(a)Same day transfer takes place when a customer takes over service at a site where it already exists (no new external wiring is provided) and there is no break in service. This must take place on the same calendar day.

Non-same day transfer occurs when a customer takes over service at a site where it already exists (no new external wiring is provided) and there is a break in service and/or when the transfer occurs on different calendar days.

(b) The minimum period of service is 12 months. Only in the case of takeovers is it 3 months

(c) Per ISDN 2 line or group of ISDN 2 or ISDN 2e lines (auxiliary working).

(d) The diverted part of the call is charged to the renter of the service at standard dialled rates; calling customers pay the call charge only to the number dialled.

(e) When raising charges for a change of number on ISDN 2, it should be noted that there are FOUR configuration options available to the customer, and so care should be taken to ensure the correct tariff is raised.

(f) Should the customer wish to renumber channel 2 only (Option 3), the administration fee of £50.00 will not appear on CSS, and therefore the £8.69 charge SHOULD BE MANUALLY OVERWRITTEN ON CSS TO READ £58.69.

(g) New provision of this service will be temporarily suspended until further notice.

(h) Shelf Mounting 1A has a maximum capacity of 10 NTE6C's whilst the Shelf Mounting 2B has a maximum capacity of 6 NTE8A's. Both mountings are a standard 19 inch width. Shelf 2A is no longer available for new supply.

(i) Where existing ISDN 2 or ISDN 2e lines are to be shifted into a newly provided Shelf Mounting 1A or 2A an Internal Shift & Provision of Internal Exchange Line Wiring charge see Section Part 12 should be made for the appropriate number of lines.

(j) Lines installed installed before 23 September 1996 will be able to migrate on to Start Up or Call Plan at no extra charge.

(k) All options will be eligible for term contract rental discounts, as outlined in Part 27 of this Section.

(l) Customers giving up service within the minimum term period of 12 months will be liable for outstanding rental for that period.

(m) Customers can migrate from a non-Inclusive Call Allowance option to an Inclusive Call Allowance option (or vice versa) after the completion of the minimum term of service. The Inclusive Call Allowance (for Home Highway) option will not be available for new supply from 1 June 2003. Migration between Home and Business Highway or ISDN2e will incur conversion charges. (Home Highway has been withdrawn from new supply with effect from 5 September 2005).

(n) This service is not available at all exchanges. If a customer requests the service on an exchange not equipped for DDI, the appropriate Out-of-Area exchange line tariffs apply in addition to the standard DDI rates.

(o) Where a customer requests a previously unplanned addition to an existing ISDN 2 or ISDN 2e DDI installation the Changes to Numbers at an installation' charge applies plus any additional number charges which apply. This does not apply to directory numbers (SNDDI for ISDN2e) when provided at the time of initial installation.

(p) DDI rental charges apply to all numbers within the ranges provided/installed. Numbers can be reserved at no charge but BT reserve the right to insist that these numbers be used for other customers if required, unless the original customer starts to rent the reserved numbers.

(q) This service is not available at all exchanges. If a customer requests the service on an exchange not equipped for DDI, the appropriate Out-of-Area exchange line tariffs apply in addition to the standard DDI rates.

(r) These charges are in addition to standard prices for ISDN2 and ISDN2e lines.

(s) When a customer is provided with new supply of DDI, a planning charge is always raised, except for existing installations where:

- previously planned for growth is being supplied or,

- planning not required.

(t) An ISDN number range is a contiguous sequence of DDI numbers. A group of ISDN channels may have up to a maximum of 5 number ranges allocated to it.

(u) As a feature of the Callplan and Callplan Plus optionsoption outgoing call barring will be provided on request at no charge as long as two clear working days notice is given. Requests for barring or reversal of barring cannot be carried out at a specific time, or on non-working days and bank holidays.

(v) ISDN 2 will not be available for new supply as from 13 October 1997 (except on UXD5 Network Exchanges that currently support ISDN 2). However, where a Customer has ceased an ISDN2 line, or had the line converted to ISDN2e, then, within a period of 10 days from completion of the conversion/cease, BT will, at the request of the Customer, endeavour to re-supply the ISDN2 line. This re-supply will be subject to survey and BT cannot guarantee re-supply of the service to the original configuration, or at all, nor will standard lead times apply. ISDN2 re-supply will be charged at the full current connection price.

(w) Data calls as well as voice calls can be diverted under these options.

(x) ISDN 2e lines for use with DDI numbers must be provided as ISDN 2e (System Access) channels.

(y) Customers upgrading from ISDN 2 service to ISDN 2e service may be out of service for up to one day whilst the conversion process is completed. This upgrade charge is only applicable during normal working hours. Time Related charges apply at other times.

(z) ISDN 2 single channel numbering is not transferrable to ISDN 2e so one of the MSN options will be required on the upgrade of a SCN installation. Customers should check their terminal equipment supports MSN working before requesting the upgrade. Where an ISDN 2 customer wishes to extend a line hunt group with new lines, this will necessitate an upgrade to ISDN 2e. In this case upgrade charges will be waived.

(aa) ISDN 2e lines for use with MSN options must be provided as ISDN 2e standard line channels.

(ab) This service is now available for new supply on existing ISDN2 lines without the need to upgrade to ISDN2e.

