A consultation
document issued by the Director General of Telecommunications on proposals
for the allocation of Access Codes for Directory Enquiry Services and
neccasary changes to the Numbering Conventions
Contents
Summary
Chapter
1 Introduction
Chapter
2 Main issues
Chapter
3 Operator responses
Chapter
4 Oftel’s Proposals for Allocation of Codes for Directory Enquiry
Services and necessary changes to the Numbering Conventions
Chapter
5 Consultation
Annex
A Draft changes to the Numbering Convention
Glossary
Summary
S.1 Oftel issued
a Statement on 19 September 2001 entitled Access
codes for directory enquiry services. That Statement included proposals
for the allocation of a new range of codes for directory enquiry (DQ)
services, namely codes beginning with 118, and the withdrawal of the
192 (currently used for national DQ services). Oftel also plans to withdraw
153 (currently used for international DQ) and any other access codes
(where used) for DQ services, at the same time as 192 (except for the
195 access code for blind and otherwise disabled consumers).
S.2 Oftel has formed
an industry working group to progress the detailed implementation of
the new arrangements for DQ services, and from this a sub-group was
formed to consider the numbering issues surrounding the DQ implementation
– the ‘DQ numbering sub-group’.
S.3 The DQ numbering
sub-group has provided responses to requests for information from Oftel
on the allocation procedure for the new DQ codes and surrounding issues.
S.4 Changes will
be necessary to the Numbering Conventions to allow implementation of
the allocation procedure for codes for DQ services.
S.5 This consultation
document sets out the issues surrounding DQ code allocation, a summary
of operator responses to the issues, and finally Oftel’s proposals,
including necessary changes to the Numbering Conventions.
S.6 Oftel is seeking
the views of stakeholders (ie the telecoms industry and consumers) on
its proposal for allocation of DQ codes and necessary changes to the
Numbering Conventions.
S.7 This consultation
will last for 28 days. Following the end of the consultation period,
and taking any representations made as a result of this consultation
into account, Oftel expects to publish a new issue of the Numbering
Conventions, to replace the issue published on 30 November 2001, which
will incorporate the necessary changes.

Chapter
1
Introduction
1.1 As provided
in the Third Issue of the Numbering Conventions (‘the Conventions’)
– (November 2001), Oftel needs to ensure that numbers are allocated
to operators on a fair and equitable basis; any arrangements for allocation
should also support effective competition.
1.2 Oftel’s standard
procedure is for numbers to be allocated on a first-come first-served
basis. However, the opening up of a new number range calls for a modified
approach, otherwise there may be a rush from the moment the numbers
are designated for assignment, and it might be difficult to fairly determine
the first applicant for any particular number.
1.3 As provided
in the Conventions, Oftel also needs to ensure that numbering arrangements
must be able to meet current requirements for numbers, and also to cope
with anticipated growth and demand for numbering in the future.
1.4 In drafting
the proposal for the number allocation procedure for DQ codes, Oftel
has taken account of the views and ideas of the operators and service
providers who have volunteered to be part of Oftel’s DQ numbering sub-group
and who wish to provide DQ services. In doing this Oftel sought specific
information from them as follows:
- how many codes
they would need for their own organisation and for sub-allocation,
how many codes sub-allocatees were likely to request from an eligible
operator, and whether sequential codes were considered to be important;
- comments on the
allocation procedure proposed by Oftel in Oftel’s September 2001 Statement
–Access codes for directory enquiry services;
- details on which
codes they considered to be ‘golden number’ codes, and which 118 codes
could be problematic if they were allocated for new DQ services.
1.5 The Third Issue
of the Numbering Conventions will require changes to ensure they comprise
arrangements for codes for DQ services. The changes are discussed below,
and the draft Numbering Conventions are shown in Annex A.

Chapter
2
Main Issues
2.1 Oftel considers
that there are four main issues surrounding the allocation of DQ codes:
- Length of codes
- Eligibility to
apply for codes
- Application and
allocation procedures
- Number of codes
per operator/ service provider.
