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EFM

As Good as Copper Connectivity Gets

EFM is an uncontended internet service delivered over traditional copper telephone lines. It provides a symmetrical connection at up to 20 Megabits per second.

Perfect for locations where Leased Lines or EoFTTC are not available, EFM uses the legacy infrastructure of every BT exchange to reach out and connect you. And because Ethernet First Mile is a low latency service, it is ideal for IP Telephony or using applications in the Cloud. Like all copper-based connections, performance is governed by the length of the cable, but we always guarantee the speed of your service before taking your order. It uses multiple phone lines, giving you extra resilience so, if one line fails, your office will still remain connected.

With symmetrical performance on a dedicated connection, EFM bridges the gap between Leased Lines and Broadband.

Costs

EFM is a low-cost alternative to a Leased Line, and is more widely available than EoFTTC.

Set up is free on a three-year contract, and the service costs just £200 per month for a two pair connection, or £300 per month for a four pair connection.

Risks

EFM is delivered over ageing copper telephone lines, and can be affected by electrical interference, wear, or high levels of humidity.

The Service Level Agreements provide a 9-hour break-fix guarantee and, with built-in resilience, the connection will survive the loss of a pair.

Specifications

If you’re lucky enough to be within 100 metres of the exchange, we can provide a guaranteed 10Mbps service over two pairs, or 20Mbps over four. Beyond 100 metres, guarantees decrease with distance from the exchange, falling to 3Mbps at 3.2Km (over two pairs), or 3.9Km over four.

EFM is an Ethernet service, providing seven levels of QoS and up to 10 VLANs per circuit. With <10ms latency and an MTU of 1500, it can be adapted and used for a multitude of purposes.

PERFORMANCE TABLE

It's tempting to choose a service based on transfer speed alone. In reality, there's more than speed to consider when productivity is at stake. Our table below details the characteristics of each service so you can pick the connection that suits you best.

 
Downstream [Mbit/s]Tooltip
UpStream [Mbit/s]Tooltip
Latency [ms]Tooltip
Jitter [ms]Tooltip
Max Acceptable Packet LossTooltip
VLANs supportedTooltip
MTU supportedTooltip
QoS classesTooltip
MPLS supportTooltip
Breakfix Sev 1 [hours]Tooltip
Breakfix Sev 2 [hours]Tooltip
Breakfix Sev 3 [hours]Tooltip
Installation [days]Tooltip
Underlying technologyTooltip
Probability of full incident resolutionTooltip
My Results
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From your results it's likely that you have an ADSL connection.

Would you like to talk in more detail about your results? Get in touch and speak to one of our friendly team members.

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My Results

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