(ac)Conversion charges apply where an existing exchange line, ISDN2 line or Business Highway is converted to provide the required service. Where the line is converted any outstanding Inclusive Call Allowance is lost. The following lines are excluded: low loss exchange lines, wholesale exchange lines, out-of area lines, exchange lines to non-served premises, temporary lines and payphone lines.

Where this applies termination/cancellation charges will not be enforced on the channels or lines converted, up to max of 2 channels or lines converted per Business Highway line, provided that a minimum term of 1 year is taken, or in the case of existing long term contracts the same or longer term of service is taken on conversion.

Where conversion involves a change of Directory Number(s) for Business Highway or ISDN2/2e customers only, one Caller Redirect service will be provided free of charge, on request for 12 months for a maximum of one Directory Number per Business Highway or ISDN2/2e line. The customer has the choice on which number the Caller Redirect is provided.

(ad) Any un-used Inclusive Call Allowance at the end of the quarter will not be carried forward to the next quarter. Unused allowances cannot be transferred to other ISDN/PSTN lines and will not be refunded or compensated in any other way. The Inclusive Call Allowance applies to all calls except the exclusions below:

Exclusions for Business Highway and Business ISDN2/2e only

The following types of call are excluded from the Inclusive Call Allowance: Chargecard Calls, Ring Me Free calls, Operator calls and Select Service facility fees, and calls to Global Mobile Satellite System (Iridium and Thuraya), and calls to numbers shown in Section 2 Part 11, 12, 13, 14, 15 or 16 of the BT Price List with a Categorisation for Customer Options of 1, 2, 4, 5 or 10. Normal discounts (eg Business Choices, Premier Line, Friends & Family, Key Numbers) apply in addition to the Inclusive Call Allowance.

Exclusions for Business ISDN2e at Residential addresses only

The following types of call are excluded from the Home Highway (Home Highway has been withdrawn from new supply with effect from 5 September 2005) inclusive call allowance* and ISDN2e Inclusive Call Allowances at residential addresses: Operator calls, Select Service facility fees, calls to Global Mobile Satellite System (Iridium, Thuraya) and calls to numbers shown in Section 2 Part 11, 12, 13, 14, 15 or 16 of the BT Price List with a Categorisation for Customer Options of 1, 2, 4, 5 or 10. Normal discounts on residential call options (eg Premier Line, Friends & Family) apply in addition to the Inclusive Call Allowance. There are no exclusions for lines on annual Inclusive Call Allowance.

NB: Charges for TotalCare (PromptCare is not available), internal shift and wiring are applicable to Business Highway.

(ae) Applicable to new supply or changes.

(af) The minimum term of service is 1 year and long term discounts do not apply. If cessation occurs before the minimum term expires, then the full rental for the minimum term must be paid.

(ag) Note: ISDNConnect was withdrawn from new supply on 31st August 2006. Service withdrawal was completed on 28th September 2007.

(ah) With effect from 22nd October 2006, spread connection and spread conversion options will no longer be available to new customers applying for BT Business Highway, ISDN2 and ISDN2e and the information in the following tables regarding spread connection and spread conversion charges for those services will not apply to those customers.

Customers who apply for an ISDN2/Business Highway service can choose to spread either the connection charge or the conversion charge over 12 months. There are five payments: an initial payment followed by four quarterly payments which will be added to the next four quarterly bills. Details of the initial and quarterly payments are as follows:-

NB: Spread Connection is not available for the conversion charge for Call Plan.

Spread Connection/Conversion is not available for BT Working Together and BT Together for Business

(ai) This product is not available for new supply.

(aj) Customers must ensure they have the correct CPE that is compatible with these services. (Note - */# codes cannot configure these services.)

(ak) This service is not available to customers with a `System' access configuration.

(al) This code is used to record the number of ISDN2e Single Number DDI installations.

(am) For existing analogue DDI systems where analogue lines are to be replaced by ISDN2e and no other changes are required (i.e. there is no removal or growth requirement and the existing DDI numbers do not require alteration) the DDI connection and planning charges do not apply.

(an) For full details and notes applicable for BT Working Together for Business Lines, see Section 3 Part 2

(ao) BT Working Together is not available for new ISDN2e supply.

(ap) VAT prices are rounded up. As a consequence the inclusive VAT call allowances for all the Home Highway options are overstated by 1p/quarter.

(aq) Presentation Number (PN) is available to Business customers only. It is charged on a per Installation basis with one PN being allowed per Installation. These can only be ordered via the Presentation Number Service Centre, using the PN order form, which has to be signed by an authorised representative of the company requesting the service. The form, available from BT web sites, requires that the customer complies with legal requirements embodied in the Ofcom Code of Practice concerning the ownership and ability of the requested PN to receive calls. A PN must not be a number that connects to a revenue sharing number that generates an excessive or unexpected call charge. (NB the exploitation of a Presentation Number to generate revenue-sharing calls may constitute persistent misuse of an Electronic Communications Service and may result in the withdrawal of the service)

(ar) Multi line ISDN 2 Anonymous Call Rejection (ACR) is available to Business customers only. It is charged on a per Installation basis with one ACR being allowed per Installation. A survey has to be completed to ascertain the provision date.

(as) Not available for new supply.