Length
of codes
2.2 The designated
code range for the new DQ services is 118. Oftel needs to decide whether
to allocate 5- or 6-digit 118 codes. If 5-digit DQ codes are issued
ie 118XX this gives a pool of 100 codes compared to 1000 codes if 6-digit
codes are issued ie 118XXX.
2.3 Oftel needs
to consider whether shorter codes are more beneficial to the consumer
ie fewer digits to dial and remember, and balance this with the fact
that longer codes provide greater capacity to meet current and future
demand as well as providing a greater choice of codes for operators.
Eligibility
to apply for codes
2.4 Oftel currently
only allocates numbers to operators providing publicly available telecommunications
services and running a telecommunication system under a licence granted
under Section 7 of Telecommunications Act 1984, whether that is an individual
or a class licence, containing a Numbering Arrangements Condition. Oftel
may also consider allocating numbers or codes to Systemless Service
Providers (SSPs) or others in demonstrably exceptional circumstances
(eg. where the provider is in the process of setting up a system).
2.5 However, those
who are not eligible to apply for an allocation of numbers may also
wish to compete to provide DQ services. Numbering Convention 2.2 sets
out that those not eligible to apply for numbers should seek a sub-allocation
from an eligible operator.
Application
and Allocation Procedures
2.6 As explained
in paragraph 1.2, although as provided in the Conventions Oftel normally
allocates numbers on a first come first served basis, in this particular
case Oftel needs to consider an alternative method of initial allocation
so that DQ codes are allocated on a fair and equitable basis. Any allocation
method will also need to take account of the fact that some codes are
considered more ‘valuable’ because of the way they look or sound – so-called
‘golden numbers’.
2.7 A suitable timetable
will need to be drawn up to allow all potential applicants sufficient
time to submit an application for the allocation procedure. The timetable
should allow time for operators to receive orders from sub-allocatees.
2.8 The allocation
procedure needs to be transparent to applicants to ensure that codes
are allocated in a non-biased way.
Number
of codes per Operator/Service Provider
2.9 Another consideration
for Oftel is whether to restrict the number of codes allocated to any
one operator and/or service provider.
2.10 If Oftel allocates
DQ codes at 5-digit length and demand is for more than 100 codes, a
maximum limit may need to be set on the number of codes that can be
allocated per operator or service provider.
2.11 Oftel will
need to consider whether any restriction in the number of codes may
stifle competition. For example, if a service provider can only apply
via an operator, and that operator has submitted an application for
more than half the maximum number of codes allowed to provide its own
DQ services, the service provider will not be able to apply for as many
codes and will not be able to compete effectively.
2.12 However, if
there is no restriction on the number of codes per applicant, operators
may apply for many ‘golden number’ codes and stockpile them, thus preventing
other operators from getting more desirable codes.

Chapter
3
Operator Responses
3.1 Operator responses
to the specific requests for information as outlined in Chapter 1, are
summarised below.
DQ
Questionnaire Responses
3.2 19 out of the
22 respondents said they would apply directly to Oftel for 118XX(X)
codes, and out of the number of codes required by the 19 direct applicants,
74 would be for their own use and 308 for sub-allocation.
3.3 Less than half
of respondents believed the ability to obtain sequential codes to be
an important feature of the allocation procedure.
Length
of Codes
3.4 There were mixed
responses over whether 5 or 6 digit codes were easier for consumers
to remember.
3.5 Another suggestion
was to allocate most of the 118 code range as 5 digits and keep the
remainder of the range back for expansion to 6 digits, if required.
3.6 One respondent
believed that demand could be met using 5 digit codes only, and thought
it extremely unlikely that the indicated demand for DQ codes would materialise
when the lottery day arrived. The respondent thought that the final
decision on number length should be delayed until immediately before
the lottery, and that applicants should provide 3 preferred choices
of both 5 and 6 digit codes.
