications, VoIP telephony and video conferencing.
Typical areas of application for SDSL
An SDSL line is usually used purely as an Internet connection for smaller companies or as a backup for an existing dedicated line. It is also conceivable for the Site Connectivity of smaller branch offices to the central MPLS or VPN network. The SDSL connection is often used where a full fiber optic connection is not available or not economically feasible. An SDSL leased line in the classic sense (i.e. with symmetrically guaranteed bandwidths on a copper basis) therefore offers a cost-efficient alternative to fiber optic-based solutions such as DSL leased lines via Ethernet.
Range and alternatives
SDSL connections can be offered from 2 Mbit/s up to 40 Mbit/s, depending on the location. In contrast to leased lines , however, these are mainly based on copper, which guarantees a lower level of reliability compared to fiber optics.
It is important to note that bandwidths are not guaranteed with this type of connection. If you need guaranteed bandwidths for your Internet access, you should consider a dedicated line .
Alternatively, a radio relay (WLL) connection is also conceivable. An SDSL modem or a pre-configured router is included with most providers and is delivered ready for use. Today, SDSL is almost exclusively offered as an SDSL flat rate with unlimited data volume, which significantly simplifies the calculation of monthly costs.
Features of an SDSL
Symmetrical bandwidth
Upload and download are identical, including SLAs granted and guaranteed by the provider
Quality of Service (QoS)
with two or more service classes for the prioritization of e.g. Voice
SLAs (Service Level Agreements)
offer various guaranteed availabilities and fault clearance times
Individually configured managed router
for connection on site (included with most providers)
Static IP range
with direct connection to the carrier backbone
Access to networking
Branches and smaller subsidiaries can be networked via IPSec encryption.
Partners
SDSL or leased line: which solution is right for your company
SDSL and leased line in comparison
SDSL and leased lines are often compared because both solutions are designed for professional business use. The right choice depends on three factors: required bandwidth, availability requirements and budget. SDSL is the cheaper option with symmetrical copper-based bandwidth, while a leased line via fiber optics provides guaranteed bandwidth and maximum availability.
| Feature | SDSL | Leased line |
| Transmission medium | Copper | Glass fiber |
| Bandwidths | 2 to 40 Mbit/s | 10 Mbit/s to 100 Gbit/s |
| Guaranteed bandwidth | best effort | guaranteed |
| Availability | up to 99.5% | up to 99.99% |
| Symmetrical | Yes | Yes |
| Provisioning time | 4 to 8 weeks | 8 to 24 weeks |
| Monthly costs | from approx. 100 EUR | from approx. 500 EUR |
| Suitable for | SMEs, backup lines, small locations | Medium and large companies, critical applications |
When SDSL, when leased line?
SDSL is the right choice if you need a reliable symmetrical connection at moderate costs, for example for smaller branch offices, backup scenarios or as a connection for smaller branch offices. A leased line is worthwhile as soon as business-critical applications run over the line, guaranteed bandwidths are required or higher speeds are needed. Many companies combine both solutions: Leased line as primary connection, SDSL as backup
SDSL providers at a glance
The most important SDSL providers in Germany
| Provider | Strength | Bandwidth range | SLA level | Special feature |
| Colt | international solutions | 2 to 40 Mbit/s | excellent | Premium SLAs |
| German Telekom | Nationwide availability | 2 to 20 Mbit/s | very good | Largest network coverage |
| Vodafone | Strong business customer structure | 2 to 20 Mbit/s | very good | Complete solutions with Mobile communications |
| 1&1 Versatel | Own fiber optic network | 2 to 40 Mbit/s | good | Attractively priced in supply areas |
| ecotel | Business customer focus | 2 to 20 Mbit/s | very good | Flexible contract terms |
| Plusnet | SME specialist | 2 to 20 Mbit/s | good | personalized service |
| M-net | regional in Bavaria | 2 to 40 Mbit/s | good | Regional strength |
| Telefónica | Attractively priced offers | 2 to 20 Mbit/s | good | Nationwide availability |
Comparison of SDSL providers
The market for SDSL connections in Germany is extensive and confusing. Each provider has its own tariff structures, contract conditions, service levels and regional availability. A direct comparison of the most important providers helps with pre-selection, but is no substitute for a location-specific availability check, as bandwidth and price depend heavily on the distance to the nearest main distribution frame.
What you should look out for when choosing
When choosing an SDSL provider, you should not only compare the price, but also consider the following criteria:
- Symmetrical bandwidths for upload & download
- Quality of service with several service classes for voice and video
- Service level agreements with guaranteed availability and fault clearance times
- Preconfigured managed router included with the provider
- Static IP range with direct connection to the carrier backbone
- Contract term and notice periods
- Regional availability at your own location
As a carrier-independent consultant, SAVECALL compares all relevant providers and finds the right solution for your location, without being tied to a single carrier.
What does an SDSL connection cost?
SDSL cost comparison
The cost of an SDSL connection in Germany typically ranges between EUR 100 and EUR 800 per month. The wide price range can be explained by several factors: desired bandwidth, distance from the location to the nearest main distribution frame, selected service level agreement, contract term and provider. In addition to the monthly basic fees, there are often one-off provisioning costs of between EUR 200 and EUR 1,500.
