ISDN30 Line Rental
With Heart Telecom line rental you can save 15% compared to BT for ISDN30 line rental and consolidate your calls and line rental service in one bill. You will keep your existing phone number and do not need to make any changes to your telecom equipment.
An ISDN30 line allows for the simultaneous connection of between 8 and 30 calls. One channel is required for each simultaneous call and there are a minimum of 8 channels required per ISDN30 line. If you require less than 8 continuous voice calls then you will need ISDN2. If you require more than 30 channels then you can simply order additional ISDN30 lines.
There are 2 types of ISDN30;
ISDN30e – uses worldwide ITU-T standard signalling Q.391 ETSI version.
ISDN30 Dass2 – uses the BT signalling system.
The vast majority of customers and equipment make use of ISDN30e. If you are unsure, please check with your equipment vendor.
At Heart Telecom, we buy line services on a wholesale basis from BT Openreach and have the same level of access to systems and support from BT Openreach as BT Retail. By understanding your needs and exceeding your expectations we aim to provide better customer service than BT Retail. Because we have direct access to BT Openreach's systems we can allocate numbers, book installations, conduct site surveys and divert calls at the touch of a button giving you all the control and flexibility you need.
Videoconferencing - Using ISDN, meetings can take place face-to-face without expensive and time-consuming travel.
We are passionate about customer service and ensuring we respond rapidly and effectively to your needs. Telephone support is free. Our customer service centre is based in the UK and is staffed by highly knowledgeable and helpful professionals.
These are the benefits of using Heart Telecom’s business analogue line rental service;
- Save 15% on ISDN30 rental compared to BT
- Transfer existing BT lines
- BT Openreach will continue to maintain your phone line
- Free online itemised bill and online account management
- Comprehensive range of ISDN features
- Free directory entry in the Business A-Z section of The Phone Book from BT
Our Prices – we charge £13.50 per channel rental per month ex VAT – that’s a 15% discount on BT Business standard rental rates. For further details, please call us now on 0845 644 0611.
Installation – in addition to being able to transfer over your existing lines, Heart Telecom can also arrange for new line installations. We will work with BT Openreach to make sure you exact needs are met.
Site Assurance
Site Assurance option 1 enables End Users to have ISDN30 exchange calls re-routed to an alternative site should the normal site become unusable for any reason.
Site Assurance option 1 is delivered using the existing ISDN 30e basic diversion services. This enables all incoming calls to an End User’s site to be diverted to a pre-arranged single number. This could be either a different site, which is to be used as a standby using a telephone number that exists, or a third party provider standby site where telephone numbers exist.
Prompt Care – Level 2
Prompt Care is the standard care level associated with ISDN30 lines and is included in the normal monthly ISDN30 rental price. The working hours for the Level 2 (Prompt Care) service are 8.00am to 5.00pm Monday to Saturday excluding Public and Bank Holidays. Faults may be reported 24 hours a day, 7 days a week (including UK Public / Bank Holidays). Where a fault is reported outside of the working hours for this service, the fault will be treated as if it has been reported at the beginning of the next working day. If the fault is not cleared during this period Heart Telecom will advise the Nominated Contact of the progress being made to clear the fault.
Total Care Level 3
Total Care is a chargeable service and operates 24 hours a day, 7 days per week including Bank and Public Holidays. Heart Telecom will respond within 4 hours of receipt of a fault report. If the fault is not cleared during this period Heart Telecom will advise the Nominated Contact of the progress being made to clear the fault.
Temporary Service Restoration (Call Diversion) is available, in circumstances where a fault is reported and the end-user is suffering from a “total loss of service”, if it is evident at the fault entry stage, that Openreach will be unable to restore service within the commitment time.
Digital Calling Features for ISDN30e
Heart Telecom is able to provide any feature available from BT Openreach to our customers. The most common features are described below.
Feature |
Description |
Calling Line Identity Presentation (CLIP) |
This service allows the called customer to receive the caller’s line identity (telephone number) before answering the call. The called party will only receive this information if the calling party has agreed to send their number (CLI). |
Calling Line Identity Restriction (CLIR) |
Customers can request that their |
Connected Line Identity Presentation (COLP) |
Allows you to confirm that the number |
Connected Line Identity Restriction (COLR) |
You can ask for your telephone numbers not to be released to callers. Please note that activation/deactivation of this facility |
Call Forwarding of Voice and Data Calls (Admin set up only) Unconditional On All Calls |
All calls incoming to the diverting group of lines are immediately diverted to the directory number that was nominated to receive the diverted calls |
Call Forwarding of Voice and Data Calls (Admin set up only) On Busy |
Diversion/Forwarding on Busy is provided so that customers have the opportunity to ensure that any overflow traffic at one location can be answered elsewhere. ISDN 30 (DASS2) will divert calls when all channels are busy. ISDN 30e will forward calls when either all channels |
Call Forwarding of Voice and Data Calls (Admin set up only) On No Reply |
Provision of Diversion/Forwarding on |
Customer controlled call forwarding of Voice and Data Calls Unconditional On All Calls |
This is the Call Forwarding option that |
Customer controlled call forwarding of Voice and Data Calls - On Busy |
This is the Call Forwarding option that |
Customer controlled call forwarding of Voice and Data Calls – On No Reply |
This is the Call Forwarding option that |
Call Deflection (CD) |
Allows you to respond to an incoming |
20 Octet Sub Addressing |
Sub Addressing (also known as |
Caller Redirect |
Caller Redirect is a service provided at the End User's local exchange that informs incoming callers of the called party's new telephone number. When an End User ceases service and takes up service elsewhere, or has a line renumbered, Caller Redirect will refer callers to the new number (the caller is not charged for the call). |
DDI |
Direct Dialling In combines the benefits of direct access to extension users without the need for individual exchange lines to be associated with each user or going via the operator. |
Presentation Number |
Presentation Number is a service that allows users to specify a telephone number for the Calling Line Identity (CLI) on outgoing calls, which may be different to the main telephone number. |
Anonymous Call Reject |
This can be used where the caller(s) are withholding their CLI. It will prevent most calls with CLI Withheld being made to the number selected. Users should be cautioned, however, that it is likely to stop other people they would be happy to speak to from phoning them (e.g. doctors, hospitals and numerous other large organisations). ACR will not reject International Calls. |
Power Supply
The 2Mbit/s NTE fitted when copper cable is used does not require a power supply as power is line fed from the BT exchange over the copper cable. The 2Mbit/s NTE fitted when fibre optic cable is used does require a power supply.
Standby Power
If required, standby batteries can be supplied at a charge, giving up to five hours backup supply. Alternatively, power can be supplied from CPE equipment if it has standby power. This will give protection in the case of a power failure so that calls can be made, but only if the iSPBX has standby power as well. If no standby power is fitted and the power is switched off to the NTE, service will automatically be restored when the power comes back on.



