ADSL

Short for asymmetric digital subscriber line, ADSL is a type of DSL broadband communications technology used for connecting to the Internet. ADSL allows more data to be sent over existing copper telephone lines (POTS), when compared to traditional modem lines.

A special filter, called a microfilter, is installed on a subscriber's telephone line to allow both ADSL and regular voice (telephone) services to be used at the same time. ADSL requires a special ADSL modem and subscribers must be in close geographical locations to the provider's central office to receive ADSL service. Typically this distance is within a radius of 2 to 2.5 miles. ADSL supports data rates of from 1.5 to 9 Mbps when receiving data (known as the downstream rate) and from 16 to 640 Kbps when sending data (known as the upstream rate).

ADSL2+ business broadband from Crystaline provides exceptionally fast bandwidth using the latest network technologies. ADSL 2+ is rate adaptive and so will provide the best possible speed that your telephone line will support up to a maximum downstream of 24Mb and upstream of 1Mb with the Premium service.

ADSL Annex M business broadband from Crystaline is designed for companies that require a higher upstream bandwidth compared to ADSL 2+. ADSL Annex M changes the profile of the circuit reducing the downstream slightly in order to provide up to double the upstream compared to ADSL 2+. ADSL Annex M is rate adaptive and so will provide the best possible speed that your telephone line will support up to a maximum downstream of 16Mb and upstream of 2.5Mb.

SDSL

SDSL is symmetric broadband – providing the same upload and download speeds. This means fast upload speeds of up to 2Mb; 4 x faster than standard ADSL Max (448Kb).

Our primary SDSL range consists of four products - all of which offer uncontended (1:1 contention) 2Mb bandwidth.

VDSL

VDSL2 as it is known is the next generation of broadband service, has now been fully launched providing speeds of up to 40Mb downstream and 10Mb upstream.

What is VDSL2?

VDSL2 from Crystaline is exceptionally fast business broadband. Using fibre from the local exchange to the BT cabinet in the street (FTTC), VDSL2 provides bandwidths of up to 40Mb downstream - five times faster than ADSL Max. Upload speeds of up to 10Mb are available on Premium and up to 2Mb on Standard circuits. As fibre is used to the local cabinet this should also extend the ‘reach’ of VDSL2, meaning greater coverage for businesses currently restricted by distance limitations on ADSL.

SIP

Voice over IP is the future of telephony. A large proportion of telephone calls are now carried across operator’s networks as IP (Internet Protocol) data traffic at some point. As BT Group roll out their 21 st Century Network this will become the majority of calls over the next few years.

SIP (Session Initiation Protocol) is the industry standard method of controlling Voice over IP calls, and is used by a wide range of operators to provide business VoIP services. Crystaline’s SIP Trunk service is a tried and tested alternative to ISDN30e which the same levels of quality and reliability at a much reduced cost.

ETHERNET

Ethernet circuits provide the UK’s best Internet access circuits – Ethernet is ideal for businesses who require guaranteed throughput bandwidth with SLAs that support voice, video and mission critical data applications.

Using Ethernet circuits for your Internet access provides a dedicated high speed, uncontended, full duplex symmetrical bandwidth solution that has lower overhead, greater throughput and higher reliability than all types of broadband (ADSL/SDSL) services.

Using either fibre or copper access technology, Ethernet provides flexible bandwidth options from 2Mb right up to 1Gb. Crystaline are one of the UK’s leading Ethernet Internet providers with probably the widest range of Ethernet products including fibre & copper Ethernet Internet circuits, Point to Point Ethernet circuits, MPLS network solutions, Hosted Firewall options and VPN concentrator

• Available using Copper or Fibre access circuits.
• Ideal for combined voice and data connectivity.
• Bandwidths from 2Mb – 1Gb.
• Uncontended bandwidth.
• No DSL Overheads = maximum throughput.
• Guaranteed bandwidth (unlike ADSL or SDSL).
• Guaranteed performance with SLA.
• Highly reliable & resilient connections.
• Available as direct Internet or site to site connectivity
• Ethernet provides a cost effective high speed data interface with complete UK wide coverage.
• MPLS and Hosted Firewall functionality

MPLS

MPLS allows customers to deploy a private managed data network linking multiple sites directly into a core network using a wide range of circuits, including:

• Fibre Ethernet
• Copper Ethernet
• SDSL M
• VDSL (Fibre Broadband)
• ADSL2+ / ADSL Max

As the circuits connect into a central ‘cloud’ rather than to a specific site the network is more flexible & resilient than using site to site leased lines or VPNs which require expensive routers and configuration. Adding a new site into a network is as simple as just ordering a single circuit at the new address. Crystaline will then connect this into your MPLS network, allowing data to securely route between sites without you having to set up VPNs & firewalls.

WANS

Our MPLS solution would generally be the preferred choice, there are many occasions where a standard WAN is the preferred solution. Examples of where a standard WAN may be preferred include when there may be existing circuits that are in contract with different providers that need to be incorporated into the WAN, most of the infrastructure is already in place, or the geographic location restricts the design of the network.

We can provide advice & consultancy on the options for upgrading, extending or implementing a WAN, and incorporating MPLS into an existing WAN or providing a migration path to MPLS.Our WANs can be based on any Crystaline circuits, including:

• Fibre Ethernet (Point to Point or VPN)
• Copper Ethernet (Point to Point or VPN)
• SDSL M (VPN)
• VDSL (Fibre Broadband) (VPN)
• ADSL2+ / ADSL Max (VPN)

Internet Access is provided at one or more sites by either using a VPN circuit or having a separate connection directly out to the Internet.