3.7 Another respondent
believed that the figures for the number of codes required in response
to the DQ questionnaire were likely to be exaggerated by 50%.
3.8 Several respondents
believed that issuing 6 digit codes from the outset gives a level playing
field for all operators wishing to provide DQ services, whenever they
enter the market.
3.9 Some operators
commented that 6 digit codes would provide a larger supply for future
demand, and provide more choice of ‘golden numbers’.
‘Golden
Numbers’ and Protection of Problematic Codes
3.10 There was general agreement that some
DQ codes are more commercially advantageous – ‘golden numbers’ – and
they should be allocated on a fair basis. However, there was no specific
agreement on which codes are ‘golden numbers’. One operator believed
that ‘golden numbers’ should be protected.
3.11 Operators agreed that certain codes
should not be allocated because of potential consumer confusion eg.
118100, 118999, or where codes have historical significance
eg 118192, 118153, etc.
3.12 One operator suggested that other
codes should be protected because of potential mis-dialling eg. Reading
code area 0118 3XX or 0118 9XX.
Application
Procedure
3.13 There was general
support by operators for having a one week period when all applications
for DQ codes should be submitted. Thereafter, applications should be
dealt with on a first come first served basis.
3.14 A couple of
respondents suggested that in order to guarantee that only genuine applicants
apply, operators should submit a bond, refundable when the DQ service
is delivered. Figures of £100k or £200k were suggested.
3.15 There was a
suggestion that companies, other than those running a public telecommunication
system under a licence granted under Section 7 of Telecommunications
Act 1984, should be able to apply for DQ codes.
3.16 Some operators
believed there should be a restriction on the numbers of codes allocated
per operator to prevent stockpiling. Also, that operators should provide
several choices per DQ code required, in case the first code choice
they have selected is not available.
3.17 Operators suggested
there should be protection against associated companies applying together
to get a greater number and a wider selection of codes between them.
Allocation
Procedure
3.18 Respondents
generally favoured a lottery process for allocation.
3.19 Operators suggested
that when allocating the DQ codes, companies should be selected at random
and each given their first choice of code, then at random again for
second code, etc. until all codes have been allocated. If the operator’s
choices of codes have already been allocated to other operators, a choice
should be offered from the remaining codes.
3.20 Other suggestions
were to set aside ‘golden number’ codes and allocate them first, or
to allocate every operator their first choice, and any clashes to be
resolved by random selection.
3.21 Operators were
not in favour of giving preference to operators to be allocated codes
that duplicate codes those operators already use in other countries.
3.22 It was questioned
whether there should be a distinction between codes used for National
DQ services (which are generally cheaper) and International DQ services.
However, there was a suggestion that this would not work as consumers
would not know the principles being used, and in addition, not all companies
would offer an International service and the responsibility of marketing
access codes/services lies with the Operator/Service Provider. It has
also been suggested that 118 access codes could be allocated in tariff
bands eg. codes in the 1181XX range could be for those services costing
10p, codes in the 1182XX range for those costing 20p.
3.23 One respondent
believed the consultation on allocation procedure for DQ codes to be
both unnecessary and time-consuming as Oftel had already consulted on
access codes for DQ services. Also, it believed that all those with
a serious interest in applying for access code(s) were attending the
DQ numbering sub-group and would therefore already have given their
views on the allocation procedure. However, the same respondent had
assumed that the consultation period would be for 3 months, instead
of the proposed 28 days.
Withdrawal
Procedure
3.24 There was general
consensus that Oftel should consider withdrawing allocated codes not
in use after a period of time eg six months. The codes should go back
into the pool for re-allocation on the first-come first-served basis.
3.25 Operators queried
how Oftel would decide whether a code was not ‘in use’. Suggestions
for ‘in use’ were: data-built on all networks; billing and interconnect
arrangements in place; and code actively marketed.
