M30;M38 标准查询与下载



共找到 40 条与 相关的标准,共 3

This European Standard (EN) has been developed by the European Standardization Organization ETSI (European Telecommunication Standardization Institute) and specifies requirements in the telecommunications sector.

Reconfigurable Radio Systems (RRS) - Radio reconfiguration related architecture for Mobile Devices (MD) (Endorsement of the English version EN 303 095 V1.3.1 (2018-05) as a German standard)

ICS
33.060.01
CCS
M30;M38
发布
2018-09-00
实施

This Recommendation defines a coaxial cable system providing 2700 telephony channels in the frequency band 0.3 MHz to about 12.4 MHz which, according to the provisions of Recommendation J.73 [1], can alternatively be used to provide 1200 telephone channels in the frequency band 0.3 MHz to about 5.6 MHz and one TV-channel in the band of about 6 MHz to 12.3 MHz for the transmission of a vestigial sideband television signal with an effectively transmitted videofrequency band up to 5.5 MHz. The repeaters should be spaced at about 4.5 km.

12 MHz SYSTEMS ON STANDARDIZED 2.6/9.5 mm COAXIAL CABLE PAIRS

ICS
CCS
M30;M38
发布
1993-01-01
实施

This Recommendation defines a coaxial cable pair system providing 10 800 telephone channels in the frequency band of approximately 4 to 60 MHz. The system may be used for the transmission of six television signals without any telephone signal or for a mixed transmission of telephone and television signals. The nominal repeater spacing is approximately 1.5 km and can be obtained by dividing the repeater spacing of 12 MHz systems by three.

60 MHz SYSTEMS ON STANDARDIZED 2.6/9.5 mm COAXIAL CABLE PAIRS

ICS
CCS
M30;M38
发布
1993-01-01
实施

This Recommendation defines a coaxial cable pair system providing 10 800 telephone channels in the frequency band of approximately 4 to 60 MHz. The system may be used for the transmission of six television signals without any telephone signal or for a mixed transmission of telephone and television signals. The nominal repeater spacing is approximately 1.5 km and can be obtained by dividing the repeater spacing of 12 MHz systems by three.

60 MHz SYSTEMS ON STANDARDIZED 2.6/9.5 mm COAXIAL CABLE PAIRS

ICS
CCS
M30;M38
发布
1993-01-01
实施

Amplifier design technique has made it possible to provide a usable band of about 18 MHz while still keeping the repeater spacing of about 4.5 km as defined in Recommendation G.332; the CCITT has therefore defined an 18 MHz system which offers a transmitting capacity of 3600 telephone channels in the case of pure telephone application. Alternatively, the system may be used for the transmission of up to two TV channels or one TV signal plus 1800 telephone channels. Another possibility is that the bandwidth above 12 435 kHz could be used for the provision of an 8448 kbit/s digital path.

18 MHz SYSTEMS ON STANDARDIZED 2.6/9.5 mm COAXIAL CABLE PAIRS

ICS
CCS
M30;M38
发布
1993-01-01
实施

Amplifier design technique has made it possible to provide a usable band of about 18 MHz while still keeping the repeater spacing of about 4.5 km as defined in Recommendation G.332; the CCITT has therefore defined an 18 MHz system which offers a transmitting capacity of 3600 telephone channels in the case of pure telephone application. Alternatively, the system may be used for the transmission of up to two TV channels or one TV signal plus 1800 telephone channels. Another possibility is that the bandwidth above 12 435 kHz could be used for the provision of an 8448 kbit/s digital path.

18 MHz SYSTEMS ON STANDARDIZED 2.6/9.5 mm COAXIAL CABLE PAIRS

ICS
CCS
M30;M38
发布
1993-01-01
实施

The present Recommendation describes two types of systems on coaxial cable pairs providing 300 telephone channels in the approximate frequency band 0.06 to 1.3 MHz. The length of the elementary cable section is about 6 km for the first type of system and about 8 km for the second. The first is to be preferred when it is planned to equip the cable with 6 MHz repeaters later on, the second when it is planned to install systems belonging to the other family on the cable later on, i.e. the 4 MHz system, 12 MHz system or 18 MHz system.

1.3 MHz SYSTEMS ON STANDARDIZED 1.2/4.4 mm COAXIAL CABLE PAIRS

ICS
CCS
M30;M38
发布
1993-01-01
实施

The present Recommendation describes two types of systems on coaxial cable pairs providing 300 telephone channels in the approximate frequency band 0.06 to 1.3 MHz. The length of the elementary cable section is about 6 km for the first type of system and about 8 km for the second. The first is to be preferred when it is planned to equip the cable with 6 MHz repeaters later on, the second when it is planned to install systems belonging to the other family on the cable later on, i.e. the 4 MHz system, 12 MHz system or 18 MHz system.

1.3 MHz SYSTEMS ON STANDARDIZED 1.2/4.4 mm COAXIAL CABLE PAIRS

ICS
CCS
M30;M38
发布
1993-01-01
实施

The present Recommendation describes a system designed to carry a maximum of 960 carrier telephone channels on a 1.2/4.4 mm coaxial pair (see Recommendation G.622). A system of this kind is produced by halving the length of the repeater section of a 1.3 MHz system (as described in Recommendation G.341) if this length is 8 km, corresponding to a nominal repeater spacing of 4 km for a 4 MHz system.

