1、I 232b414 000b477 9 W. Page 1 TJR2-02 E Recommendation T/R 21-02 (Rome 1967) CREATION OF A EUROPEAN RADIO-PAGING SERVICE Recommendation proposed by the “Radiocommunications” Working Group T/WG 3 (R) Text of the Recommendation adopted by the “Telecommunicntions” Commission: “The European Conference o
2、f Postal and Telecommunications Administrations, considering (a) that the introduction of a radio-paging system has become urgent in a number of countries, (b) that a large number of subscribers must be able to participate in this service, and that the frequency band to be (c) that it is necessary t
3、o provide a uniform Paging system for all the CEPT countries, (d) that the various contributions submitted by Administrations have been carefully studied by the Sub-Group of (e) that it is possible to draw upon the experience already acquired by various Administrations who are operating (f) that man
4、y tests have been conducted by different Administrations and the Sub-Group of Experts R6, (g) that in view of the congestion of the frequency bands concerned and the difficulty of designating frequencies which could be liberated by all Administrations for the Paging service, it is necessary to impos
5、e strict economy in the use of frequencies, (h) that the final report of Sub-Group R6 annexed * to this Recommendation proposes uniform technical characteris- tics for a European Paging service, employed should remain as narrow as possible, O Experts R6, Paging systems, recommends that the following
6、 technical characteristics should serve as a basis for Administrations wishing to establish a radio-paging service. 1. BASIC NETWORK 1.1. 1.2. Subdivision of the CEPT Nations into approximately 50 base networks. Use of one radio channel per base network; where a base network comprises several transm
7、itters, the frequencies of adjacent channels in a given base network shall be slightly offset one from another, Calls shall be transmitted to central installations by means of the public telephone network. Code numbers shall be assigned taking account of the characteristics of the various types of t
8、elephone switching equipments. 1.3. 1.4. * This report is not included in this compendium. Edition of September IS, 1988 7 2326434 0006498 O I TIR 21-02 E Page 2 1.5, 1.6. 1.7. 2. 2.1. 2.2. 2.3. 2.4. 2.5. 2.6. 3. 3.1. 3.2. 3.3. 3.4. 3.5. On acceptance of a signal by the central equipment, the emissi
9、on of an electric signal “reply from called subscriber” followed immediately by a spoken phrase consisting of the “Eurosignal” call-sign, and the name of the base network. Use of the same basic networks for both national and international calls. Selection of the location of calling centres to take a
10、ccount of the final basic network configuration with an initial capacity of 1 million different code numbers during the First Phase and the possibility of extension to 7 million. TECHNICAL CHARACTERISTICS Use of frequencies 87.340; 87.365; 87.390 and 87.415 MHz for national and international calls.
11、Possibility of using 87.290; 87.315; 87.440 and 87.465 MHz for local networks. Offset for adjacent transmitters in a base network of O, + 4 or - 4 kHz (in relation to the nominal channel value). Frequency tolerance, f 6.10-6. Amplitude modulation of transmitters with a modulation depth of 100% (+5%;
12、 - 15%). Useful field intensity in main service zone above 20 pV/m, or 5 pV/m in mountainous regions. METHOD OF CODING Code signal of six successive impulses. Impulses of 100 ms +5%. Use of 16 tones between 313.3 and 1062.9 Hz (frequency tolerance l%n) this process permits 7 million different codes.
13、 Transmission of the interval frequency-1 153.1 Hz-between successive calls. This interval shall have a duration of not less than 200 ms; during this interval the decoders should return to the rest position. Possibility of assigning several code numbers to a subscriber to enable him to receive addit
14、ional information. Possibility of repeat calls to increase the probability of success.” Edition of September 15, I - I 2326414 0006499 2 I i d - No No. 1 1 2 3 4 5 6 I 8 9 10 11 12 13 14 15 16 17 - - 18 19 20 21 22 23 24 25 26 - O o Recommandation T/R 21-02 (adopte en 1967) / Recommendation T/R 21-0
15、2 (adopted in 1967) Information de la suite donne / Information regarding implementation a = La Recommandation est applique. / The Recommendation has been implemented. b = Lapplication de la Recommandation est prvue. 1 Implementation of the Recommendation is planned. c = Lapplication de la Recommand
16、ation nest pas prvue. / Implementation of the Recommendation is not planned. Pays Countries L Allemagne (Rp. fd. d)/ Germany (Fed. Rep. of) Autriche / Airstria Belgiqiie / Belgium Chypre / Cyprirs Danemark / Denmark Espagne / Spain Finlande / Finland France Grce / Greece Irlande 1 Ireland Islande /
17、Iceland Italie / Italy Liechtenstein Lirxetnboirrg Malte / Malta Monaco Norvge 1 Norrvay Pays-Bas / Netherlands Port1rgnl Royairme-Uni I United Kingdoni Saint-Marin 1 Sari Marino Sirde / Sweden Sirisse 1 Srvitzerlatid Tiirqirie / Tirrkey Vatican (Cit) I (City) Yoirgoslavie 1 Yugoslavia Infor- mation
18、 3 b C b b C C a b C b b a 1 C b b C a C b Remarques / Remarks 4 Application partielle. / Partial implementation. I1 nest pas envisag dintroduire un service radiolectrique dappel. / No planning to introduce radio cail service. Application partielle. / Partial implementation. ) LAdministration norvgi
19、enne na pas encore pu prendre une position dfini- tive en ce qui concerne cette Recommandation. / The Norwegian Administra- tion has not yet taken a definite position. Le rseau radiolectrique dappel slectif belgo-nerlandais pourvoit aux besoins nationaux. / National needs are met by the Belgian-Dutc
20、h radio- paging network. LAdministration britannique examine encore la question sil est ncessaire dintroduire un tel service. / The British Administration is still studying whether it is necessary to introduce such a service. I1 nest pas envisag dintroduire un service radiolectrique dappel. /Does not envisage introducing such a service, Edition dii 15 septembre 1988 / Edition of September 15, 1988 i i ,