What influences the price
The most important price factor is the distance to the carrier’s nearest main distribution frame. The further away your location is, the more expensive the provision will be or the lower the maximum available bandwidth. The selected SLA also has a significant influence: 99% availability is significantly cheaper than 99.9% with guaranteed fault clearance times. Longer contract terms (24 or 36 months) typically reduce the monthly costs by 10 to 20 percent
Specific prices for your location
All-inclusive prices can only provide an initial guide. The actual conditions always depend on the specific location and the infrastructure available there. Our availability and price check at the top of this page will provide you with concrete offers from several carriers for your location within 24 to 48 hours.
Typical price ranges according to bandwidth
| Bandwidth | Monthly costs | Typical area of application |
| 2 Mbit/s | 100 to 200 Euro | Small sites, backup |
| 4 Mbit/s | 150 to 300 Euro | small offices, individual branches |
| 10 Mbit/s | 250 to 500 Euro | Medium-sized locations, SMEs |
| 20 Mbit/s | 400 to 700 Euro | Larger branches |
| 40 Mbit/s | 600 to 1,000 euros | High requirements, cloud-intensive companies |
Order SDSL: How the process works
The path from initial interest to an active SDSL connection typically takes five steps. With SAVECALL as your consulting partner, you save yourself the trouble of directly comparing several carriers and receive all relevant offers from a single source.
The five steps to ordering SDSL:
1
Availability check:
Enter your location, desired bandwidth and company details in the checkbox at the top of this page. Within a few seconds, you will see which providers can deliver SDSL at your location.
2
Select bandwidth and SLA:
Based on your requirements (number of employees, planned applications, backup concept), you select the appropriate bandwidth and the desired service level.
3
Compare provider offers:
SAVECALL provides you with a comparison of the best offers from our 80+ carrier partners. Including transparent presentation of monthly costs, one-off costs, contract term and SLA level.
4
Consultation
A SAVECALL consultant discusses the recommendation with you and answers all technical and commercial questions. If necessary, adjustments or special conditions are negotiated.
5
Contract conclusion and installation:
Once the contract has been signed, SAVECALL takes over the coordination with the carrier. The typical provisioning time for an SDSL connection is between 4 and 8 weeks. SAVECALL is available as a central point of contact during and after installation.
SDSL consulting from SAVECALL
As a carrier-independent consultant, SAVECALL has been supporting companies for over 25 years in the selection, procurement and operation of telecommunications and IT solutions. With SDSL connections, you benefit from our access to more than 80 carrier partners worldwide and a central point of contact for all providers.
What sets our advice apart:
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Carrier independence:
We recommend the best solution for you, not the solution of a specific provider
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80+ carrier partners:
Access to national and international providers, from Deutsche Telekom to Colt
>
One contact person:
Instead of coordinating several carriers, everything runs via SAVECALL
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Savings of at least 20 percent:
Our customers save an average of at least 20 percent of the original provider prices through carrier comparison and negotiation
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Full service:
From availability checks and contract negotiations to ongoing operations
Arrange a free expert appointment and receive a location-specific recommendation for your SDSL connection.
Awards for Outstanding Performance
SDSL stands for Symmetric Digital Subscriber Line. It is an Internet connection with identical upload and download speeds, primarily designed for business customers. In contrast to private customer DSL, the bandwidth is the same in both directions.
The monthly costs for SDSL are typically between 100 and 800 euros, depending on bandwidth, location, SLA level and contract term. There are also one-off provision costs of between 200 and 1,500 euros. Specific prices can only be determined after checking the location.
SDSL connections offer symmetrical bandwidths between 2 Mbit/s and 40 Mbit/s. The actual available bandwidth depends on the distance to the nearest main distribution frame and the local infrastructure. Higher bandwidths usually require dedicated fiber optic lines.
The most important SDSL providers are Deutsche Telekom, Vodafone, 1&1 Versatel, ecotel, Plusnet, Colt, M-net and Telefónica. Each provider has different regional strengths, tariff structures and SLA levels. A direct comparison of conditions is advisable, as prices and availability depend heavily on the specific location.
The typical provisioning time for SDSL is between 4 and 8 weeks from the conclusion of the contract. Factors such as the availability of technicians, necessary civil engineering work or the adaptation of the house cabling can extend the provision time.
SDSL offers symmetrical bandwidths with the same upload and download speed, ADSL is optimized for high download speeds with low upload speeds. SDSL is aimed at business customers, ADSL at private households. In addition, SDSL offers guaranteed SLAs, while ADSL usually does not.
SDSL is worthwhile for companies that use cloud applications, hold regular video conferences, use VoIP telephony or transfer data in both directions. ADSL may be sufficient for pure Internet use, but SDSL is much better suited to professional business requirements.
Yes, SDSL is ideal as a backup line for an existing leased line. In this scenario, the leased line remains the primary connection and SDSL automatically takes over in the event of a failure. It is important that both lines are routed via different carriers or routes.
Contract terms of 12, 24 or 36 months are standard. Longer terms reduce the monthly costs by 10 to 20 percent. Some providers also offer contracts that can be terminated on a monthly basis, albeit with significantly higher monthly costs.
The contract must be terminated in writing to the respective carrier, usually with a notice period of 3 months to the end of the contract. When changing providers, it is advisable to conclude the new contract in good time so that the transition is successful without interruption.
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