1、BRITISH STANDARD BS 7983:2001 Requirements for payphones for networks other than the ISDN ICS 33.050.10 NO COPYING WITHOUT BSI PERMISSION EXCEPT AS PERMITTED BY COPYRIGHT LAWBS 7983:2001 This British Standard, having been prepared under the direction of the DISC Committee, was published under the au
2、thority of the Standards Committee and comes into effect on 15 May 2001 BSI 05-2001 The following BSI references relate to the work on this standard: Committee reference TCT/2 Draft for comment 00/632002 DC ISBN 0 580 33285 3 Committees responsible for this British Standard The preparation of this B
3、ritish Standard was entrusted to Technical Committee TCT/2, Analogue telecommunication networks, upon which the following bodies were represented: British Approvals Board for Telecommunications British Association of the Hard of Hearing British Telecommunications Plc Cable and Wireless Communication
4、s Plc Consumer Policy Committee of BSI Communications Workers Union DTI Communications Information Industries Directorate Federation of the Electronics Industries Kingston Communications (Hull) Plc Telecommunications Industries Association Telecommunications Users Association (TUA) Amendment issued
5、since publication Amd. No. Date CommentsBS 7983:2001 BSI 05-2001 i Contents Page Committees responsible Inside front cover Foreword ii 1S c o p e 1 2 Normative references 1 3 Definitions and abbreviations 1 4 Emergency access 2 5 Dialling 3 6K e y p a d 3 7 Message functions 4 8 Charging and payment
6、 5 9 Features for users with special needs 6 10 Socket provision 6 11 Information to be provided 6 Annex A (normative) 7 Annex B (informative) 10 Annex C (normative) 11 Annex D (informative) 11 Annex E (informative) 13 Annex F (informative) 13 Bibliography 15 Figure A.1 Circuit for measurement of tr
7、ansmission characteristics 7 Figure A.2 Insertion loss test arrangement for the d.c. feeding circuit 8 Figure A.3 Maximum limit for insertion loss 8 Figure A.4 Return loss test arrangement for the d.c. feeding circuit 9 Figure A.5 Minimum limit for return loss 9 Figure A.6 Terminating impedance 10BS
8、 7983:2001 ii BSI 05-2001 Foreword This British Standard has been prepared by Technical Committee TCT/2, Analogue telecommunication networks. The requirements specified in this standard are additional to any requirements for access or voice telephony that may be imposed under any regulatory regime a
9、s a condition of connection to the public telecommunications network. In particular, attention is drawn to the Telecommunications Act 1984 1) . A British Standard does not purport to include all the necessary provisions of a contract. Users of British Standards are responsible for their correct appl
10、ication. Compliance with a British Standard does not of itself confer immunity from legal obligations. Summary of pages This document comprises a front cover, an inside front cover, pages i and ii, pages 1 to 15 and a back cover. The BSI copyright notice displayed in this document indicates when the
11、 document was last issued. 1)The Telecommunications Act 1984 is available from The Stationery Office, PO Box 29, St Crispins House, Duke Street, Norwich NR3 1GN. BS 7983:2001 BSI 05-2001 1 1 Scope This British Standard specifies requirements for payphone apparatus: a) for connection to analogue PSTN
12、 lines (or equivalent interfaces provided behind a PABX); b) for connection to a cellular radio network; or c) that forms part of a public network (for example, public call boxes). This British Standard is also applicable to any discrete payphone facility provided by serially-connected apparatus tha
13、t supplies a connection by means of a socket conforming to BS 6312-2. This standard is intended for use by payphone manufacturers, suppliers and service providers. Requirements for network access or speech performance are outside the scope of this standard. This standard does also not apply to payph
14、ones for connection to the ISDN. NOTE Requirements for payphones for connection to the ISDN are given in I-ETS 300 400. 2 Normative references The following normative documents contain provisions which, through reference in this text, constitute provisions of this British Standard. For dated referen
15、ces, subsequent amendments to, or revisions of, any of these publications do not apply. For undated references, the latest edition of the publication referred to applies. BS 7940, Analogue PSTN terminal support interface. ETS 300 001, Attachments to Public Switched Telephone Network (PSTN) General t
16、echnical requirements for equipment connected to an analogue subscriber interface in the PSTN. ETS 300 381, Telephony for hearing impaired people Inductive coupling of telephone earphones to hearing aids. ETS 300 488, Terminal Equipment (TE) Telephony for hearing impaired people Characteristics of t
17、elephone sets that provide additional receiving amplification for the benefit of the hearing impaired. ETS 300 640, Human Factors (HF) Assignment of alphabetic letters to digits on standard telephone keypad arrays. ETS 300 679, Terminal Equipment (TE) Telephony for the hearing impaired Electrical co