3.26 One operator
suggested that low usage should result in withdrawal of the code by
Oftel, but did not explain how this could be measured.

Chapter
4
Oftel’s Proposal
for Allocation of Codes for Directory Enquiry Services, and Necessary
Changes to the Numbering Conventions
Length of Codes
4.1 Codes allocated
for directory enquiry services will be six digits in length ie 118XXX.
Although Oftel’s Statement entitled Access codes for directory enquiry
services (September 2001) stated that Oftel will allocate 5-digit numbers
for DQ services, as a result of a general consultation with interested
parties, and discussions with the DQ numbering sub group it has become
clear that 6-digit codes are actually required in this particular case.
4.2 The main reasons
for allocating 6-digit codes are set out below:
- it provides sufficient
codes to meet current forecast demand, and allows enough codes for
future use. Responses to the DQ Questionnaire indicated that a total
of 382 codes are required for both operator’s own use and for sub-allocation.
Oftel acknowledges that the DQ Questionnaire may have over-estimated
demand, but Oftel also considers that it is equally possible that
not all operators or service providers were able to respond to the
questionnaire. Therefore, on balance, Oftel considers that the additional
code capacity obtained by using six digit codes is likely to be necessary;
- Oftel believes
that opting for 5-digits could lead to the need for some form of rationing
process. It believes that the delay that would be caused by the need
to design and consult on such a process could not be justified;
- there are more
codes available with 6-digits so operators will have a wider choice.
There will be more ‘golden numbers’ and more opportunity for sequential
numbers to be allocated to the same operator or service provider;
- by only allocating
6-digit codes from the outset (rather than 5-digit codes initially
and six digit codes subsequently if necessary), it provides a level
playing field for companies offering DQ services, no matter at what
time a company enters the market. There will also be less confusion
for the consumer, as a DQ code will always be 6-digits long;
- Oftel has seen
no objective evidence that 6-digit codes are less memorable for consumers
than five digit codes;
- the cost to the
caller of dialling an extra digit is insignificant. This was indicated
in Figure 4.2 of the cost benefit analysis (CBA) carried out by Ovum
on behalf of Oftel as part of the Consultation on access
codes for directory enquiry services (November 2000).
4.3 Oftel will change
Numbering Convention A9.6, which currently states that ‘allocation of
access codes will be on the basis of five-digit ‘1XXXX’ codes’, to allow
for 6-digit codes to be allocated for DQ services. The draft Convention
is set out in Annex A.
‘Golden
Numbers’ and Protection of Problematic Codes
4.4 Oftel recognises
that operators consider that some codes are more commercially advantageous
than others. These are commonly referred to as ‘golden numbers’. However,
such codes are not always easily identifiable because what may appear
‘golden’ to one operator may not be to another.
4.5 Oftel therefore
will not try to identify or set aside ‘golden numbers’. The lottery
process for allocation (as discussed below) will ensure that operators
are given equal opportunity to be allocated codes they consider ‘golden’.
4.6 Oftel will protect
a minimal number of DQ codes that it considers to be problematic ie
codes that may be confusing to the consumer such as 118100, 118999,
etc. and codes that have historic significance such as 118153, 118192,
118195, etc.
4.7 The full list
of available codes for full national and international directory enquiry
services (and those shown as protected) will be available on Oftel’s
Numbering web site before the start of the application procedure.
Eligibility
to Apply for Codes
4.8 As provided
in the Conventions (Conventions 2.1 and 2.2) , Oftel will only allocate
DQ codes to those operators providing publicly available telecommunications
services and running a telecommunication system under a licence granted
under Section 7 of Telecommunications Act 1984, whether that is an individual
or a class licence, containing a Numbering Arrangements Condition, or
it may consider allocating numbers to SSPs or others in demonstrably
exceptional circumstances, such as where the provider is in the process
of setting up a system.
