1、CEPT T/CS*34-LO*E 82 2326434 O004684 9 r Page 1 (3 TCS34-10E Recommendation TICS 34-10 (Vienna 1982) CARD PAYPHONE Recommendation proposed by Working Group T/WG 11 “Switching and Signalling” (CS) Text of the Recommendation adopted by the “Telecommuriicatioils” Commission: “The European Conference of
2、 Postal and Telecommunications Administrations, considering - that a great diversity of payphone systems and models exist with the consequent disadvantages for the travelling - the T/SF Recommendation l on card payphones; - that at least functional harmonisation of the technical requirements for car
3、d payphones should be aimed at; - that there is still a need for such harmonisation in an analogue environment; - that a limited market allowing only small scale production is disadvantageous for the industry supplying the customer; equipment and the members, O recommends that members of the CEPT us
4、e the following technical specifications when introducing new card payphones.” 1. GENERAL This specication contains the requirements for a payphone system to be used in analogue networks. The payment for the call is performed by use of a card in which a predetermined number of charge units are store
5、d. Provision is made to take into account the different types of calls and the different charging methods used by the Administrations. The credit on the card is expressed in debit units and is indicated to the user on a dispIay after insertion of the card into the payphone. The credit is reduced whe
6、n the card is used for making telephone calls, the number of debit units necessary for each call being progressively removed from the initial amount on the card. The technology of the card and the card reader is not specied, but the specification allows the use of different technologies, provided th
7、at the reliability and security requirements are met. The specification contains the requirements which are common in all applications. In addition, it contains a list of parameters which must be specified by the Administration in order to fdfl the requirements in a O specific application. 2. FUNCTI
8、ONAL AND OPERATIONAL CHARACTERISTICS 2.1. General The purpose of this Section is to describe the operation of the payphone as it is seen by the user and by the network. In the following paragraphs the main functions of the payphone are listed, divided into the following categories: i) control functi
9、ons; U) charging functions; iii) means of payment functions; iv) display functions; v) Administration functions. These categories have no significance in regard to the implementation of the payphone. A logigram (SDL-diagram) shown, in Figures 1 (34-10) to 3 (34-lo), using the rules given in CCITT Re
10、commendations 2.101 2, 102 3, and 104 4, describes the operation of the payphone in some detail. The logigram is intended to provide an explanation of the specified features for the identified functions and, at the same time it represents an example of payphone system implementations; on this (assum
11、ption) basis, each individual Administration can take into account the logigram to the extent the adopted technical realisation allows, and so avoid reference to logic sequences described. Such sequences are not foreseen for technical constraints or for different choices. Edition of May 15, 1986 d -
12、 CEPT T/CS*34-10*E 2 2326414 0004b5 O W TICC 34-10 E Page 2 The logigram is divided into sections labelled separately Control, Charging, and Means of Payment: these divisions have no significance as regards implementation. Note: For paragraphs where no relevant international specifications are avail
13、able (e.g. mechanics and environmental requirements) the Administrations should require the manufacturers to comply with their national standards. 2.2. Control functions 2.2.1. Functions Figure 1 (34-10) shows the main control functions. They are as follows. i) Detect off-hook and enable the telepho
14、ne circuit for an incoming or outgoing call. Note: Not all Administrations allow incoming calls to payphones. ii) Send dialled information to the network and to the called number display, if provided, as soon as possible. iii) Analyse dialled number into the following categories: (a) free cais with
15、recognition tone, if provided; (b) free calls without recognition tone; (c) emergency calls; (d) barred calls; (e) charged calls. iv) For charged calls, determine the parameters listed in 0 2.2.2. (a) from a table. In the case, e.g. of a barred call or less than the minimum credit available, release
16、 the call immediately, and give information (e.g. busy tone) to the user. Recognise the beginning of the speech phase: (a) for incoming calls, from the incoming call detector and off-hook condition; (b) for outgoing charged calls, from the first meter pulse (or from the answer signal, if one is prov
17、ided) ; (c) for free calls, from end of sending the dialled digits (or from the answer signal, if one is provided). vi) Initiate recognition tone when the speech phase is entered, according to the type of call. VU) Control the line cutting process: (a) when the handset is replaced; (b) when the cred