18、upling of telephone sets to hearing aids. ITU-T Recommendation P.51 (1993), Telephone transmission quality Objective measuring apparatus Artificial Mouth. ITU-T Recommendation P.57 (1993), Telephone transmission quality Objective measuring apparatus Artificial Ears. ITU-T Recommendation E.161 (1993)
19、, Telephone network and ISDN Operation, numbering, routing and mobile service Arrangement of digits, letters and symbols on telephones and other devices that can be used for gaining access to a telephone network. 3 Definitions and abbreviations For the purposes of this standard, the following defini
20、tions and abbreviations apply. 3.1 Definitions 3.1.1 operator notification tone tone transmitted to the network by a payphone when a call from a payphone to the operator is established, to identify that the calling apparatus is a payphone 3.1.2 payphone apparatus which, after the provision of paymen
21、t by any means such as by coins, pre-paid cards or credit/debit cards, permits outgoing calls to the network that provides the service NOTE This does not preclude the provision of certain calls without payment.BS 7983:2001 2 BSI 05-2001 3.1.3 payphone identification tone tone transmitted to the netw
22、ork by the payphone when called to identify that the answering apparatus is a payphone 3.1.4 power fail failure of the local mains power supply NOTE Failure of internal batteries or of the exchange line d.c. supply are not included in this definition. 3.1.5 public emergency services services that ar
23、e accessed by dialling, for example, 999 or 112 3.1.6 public switched telephone network nationwide public telephone network comprising interconnected telephone exchanges capable of switching telephone calls between telephones connected to the network 3.2 Abbreviations and units 4 Emergency access 4.
24、1 Emergency service access without charge Apparatus that can be used to make voice calls over a public switched network shall permit calls to the public emergency services without the need for payment to be proffered. Conformity shall be demonstrated by simulating a successful call to all emergency
25、service numbers without proffering payment. 4.2 Continuity of emergency service access After dialling the emergency services number and before termination of the call by the user, real-time two-way speech shall be supported. Any digits signalled to the network may disrupt transmission only while the
26、y are being signalled. Conformity shall be demonstrated by simulating a successful call to all emergency service numbers without proffering payment. 4.3 Emergency service access under power fail conditions Under power fail conditions, apparatus that can be used to make voice calls over a public swit
27、ched network shall provide the functions necessary to support calls to the emergency services and real-time two-way speech without the need to proffer payment. Conformity shall be demonstrated by disconnecting any external source of power and simulating a successful call to all emergency service num
28、bers without proffering payment. CHV Card holder verification DTMF Dual-tone multi-frequency IC Integrated circuit ISDN Integrated services digital network PABX Private automatic branch exchange PNO Public network operator PSTN Public switched telephone network TE Terminal equipment dBPa Absolute so
29、und pressure level with respect to 1 Pa, expressed in decibels (dB)BS 7983:2001 BSI 05-2001 3 4.4 Barring of emergency service access The support of calls to the emergency services and of real-time two-way speech without the need to proffer payment shall not be impaired by any call-barring function
30、available to the user or owner. NOTE Functions are not considered to be available if their controls can be operated only after the release of software locks which require the use of detailed knowledge not available to the user or owner. Conformity shall be demonstrated by failure to bar calls to all
31、 emergency service numbers when using the normal barring procedure described in the telephone user instructions. 5 Dialling 5.1 Time dialling The apparatus shall provide a DTMF signalling facility. NOTE Addresses may be up to 26 digits, composed of four digits for supplementary service, four digits
32、for indirect access, three digits for international access and 15 digits for international numbers. Conformity shall be demonstrated by successfully signalling using DTMF. 5.2 Loop disconnect dialling (pulse/tone switching) Where the call is set up using loop disconnect dialling, the apparatus shall
33、 be configurable to enable switching to DTMF signalling following call set-up, after the receipt of an answer signal or the pressing of the pay on answer button (if applicable). Conformity shall be demonstrated by successfully signalling using DTMF during a call which was set up using loop disconnec