4.9Those not eligible
to apply for allocations, but who wish to compete to provide DQ services,
should seek a sub-allocation(s) from an eligible operator.
4.10 In addition
to the standard criteria above, Oftel will normally only allocate DQ
codes to operators who have confirmed in their application that the
codes applied for will be used to provide full national DQ service or
an international DQ service (or both). Oftel will normally specify a
condition on the allocation that the code(s) must be used for the service(s)
and by the operator/service provider indicated in the application.
4.11 The definitions
of DQ service, full national DQ service, international DQ service are
shown in the Glossary.
4.12 Those companies
not eligible should apply for a sub-allocation via an eligible operator
of their choice.
Standard
Procedures
4.13 Codes for directory
enquiry services will be Type B Access Codes. The main reason for this
is that Type B codes are the only Access Codes allocated by Oftel specifically
for use by an operator or a sub-allocatee, and can be used for indirect
services.
4.14 Oftel will
change the definition of Type B access codes in Convention A9.4, and
will add a further type of Type B access code in Convention A9.9. The
Conventions will then allow for codes for DQ services to fall within
the Type B category. The draft Conventions are set out in Annex A.
4.15 Operators should
use the existing S10 Application Form to apply for DQ codes – modifications
will be made to the Form in time for the application procedure.
4.16 Any codes allocated
after the proposed DQ code allocation procedure will be on a first-come
first-served basis.
Application
Procedure
4.17 Oftel will
announce the time period during which it should receive applications
for DQ codes. The announcement will allow time for sub-allocatees to
submit orders to operators.
4.18 As discussed
above, there may be no restriction on the number of DQ codes operators
can apply for. However, Oftel will normally request the following information
to support an application for codes for DQ services:
- evidence of a
firm order(s) from the sub-allocatee eg customer order, letter from
account manager, etc. This will prevent a sub-allocatee from approaching
several operators to get more than one code for the same directory
enquiry service;
- alongside every
code applied for, the operator should indicate the company offering
the service and the nature of the service eg. Zebra Telecom plc –
Full National Directory Enquiry Service in French. This information
will be shown alongside the code on the allocation certificate to
prevent misuse of the code or trading.
4.19 Currently,
operators are asked to provide 3 choices for Type B Access Codes - this
will be the same for DQ codes. Operators should avoid duplication of
choices across the codes applied for.
4.20 Oftel will
use all reasonable endeavours to make an allocation of DQ codes within
a period of 28 calendar days, as specified in Convention 4.5.
4.21 If an operator
fails to provide all the relevant information requested on the application
form, including any information sought by Oftel during the 28-day period
following receipt of the application, that operator will not be eligible
to be entered into the initial allocation procedure and will have to
re-apply at a later date.
4.22 Operators that
have provided all the information requested in the application form
(and any clarifications subsequently sought by Oftel during the 28-day
period following receipt of the application) will be eligible for the
allocation procedure.
Allocation
Procedure – Directory Enquiry Code ‘Lottery’
4.23 Oftel will
set a date for the DQ code lottery which will be approximately 1 week
after the end of the 28 day application processing period.
4.24 Oftel will
request all applicants to send one representative to the lottery.
4.25 Oftel will
chair the lottery and it will be held at a venue designated by Oftel.
4.26 Any company
that has chosen a code as a first choice that no other company has chosen
as a first, second or third choice will be automatically allocated that
code.
4.27 Oftel will
enter the names of all remaining applicants into a ‘hat’ – including
a separate entry for each sub-allocatee.
4.28 The first company
drawn will be allocated one code from their choices, as shown on the
application form. The next company drawn will be allocated one code,
and so on until every company has been allocated one code.
4.29 A company that
has requested more than one code will go back into the hat for the next
round. The process will be repeated, and so on, until all codes have
been allocated to all companies.
