M31 载波通信设备 标准查询与下载



共找到 174 条与 载波通信设备 相关的标准,共 12

This Recommendation is applicable to the design of echo suppressors used on international telephone connections

ECHO SUPPRESSORS

ICS
CCS
M31
发布
1993-01-01
实施

This appendix defines a comfort noise payload format (or bit-stream) for ITU-T G.711 use in packetbased multimedia communication systems.The use of the payload format is intended for packet-based systems with a large header overhead where the packet trans

12-Channel Terminal Equipments - International Analogue Carrier Systems - General Characteristics Common to All Analogue Carrier-Transmission Systems

ICS
33.040.20
CCS
M31
发布
1993-01-01
实施

In order to ensure that multichannel carrier systems on cable and on radio-relay links shall comply with standards of performance considered as equivalent in respect of noise, the following design objectives should apply to the noise at a zero relative level point in any telephone channel having the same composition as the hypothetical reference circuit on such systems.

NOISE OBJECTIVES FOR DESIGN OF CARRIER-TRANSMISSION SYSTEMS OF 2500 km

ICS
CCS
M31
发布
1993-01-01
实施

In order to ensure that multichannel carrier systems on cable and on radio-relay links shall comply with standards of performance considered as equivalent in respect of noise, the following design objectives should apply to the noise at a zero relative level point in any telephone channel having the same composition as the hypothetical reference circuit on such systems.

NOISE OBJECTIVES FOR DESIGN OF CARRIER-TRANSMISSION SYSTEMS OF 2500 km

ICS
CCS
M31
发布
1993-01-01
实施

The characteristics of complete circuits, measured between audio-frequency terminals (overall loss in terminal service and in transit service, frequency bands effectively transmitted and attenuation distortion, variation of overall loss with time, phase distortion, stability, crosstalk, etc.) should meet the general conditions for 4-wire telephone circuits indicated in Section 1 of the Series G Recommendations.

OVERALL RECOMMENDATIONS RELATING TO CARRIER-TRANSMISSION SYSTEMS

ICS
CCS
M31
发布
1993-01-01
实施

The characteristics of complete circuits, measured between audio-frequency terminals (overall loss in terminal service and in transit service, frequency bands effectively transmitted and attenuation distortion, variation of overall loss with time, phase distortion, stability, crosstalk, etc.) should meet the general conditions for 4-wire telephone circuits indicated in Section 1 of the Series G Recommendations.

OVERALL RECOMMENDATIONS RELATING TO CARRIER-TRANSMISSION SYSTEMS

ICS
CCS
M31
发布
1993-01-01
实施

The CCITT, considering that countries not having a national industry for the construction of carrier systems must obtain them from different factories, and that the variations of the dimensions of the racks between different sources of supply do not allow of a simple and economical layout of the cables and efficient use of accommodation.

ARRANGEMENT OF CARRIER EQUIPMENT

ICS
CCS
M31
发布
1993-01-01
实施

The CCITT, considering that countries not having a national industry for the construction of carrier systems must obtain them from different factories, and that the variations of the dimensions of the racks between different sources of supply do not allow of a simple and economical layout of the cables and efficient use of accommodation.

ARRANGEMENT OF CARRIER EQUIPMENT

ICS
CCS
M31
发布
1993-01-01
实施

Single sideband power-line carrier terminals

ICS
CCS
M31
发布
1992-10
实施

General technical requirement for 22MHz (4380-channel) carrier communication system over standard 2.6/9.5mm coaxial cable pairs

ICS
33.060.40
CCS
M31
发布
1992-03-12
实施
1992-11-01

Specification for channel translating equipment used on carrier systems

ICS
33.060.40
CCS
M31
发布
1992
实施

Specification for group translating equipment used on carrier systems

ICS
33.060.40
CCS
M31
发布
1992
实施

Sealing tests for pressurized waveguide components and assemblies

ICS
33.060.40
CCS
M31
发布
1992
实施

本标准规定了农电网单边带电力线载波机的技术要求、测试方法、检验规则、标志、包装、运输和贮存要求。 本标准适用于在35kV及以下的配电线路上传输信息的单边带电力线载波机(图1)。这种电力线载波机主要为电力系统调度运行传输电话和非电话业务信号,一般是电话与非电话信号复用(图2),也可以是电话或非电话信号专用。

Specification of single sideband power line carrier termenals for power supply networks in rural area

ICS
33.060.40
CCS
M31
发布
1991-04-02
实施
1991-07-01

本标准规定了ZDD-5型系列电力线载波机的技术要求、测试方法、检验规则、标志、包装、运输和贮存要求。 本标准适用于ZDD-5型系列电力线载波机,该设备输入输出示意图。

Dual-trace oscilloscope for Type SR8

ICS
33.060.40
CCS
M31
发布
1991-04-02
实施
1991-07-01

Prezentul standard stabile?te metodele de determinare a modificaiilor dimensionale la sp?lare ale ciorapilor ?i ?osetelor din bumbac ?i tip bumbac, din fire poliamidice textul ale ?i din fire din l?n?. ?i tip lin?.

Stockings and socks. Determination of dimensional changes at washing

ICS
CCS
M31
发布
1990-11-01
实施

Prezentul standard se refer? la ciorapi ?i ?osete din fire sintetice texturate supraelas-tice, executate pe ma?ini circulare cu unu ?i doi cilindri, pentru copii, femei ?i b?rba?i.

Circular machines made stretch texturized synthetic yarn socks and stockings

ICS
CCS
M31
发布
1990-10-01
实施

that, between fixed points, telephone communications should be effected wherever possible by means of metallic conductors or radio-relay links using frequencies above 30 MHz to make the allocation of radiofrequencies less difficult and, where this can be

Use of Radio-Relay Systems for International Telephone Circuits - International Analogue Carrier Systems (Study Group XV) 1 pp

ICS
33.060.80
CCS
M31
发布
1989-01-01
实施

that between fixed points, telephone communications should be effected wherever possible by means of metallic conductors, or radio links using frequencies above 30 MHz to make the allocation of radio frequencies

Use of Radio Links in International Telephone Circuits - International Analogue Carrier Systems (Study Group XV) 3 pp

ICS
33.060.80
CCS
M31
发布
1989-01-01
实施

Use of a measuring instrument having a 5-ms time constant (integrating time) is recommended so as to detect, in particular, the presence of short high-level noise bursts, such as those caused by power supplies and by the equipment. Administrations should

Radio-Relay System Design Objectives for Noise at the Far End of a Hypothetical Reference Circuit with Reference to Telegraphy Transmission - International Analogue Carrier Systems (Study Group XV) 1 pp

ICS
35.200
CCS
M31
发布
1989-01-01
实施



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