34、t dialling. 6 Keypad 6.1 Layout The layout of any telephone numeric keypad shall conform to ITU-T Recommendation E.161 and use the standard 3 4 (12 key) keypad array marked with the numbers 0 to 9, * and #. NOTE 1 The use of matt keypads with contrasting symbols would be of assistance to users with
35、impaired vision. NOTE 2 To assist disabled users, the pitch between the centres of keys should be at least 18 mm. NOTE 3 Any additional function keys should be readily distinguishable by their position or shape. 6.2 Tactile identifier The “5” key shall be provided with a tactile identifier. NOTE Typ
36、ically the tactile identifier consists of a raised “dot” nominally with a base diameter of 1.5 mm and a height of 0.5 mm, or a raised feature around the key. 6.3 Alphabetic marking Where the keypad is marked with alphabetic letters in addition to numbers, the relationship between the letters and the
37、 numbers shall meet the requirements of ETS 300 640.BS 7983:2001 4 BSI 05-2001 7 Message functions NOTE 1 Messages of various kinds are generally necessary in a payphone to give guidance and feedback to the user. These messages may be internally-generated in response to a number of possible stimuli,
38、 such as the condition of any internal logic or a signal derived from a key or other control device. Messages may also be generated in response to a message received from an IC card, a message from the network or a message from the payphone service provider received, for example, over a modem. Messa
39、ges may be presented to the user as an audible signal in the form of a tone or a spoken message, as a visual display in the form of a symbol or as an alphanumeric message, or even in a tactile manner in the form of Braille or other format for people with serious sight problems. NOTE 2 A display is o
40、f assistance to people with disabilities as it can permit, for example, a check that the correct number has been dialled. No function should be dependent on the use of the display. Further features for users with special needs are included in clause 9. NOTE 3 The display characters should be at leas
41、t 9 mm high and in a bold typeface. There should be a strong contrast between the characters and the background. The use of combinations of blue, green and violet should be avoided. 7.1 Provision of messages The provision of messages is optional. Where a message is provided, it shall be consistent w
42、ith its stimulus. Conformity shall be demonstrated by causing a message to be provided using the appropriate stimulus. NOTE 1 It is preferable that a set of basic messages should be provided, associated as necessary with specified signals received by the payphone from, for example, the network or an
43、 IC card. It should be possible to suppress the display of personal data. Typical messages may include, but are not restricted to: “Insert payment”; “Insert your card”; “Remove your card”; “Enter your number”; “Try again”; “Emergency calls only”. NOTE 2 It is recommended that at least two languages
44、are supported, one of which should be English. Guidance on language selection is given in BS EN 726-4. 7.2 Audio messages 7.2.1 Speech messages originated by the payphone shall be presented at the ear at a level of 5 dBPa 6 dBPa mean speech power while active, when the receive loudness rating is at
45、the nominal value. Conformity shall be demonstrated according to A.2. 7.2.2 Audible tones originated by the payphone shall be presented at the ear at a level of 14 dBPa 4 dBPa when the receive loudness rating is at the nominal value. Conformity shall be demonstrated according to A.3.BS 7983:2001 BSI
46、 05-2001 5 7.3 Payphone tones 7.3.1 The provision of an operator notification tone or payphone identification tone is optional but where either is provided, it shall conform to the requirements of Annex C. NOTE 1 Incorporation of an operator notification tone avoids operator-connected calls for whic
47、h no payment has been made. The incorporation of a payphone identification tone may enable PNO telephone operators to exclude transfer charge calls to such apparatus. NOTE 2 The frequencies and transmission levels specified in Annex C may be used in any combination and sequence for other purposes, p
48、rovided that the resultant cadence is significantly different from those specified in Annex C. Conformity shall be demonstrated according to A.4. 7.3.2 Where an operator notification tone is provided, it shall be applied either: a) for 10 s 1 s after the call has been answered; or b) for a period co
49、mmencing within 1 s of the payphone sending the last digit of the number giving access to the operator and shall persist for 25 s 1 s. Conformity shall be demonstrated according to A.5. 7.3.3 Where a payphone identification tone is provided, it shall be applied for a period commencing within 1 s of the call being answered and persist for at least 10 s 1 s. Conformity shall be demonstrated according to A.6. 8 Charging and payment 8.1 Charging Information on charging is given in Annex E. 8.2 Payment