4.30 At any point
in the lottery, where all the choices of a particular company have already
been allocated to other companies, the representative of that company
must select another code from those remaining before the lottery moves
on to the next company. In this situation, the representative is responsible
for selecting an alternative code on behalf of sub-allocatees as well
as on behalf of his or her own company.
4.31 No preference
will be given to companies seeking to be allocated codes that duplicate
codes they use in other countries, and Oftel will not allocate sequential
codes to companies (unless this happens through the lottery process).
4.32 Oftel will
not seek bonds from operators as such a procedure is not covered by
the Conventions, and so would not be enforceable.
4.33 Oftel will
not set bands of codes based on tariff eg. 10p codes in 1181XX, 20p
in 1182XX, etc. as this may prevent operators from changing the tariff
for their DQ service unless they change the code, which would not be
beneficial to consumers.
4.34 In the week
following the lottery, Oftel will send out an Allocation Certificate
to operators showing the code(s) allocated to that operator and its
sub-allocatees. The name of the company providing the directory enquiry
service, and the specific type of service will be shown alongside the
code. Operators are advised to only set the code up for the company
and the service shown. This should prevent misuse of the code and trading.
4.35 All allocated
directory enquiry service codes will be listed on Oftel’s website. The
name of the operator to whom the code has been allocated, together with
the specific directory enquiry service, and the name of the sub-allocatee
(where appropriate) will be shown against each code. Other codes, whether
‘Protected’ or ‘Free’ will also be shown on the website.
4.36 Only after
the end of the final week of the whole procedure will Oftel process
new or further applications for directory enquiry codes – on a first-come
first-served basis.
Withdrawal
Procedure
4.37 Oftel will
consider withdrawing directory enquiry codes, in line with the Conventions,
that are ‘not in use’ after 6 months from the date of allocation.
4.38 ‘Not in use’
is defined as:
- where the code(s)
has not been data-built on all networks;
- where no billing
and interconnect arrangements are in place;
- where the code(s)
has not been actively marketed.
4.39 Operators must
approach Oftel with a justification to change the service behind a directory
enquiry code and/or where there is a requirement to change the operator/
service provider offering the DQ service.
4.40 Oftel will
withdraw directory codes that it discovers are not being used for the
service shown on the Allocation Certificate and/or codes that have been
traded between companies (without previous agreement by Oftel).
4.41 Withdrawn directory
enquiry codes will go back into the pool of available codes and will
be allocated on a first-come first-served basis.
4.42 Operators should
inform Oftel when a code(s) is not likely to brought into use or where
it ceases to be in use, and relinquish it to Oftel so that it can be
returned to the pool of available codes

Chapter
5
Consultation
5.1 The consultation
will run for 28 working days until 28 January 2002. The 28-day period
is appropriate as a draft version of the allocation procedure has already
been presented to the DQ numbering sub-group – the main stakeholders.
Also, Oftel considers that a longer consultation period would delay
competition in the directory enquiry services market. Through this consultation,
Oftel is seeking the views of all interested parties.
5.2 Where possible,
comments should be made in writing and sent by e-mail to jonathan.dawson@oftel.gov.uk.
However, copies may also be posted or faxed to the address below. If
any interested parties are unable to respond in one of these ways, they
should discuss alternatives with the Oftel manager named below:
Jonathan Dawson
DQ Code Allocation Consultation
Numbering Unit
Oftel
50 Ludgate Hill
London EC4M 7JJ
Fax: + 44 (0)20
7634 8784
E-mail: jonathan.dawson@oftel.gov.uk
Further
copies of this document
5.3 This document
can be viewed in the Publications section of Oftel’s website (www.oftel.gov.uk),
under classification Responses to Oftel consultations. Paper copies
and more accessible formats such as large print, Braille, disc and audio
cassette can be made available on request. Please contact Oftel’s Research
and Information Unit by phoning 020 7634 8761 or by sending an e-mail
to infocent@oftel.gov.uk.
