Managed & Bonded SDSL Solutions

SDSL provides fast upstream and downstream connectivity available at up to 1:1 contention. An SDSL line provides the perfect solution for high quality high upstream connectivity requirements.

Using the latest G.SHDSL protocol, Connexions 4 London standard SDSL provides up to 2Mbps synchronous service. SDSL includes installation of a dedicated digital connection into your site, and is ideal for applications such as multi-user VoIP, VPN, video conferencing/streaming or for any business needing to send high volumes of data as quickly as possible.

We can also bond your SDSL lines for increased upload capacity up to 10Mbps. This is ideal for locations where leased lines are not cost effective.

We are also able to provide dedicated ADSL 2 lines with 2Mbps upload and 15Mbps download.

SDSL is available in contention ratios of 10:1, 5:1 or 1:1, dependent upon availability at the local exchange. Call our Business Account Managers to discuss your requirements and check availability of service for your location.

We are able to offer some of the most competitive prices in London and the UK on SDSL Lines. Make sure your business is not held back by slow connections and downtime.

Why use SDSL ?

Higher capacity and higher quality uploads. Ideal for Voice Over IP or design companies requiring large uploads.

Our Service

Our account management, technical support and customer service staff are second to none so you are guaranteed to receive personal and efficient service.

One point of contact - personal attention
• We work closely with you to understand your specific communications needs
• We advise you on the best use of technology
• We manage the entire project from beginning to end
• We provide technical support from our local offices
• We arrange training if required
• We have the capability to provide 24x7 customer support
• We continue to assess your changing needs
• We continue to suggest better solutions as technology develops
• We stay close to you, so that you stay ahead

Fully managed national network

Our state-of-the-art backbone infrastructure and network is expertly managed 24 hours a day, 7 days a week, ensuring you have the reliability you need for your business critical communications traffic. Due to our close relationship with many of the UK network providers, we can ensure that you are connected to the closest POP direct onto our backbone.

Our promise to you:
• highly skilled design consultants and engineers will ensure your communications solution meets your business needs
• you will receive personal and efficient service through account management and technical support teams
• the C4L fully managed network will carry your communications traffic securely and reliably

Managed Service Includes the following:

Remote monitoring
Automatic remote monitoring of your connection. This detects issues immediately. You will then be notified by chosen mode of communication and our Support Engineers are able to run remote diagnostic tests and ensure any outage is resolved in the shortest possible time.

Dialup Backup
Automatic dial up back-up connection which will take over in the event of an SDSL line failure.

Centralised Firewall
Your connection is firewalled on our network before reaching your site for additional security. This will also prevent unwanted traffic even going over your SDSL line, providing you with additional capacity.

Managed Firewall
We will configure the router to your own specific firewall requirements to suit your needs and network.

Multiple IPs
This enables you to have individual external IP addresses for all your networked devices.

Managed SDSL router
We provide a pre-configured and fully tested Cisco router.

Quality of Service
We will configure your Cisco to your requirements to provide Quality of Service and prioritise your traffic such as voice or video.

If you further information, please contact one of our sales team now on on Freephone 08000 470 481, fill in the contact us form or email us at and a colocation consultant will get back to you as soon as possible.