ISDN 2 Line Rental

Digital ISDN 2 line rental suitable for small to medium businesses



Digital lines with support for multiple numbers

  • Suitable for small and medium businesses
  • Supplied as Digital Standard or Digital System lines
  • The majority of lines will use Digital System technology
  • Can support multiple DDI number ranges
  • Requires a PBX phone system to link to your phones
  • ISDN 2 lines are supplied as pairs (2) channels
  • Lines supplied are subject to survey



Digital System ISDN2
Digital System ISDN2

This is when an ISDN2e line connects to a PBX. Signals from the network travel as far as the PBX which then, according to how it's programmed, decides the onward routing. DDI's can be set up with this configuration to point to internal extensions. This is the most popular choice of ISDN configuration.

Digital Standard ISDN2
Digital Standard ISDN2

This is a configuration where one stand alone ISDN2e line connects straight to equipment. These are typically used for data applications owing to the inability to support line hunting or multiple channels beyond the initial 2.

Supplied & Supported by Openreach
Supplied & Supported by Openreach

The lines we provide are supplied and supported by Openreach. Openreach are part of the BT Group, but are heavily regulated to ensure that no one provider has an advantage over the other. As such we buy our lines and support from Openreach on the same basis as everyone else. No competitor can deliver or support lines quicker than we can.

Fully Itemised Paperless Billing
Fully Itemised Paperless Billing

When you make calls through our lines we fully itemise each call allowing to you track spend. Alongside our standard online itemised billing you will find graphical statistics and powerful interrogation solutions providing you the ability to better understand what makes up the bulk of your call costs. To help the environment and to keep costs low we don't send out paper copies of calls, they are solely available online.

No Minimum Spend Commitments
No Minimum Spend Commitments

Unlike a growing number of our competitors we don't contract you to a minimum spend each month simply to get the best rates. We offer the best rates to all our customers allowing you to make use of the lines without thinking of how much or how little you are spending.

Directory Enquiries Listing
Directory Enquiry Listing

If you would like to appear, or not to appear in the directory enquiry, as a residential or business user, then we can set how this appears. Simply contact us to make any amendments, all of which are completed without additional charge.

Short Term Contracts
Short Term Contracts

Unlike the vast majority of our competitors, we operate our PSTN lines on 1 month contract terms. We believe that as long as we remain competitive and provide the support you require, there should be no need to restrict your line provider choice.

UK Phone & Email Support
UK Phone & Email Support

Our support staff are highly trained in dealing with telephone support queries. Using the very latest WLR3 platform from Openreach ensures we have powerful diagnostic tools and the ability to pick appointments whilst you are on the call to us. All support is housed in the UK within our Croydon offices.

Order Types

Transferring existing lines or installing new lines, we can deliver

Like-For-Like Transfer
Like-For-Like Transfer

When you have an existing line with another provider, and wish to move this across to CIX we would typically action this on a like-for-like basis. This ensures that your line properties, DDI's and line features remain the same without any disruption or downtime.

Transfer with Changes
Transfer with Changes

When we transfer an existing phone line we can arrange to make changes to the line properties or features. For example, you may wish to change your line from a 4 channel operation to a 2 channel setup, or perhaps you would like CLIP enabled. We can handle all of these as part of the switch.

New Installation
New ISDN 2 Installation

If you require a new ISDN 2 line we are able to arrange this into your property. Provide us notes of where you would like it installed and these will be passed to the assigned engineer. Full details of the appointment slot for the visit are supplied in advance and can be changed if they're not suitable.

Change of Address
Change of Address

A change of address order would be required if you wish to retain your phone number as part of a move. There are some restrictions regarding number retention which can complicate matters, but our staff are trained to check and can advise on alternative arrangements if necessary.

Download Line Rental Pricing

Download Line Rental Pricing

We recommend you contact us with your requirements and we can provide you an obligation free quotation. Line rentals can be complex, so to ensure that you understand the costs fully our team are happy to put together a proposal. If you prefer, a complete pricing list for our lines can be accessed here.

Download Rates

Care Levels

Levels of support from Openreach

Don't under estimate your reliance on a working phone line. Don't take the chance of a slow response time from Openreach, and instead invest in a higher care level to act as your insurance policy should the unexpected happen.

ISDN2 Lines Monthly Cost (ex.VAT) Description
ISDN2 Care Level 2 Standard Clear by 23.59 next day, Monday to Saturday, excluding Public and Bank Holidays. For example, report Tuesday, clear Wednesday.
ISDN2 Care Level 3 (per channel) £3.80 Report 13.00, clear by 23.59 same day. Report after 13.00 clear by 12.59 next day, seven days a week, including Public and Bank Holiday.
ISDN2 Care Level 4 (per channel) £5.50 Clear within 6 hours, any time of day, any day of the year.

Contract Length

Amongst of the shortest term ISDN 2 line contracts in the UK

Minimum contract lengths
New Installation 1 month
Transfer Line 1 month


Answers to common questions

Questions around installation or anything else around your line? Below are the ones customers commonly ask and our answers. Should you have a question that isn't answered here you can call us on 03300 538 548 or email us at sales@cix.uk.

The timescale's for a new phone line depends on the available appointments locally from Openreach. These can vary typically from 15-30 working days for ISDN2 lines. By default we will always select the soonest available appointment, although we can change this should this fail to suit you.

Unlike with single PSTN lines it isn't possible to simply restart a stopped ISDN2 line.

If we complete a like for like transfer of a line, there is an Ofcom regulated timescale of 10 working days. The existing phone number(s) and features will be transferred in the process without any downtime or disruption.

If we are transferring your line from another provider your phone number will remain the same.

Once a phone line has transferred to CIX you should make use of the diagnostics and fault raising tools within our control panel. They allow you to raise a fault in real-time to Openreach around the clock. We provide a tool allowing you to see notes as they arrive with us. Should you have any general questions then we are always available by calling or emailing us.

We can change your ISDN2 number, and we can add additional DDI number blocks, however at present there are no number selection facilities available. As such, the numbers provided would be the next available from Openreach's pools.