18、it is fnished; (c) if certain types of failures, including error or fraud, are detected. The actions at the end of the call (after replacing the handset) are: - cut the line; - return the card. Alternatively, a follot-on-call button may be provided to avoid replacing the handset. established: - if t
19、here is a major fault, or - if there is any other system failure, or - if the user operates the payphone incorrectly. Parameters needed for correct operation of the control functions (a) The digits dialled are analysed into categories, see 0 2.2.1. i) The parameters provided by the control logic for
20、 the charging logic are defined here. Debit Unit is the basic unit by which the credit value can be decreased. v) viu) Monitor the correct operation of the payphone during all stages of the call, and end the call already 2.2.2. i) Initial charge U) Initial charge period iii) Unit charge iv) Minimum
21、credit The number of debit units charged when the first meter pulse is received. The number of meter pulse periods paid for by the initial charge. The number of debit units charged for each meter pulse period after the initial charge period. The minimum number of debit units, which must be available
22、, to allow the call to be connected. This is always equal to or larger than the initial charge. (b) For each outgoing free call category, whether or not the recognition tone is to be applied. (c) For incoming calls, the duration of the recognition tone after off-hook. (d) The minimum time that must
23、elapse from sending a forward-clear signal before the next seizure, to allow the exchange equipment to release. (e) Whether or not incoming calls are allowed. I , Edition of May 15, 1986 CEPT T/CS*34-10*E 2 = 2326414 0004686 2 _ 2.3. 2.3.1. 2.3.2. O 2.4. 2.4.1. TICS 34-10 E Page 3 Edition of May 15,
24、 1986 Charging functions Basic Jitnctions The general operation of the charging process is shown in Figure 2 (T/CS 34-10). i) Detect insertion of card and initiate card reading process; check that the card is valid and the card code is acceptable. ii) Read, store, and display outstanding credit, whe
25、n a card is inserted. Update the credit display throughout the call. iii) Check that the card contains the minimum credit necessary to initiate a call. iv) Count meter pulses from the network, calculate the speed, according to the charging rule corresponding to the call in progress, at which the car
26、d should be debited. Debit the card, if there is no credit carried forward from a previous card (this last condition applies to systems in which only one card can be inserted at a time). v) Produce virtual meter pulses as required. vi) Start and stop the credit expiry warning period and send paytone
27、. Initiate visual warning and enable the card changing process, where this is required (e.g. system with only one card slot). Parameters needed for charging Jiinction (a) Credit expiry warning time. (b) The minimum time between the forward-clear signal and the expected arrival of the next meter puls
28、e, if the credit is zero (for some Administrations this parameter will not be needed). (c) International virtual meter pulse requirements (for internal timing of call). (d) Maximum and minimum meter pulse rate (where applicable). (e) Is user button necessary for card changing (see Q 2.3.1. vi). (0 W
29、hich credit information should be displayed, e.g. number of pulses, money value, conversation time. Means of payment functions The detailed operation is shown in Figure 3 (T/CS 34-10). The analysis is related to a solution in which the technology of the card is a step-by-step type. Functions 1. To i
30、nitialise the reader(s) and to keep the card(s) locked when it (they) is(are) introduced into the slot(s) 2. To activate an auto-test procedure in order to verify the performance of the reader($, when the card(s) 3. To read the card code(s) of the card) inserted, and to identify the telephone card i
31、tself. 4. To read the credit value of the card). This function is performed in the step-by-step technology card either: - By physically or electrically advancing the reader from the starting position to the rst bit available, if an end of message has not been received in the meantime, or - by an add
32、ressed scanning (e.g. according to a fixed map) of the erasable units. The credit value is the total value, if it is possible to insert two cards. Three cases are possible: (a) credit O, if card is valid and contains debit units; (b) credit = O, if card is valid but empty; (c) invalid card. (it is p
33、ossible to have one or two slots in the telephone set, according to different realisations). is(are) introduced into the slot(s). 5. To increment the total counter of erased debit units each time a unit is cleared, if required. 6. To provide the ejection of the card(s) in the case of power feeding f