Publication
of comments made by stakeholders
5.4 On this occasion,
Oftel is not programming a formal period during which interested parties
may comment on the responses made by others. Nevertheless, in the interests
of transparency, comments will be published, except where respondents
indicate that a response, or part of it, is confidential. Respondents
are therefore asked to separate out any confidential material into a
confidential annex which
is clearly identified as
containing confidential material. Oftel will take steps to protect the
confidentiality of all such material from the moment that it is received
at Oftel’s offices. However, in the interests of transparency, respondents
should avoid applying confidential markings wherever possible.
5.5 Non confidential
responses can be viewed on Oftel’s website in the Publications section
under Responses to Oftel consultations. Comments can also be viewed
at Oftel’s Research and Information Unit. Appointments must be made
in advance by phoning 020 7634 8761 or sending an e-mail to infocent@oftel.gov.uk.
e-mail notifications
5.6
Oftel has a free e-mail based mailing list to help people stay informed
about the work that Oftel is doing. Each time an Oftel document is published
and placed on Oftel’s website at www.oftel.gov.uk, subscribers to the
list receive an e-mail alert. To register, please go to the What’s New
section of the website and access the electronic form.
Next
Steps
5.7 Following the
completion of the consultation exercise Oftel will publish a statement
setting out its conclusions.

Annex
A
Draft Changes
to the Numbering Conventions
A9.4 Type B access
codes have network-wide significance as they are used by the end users
of one public telecommunications operator to have selected calls connected
by an operator other than the one from whom they rent their telephone
line (known as ‘Indirect Access’). For example, callers might use Type
B codes to select Indirect Access providers for long distance and/or
international calls. Type B codes can also be used by callers to access
services available from their own operator’s system or another public
operator’s system. These codes are allocated by Oftel.
A9.6 Given the need
to ensure reasonable numbering capacity, allocation of access codes
will generally be on the basis of five-digit ‘1XXXX’ codes. While three-
and four-digit codes will no longer be issued, three- and four-digit
codes already in use will remain in use. Access codes may, however,
be withdrawn in accordance with Convention 6.
A9.9 There are generally
three types of Type B Access Code:
a) Access codes
used for the purpose of a direct call set-up, where the dialled
digits of the access code and the following number are treated as
a single unit, or ‘string’, by the telephone networks in setting
up the call;
b) Access codes
used as a prefix, where the second stage relies on the conveyance
of a Personal Identification Number (‘PIN’); and
c) Access codes
that are used to access services, but which are not necessarily
used in conjunction with a following number, or with a second stage
which relies on conveyance of a PIN.

Glossary
Allocation Certificate
A certificate issued
by Oftel to operators showing the number range(s) allocated to them
and signed by an Oftel employee who is authorised to do so the Director
General of Telecommunications.
Directory
Enquiry Service
A service which
provides information on telephone numbers of subscribers who have not
withheld their consent to being included in such a service, and is otherwise
in conformance with Data Protection requirements.
International
Directory Enquiry Service
A Directory Enquiry
Service which provides information to UK subscribers on allocations
of numbers from the numbering scheme(s) of at least one, probably several
major non-UK countries.
National
Directory Enquiry Service
A Directory Enquiry
Service which provides information on allocations of numbers to subscribers
from the United Kingdom numbering scheme to callers located in the United
Kingdom. A National Directory Enquiry Service shall be considered a
"full" National Directory Enquiry Service for the time being if it provides
information on the geographic numbers (starting with the digits 01 or
02) of all business and residential listings and on other numbers used
for comparable purposes to geographical numbers (e.g. 08 numbers used
for main switchboards etc), where the subject of the listing has not
withheld their permission for its inclusion.
Numbering
Conventions
The Numbering Conventions
are a set of rules and principles that govern the use, management and
allocation of numbers from the United Kingdom’s Specifed Numbering Scheme.
S10
Application Form
A form on which
eligible operators may apply for Type B Access Codes – available to
eligible operators via Oftel’s web site.
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