4 MHz SYSTEMS ON STANDARDIZED 1.2/4.4 mm COAXIAL CABLE PAIRS

ICS
CCS
M30;M38
发布
1993-01-01
实施

The present Recommendation describes a system designed to carry a maximum of 960 carrier telephone channels on a 1.2/4.4 mm coaxial pair (see Recommendation G.622). A system of this kind is produced by halving the length of the repeater section of a 1.3 MHz system (as described in Recommendation G.341) if this length is 8 km, corresponding to a nominal repeater spacing of 4 km for a 4 MHz system.

4 MHz SYSTEMS ON STANDARDIZED 1.2/4.4 mm COAXIAL CABLE PAIRS

ICS
CCS
M30;M38
发布
1993-01-01
实施

The present Recommendation describes a 6 MHz system which may be used for transmitting a maximum of 1,260 telephone channels. A system of this kind can be produced by halving the length of the elementary cable section of a 1.3 MHz system (as described in Recommendation G.341) if this length is 6 km, corresponding to a nominal repeater spacing of 3 km for the 6 MHz system.

6 MHz SYSTEMS ON STANDARDIZED 1.2/4.4 mm COAXIAL CABLE PAIRS

ICS
CCS
M30;M38
发布
1993-01-01
实施

The present Recommendation describes a 6 MHz system which may be used for transmitting a maximum of 1,260 telephone channels. A system of this kind can be produced by halving the length of the elementary cable section of a 1.3 MHz system (as described in Recommendation G.341) if this length is 6 km, corresponding to a nominal repeater spacing of 3 km for the 6 MHz system.

6 MHz SYSTEMS ON STANDARDIZED 1.2/4.4 mm COAXIAL CABLE PAIRS

ICS
CCS
M30;M38
发布
1993-01-01
实施

The provisions of this Recommendation are those appearing in Recommendation G.332 for systems on 2.6/9.5 mm coaxial pair, with the exception of the following provision.

12 MHz SYSTEMS ON STANDARDIZED 1.2/4.4 mm COAXIAL CABLE PAIRS

ICS
CCS
M30;M38
发布
1993-01-01
实施

The provisions of this Recommendation are those appearing in Recommendation G.332 for systems on 2.6/9.5 mm coaxial pair, with the exception of the following provision.

12 MHz SYSTEMS ON STANDARDIZED 1.2/4.4 mm COAXIAL CABLE PAIRS

ICS
CCS
M30;M38
发布
1993-01-01
实施

The provisions of this Recommendation are those appearing in Recommendation G.334 for 18 MHz systems on 2.6/9.5 mm coaxial pair, with the exception of the following provision.

18 MHz SYSTEMS ON STANDARDIZED 1.2/4.4 mm COAXIAL CABLE PAIRS

ICS
CCS
M30;M38
发布
1993-01-01
实施

The provisions of this Recommendation are those appearing in Recommendation G.334 for 18 MHz systems on 2.6/9.5 mm coaxial pair, with the exception of the following provision.

18 MHz SYSTEMS ON STANDARDIZED 1.2/4.4 mm COAXIAL CABLE PAIRS

ICS
CCS
M30;M38
发布
1993-01-01
实施

The digital multiplex equipment described in this Recommendation is intended for use between networks using different digital hierarchies as specified in Recommendations G.702 and G.802.

Second Order Digital Multiplex Equipment Operating at 6312 kbit/s and Multiplexing Three Tributaries at 2048 kbit/s - General Aspects of Digital Transmission Systems Terminal Equipments

ICS
CCS
M30;M38
发布
1993-01-01
实施

Transmission system: all that is necessary in order to provide an adequately operational transmission path (e.g.4 kHz channel) between the terminating interfaces. It includes translating equipment, line terminal equipment, line intermediate equipment, cable, power feeding, primary power and standby power supplies and might also include the changeover equipment when automatic protection switching is provided.

RELIABILITY AND AVAILABILITY OF ANALOGUE CABLE TRANSMISSION SYSTEMS AND ASSOCIATED EQUIPMENTS

ICS
CCS
M30;M38
发布
1993-01-01
实施

Transmission system: all that is necessary in order to provide an adequately operational transmission path (e.g.4 kHz channel) between the terminating interfaces. It includes translating equipment, line terminal equipment, line intermediate equipment, cable, power feeding, primary power and standby power supplies and might also include the changeover equipment when automatic protection switching is provided.

RELIABILITY AND AVAILABILITY OF ANALOGUE CABLE TRANSMISSION SYSTEMS AND ASSOCIATED EQUIPMENTS

ICS
CCS
M30;M38
发布
1993-01-01
实施

Administrations which decide to equip their symmetric pair cable network should, wherever possible, choose those which conform to the types of cable defined below.

CHARACTERISTICS OF SYMMETRIC CABLE PAIRS FOR ANALOGUE TRANSMISSION

ICS
CCS
M30;M38
发布
1993-01-01
实施



Copyright ©2007-2022 ANTPEDIA, All Rights Reserved
京ICP备07018254号 京公网安备1101085018 电信与信息服务业务经营许可证:京ICP证110310号