34、ailure in the reader device. Alternatively, this feature can be realised by means of a mechanical button, in case of failure in the ejection device. 7. To clear all units when the card changing process is activated. This function is performed only by the payphones which, in order to allow the user t
35、o prolong the call by inserting a new card in the same slot, has to provide a storage of the remaining debit units of the card in operation. _I- CEPT T/CS*34-LO*E 82 232b4L4 0004bA7 4-K TICS 34-10 E Page 4 (8 hook foiled On-hook On-hook actions act ions pki-1 ac t ions fail Initiate On hook oc ti on
36、s control e) E payment payment u digit ilinel Display coiled numb r , Na tr?k Initial charge Initial charge period Unit charge Credit timer Invite payment Act ive payment Yes (1) According Administration requirements. * Or active if B-answer signal. * Or folloiv-on-cull-button action (1). Active D E
37、dition of May 15, 1986 TICS 34-10 E Page 5 Speech phase actions at t ions Recog. tone on ON HOOK ACTIONS Fail el Figure 1 (T/CS 34-10). Control Functions. Edition of May 15, 1986 CEPT T/CS*34-10*E 82 W 2326434 0004b9 W TICS 34-10 E Page 6 : . e O Edition of May 15, 1986 - CEPT T/CS*34-10*E 2 m 23264
38、34 0004690 4 m Edition of May 15, 1986 - CEPT T/CS*34-LO*E 2 W 232b4140004b71 b W TICC 34-10 E Page 8 I I Edition of May 15, 1986 CEPT T/CS*3Y-LO*E 82 a 232bYLY 0004692 8 TICS 34-10 E Page 9 2.4.2. 2.5. 2.6. 3. 3.1. 3.1.1. 3.1.2. 3.1.3. Parameters needed for the means of payment Jimction 1. number o
39、f cards, which can be inserted at the same time (e.g. 1 or 2); 2. number of readers; 3. number of slots; 4. length of the card code, etc.; 5. number of debit units on the card; 6. mechanical ejection button provided. Display function The display function should primarily give visual information conc
40、erning outstanding credit in terms of - taxation units, or - money. This should be done in both off-hook and on-hook positions. The display may be used for visual warning to the user, e.g. by flashing to indicate: - insufficient credit; - expiry period (along with warning tone), etc. The display may
41、 also be used for maintenance and testing purposes to give information during an on-site test. The same display may be used to show the dialled number. In this case, there should be a clear indication of what is being shown on the display. The multiple use of the display must not cause confusion to
42、the user. Administration functions 1. Provide data for administrative, statistical, commercial, and maintenance purposes and make them available for further processing. 2. Optional function: Capability to change programmable elements (such as change of tariff, numbering plan, charging of local call
43、in time) from a centralised position located at the exchange or at a higher level (operation and maintenance centre or administrative EDP centre). TELEPHONE CIRCUIT Different national standards for telephone circuits exist in Europe. This applies to the transmission part as well as the logic part. A
44、s far as the logic part is concerned, a special solution for payphones is possible. However, this will not be the case for the transmission part. As long as a carbon microphone is used, standardisation will not be possible. Therefore, a standard payphone using a carbon microphone must be developed i
45、n such a manner that easy adaptation to national standards is possible. Preference, however, will be given to modern transmission circuits with a dynamic microphone. The telephone circuit can be split into two main parts: 1. normal speech. circuit (transmission part, polarity independence); 2. telep
46、hone circuit functions (logic part and feeding). Because all the logic in the circuit can have infuence on the transmission part, the transmission aspects of the logic are meant to be included in the transmission part. Normal speech circuit Sending sensitivity The sending sensitivity is the relation
47、ship between sound level near the microphone and the electrical signal on the line connectors of the telephone circuit. For the required relative sensitivity, national standards must be complied with. Measuring methods must be in accordance with CCITT Recommendations. The feeding attenuation may not
48、 be more than 0.5 dB at loop resistance between O and 1,000 Ohms. Receiving sensitivity The receiving sensitivity of a telephone circuit is the relationship between the original level on the line connectors and the sound level in an artificial ear (preferably not leaky, 6 cm3). For the required rela
49、tive sensitivity, national standards must be complied with. Side tone A hybrid is used to suppress the electrical transport of energy from microphone to telephone. A side tone is needed for ergonomic reasons. The level depends on the line characteristics in relation to the hybrid balance. It must be possible to match the balance to the specific line conditions that can be met in the European network. Edition of May 15, 1986 CEPT T/CS*34-10*E 82 = 232b4L4 0004b93 T 9 TICC 34-10 E Page 10 3.1.4. 3.1.5. 3.1.5.1. 3.1.5.2. 3.1.6. 3.1.7. 3.1.8. 3
