M30 通信设备综合 标准查询与下载

ITU-R P.1546-5-2013 30 MHz-3 000 MHz频率范围内地面业务的点对区域预测的方法

This Recommendation describes a method for point-to-area radio propagation predictions for terrestrial services in the frequency range 30 MHz to 3 000 MHz. It is intended for use on tropospheric radio circuits over land paths, sea paths and/or mixed land-sea paths up to 1 000 km length for effective transmitting antenna heights less than 3 000 m. The method is based on interpolation/extrapolation from empirically derived field-strength curves as functions of distance, antenna height, frequency and percentage time. The calculation procedure also includes corrections to the results obtained from this interpolation/extrapolation to account for terrain clearance and terminal clutter obstructions.

Method for point-to-area predictions for terrestrial services in the frequency range 30 MHz to 3 000 MHz

ITU-T G.998.1 AMD 1-2013 (预发布)基于异步传输模式的多配偶键.修改件1

Amendment 1 to Recommendation ITU-T G.998.1 (2005) includes: A new clause 12 defining “Intentional Temporary Shutdown of Some Bonded Lines” (new functionality).

(Pre-Published) ATM-based multi-pair bonding Amendment 1

ITU-T G.993.2 AMD 4-2013 (预发布)高速数字用户线路收发器2(ADSL2).修改件4

Amendment 4 to Recommendation ITU-T G.993.2 (2011) covers the following functionalities: 1. Accuracy of test parameters (clarification); 2.Size of INP_min field for use with G.998.4 (corrigendum); 3. European Limit PSD Mask B8-18 for Bandplan 998E17 (new functionality).

Very high speed digital subscriber line transceivers 2 (VDSL2) Amendment 4 – European limit PSD mask B8-18 for band plan 998E17 (Study Group 15)

ITU-T G.783 AMD 4-2013 (预发布)同步数字系列(SDH)设备功能块的特性.修改件4

This amendment 4 contains modified text to be added to complete G.783 in respect of STM256 multilane interfaces.

Characteristics of synchronous digital hierarchy (SDH) equipment functional blocks Amendment 4: Text additions to add the required OSM256.4/RSn_A adaptation function for OSM256.4 interface support (Study Group 15)

ITU-T G.8021 AMD 2-2013 (预发布)以太网传输网络设备功能块的特点.修改件2

Amendment 2 to Recommendation ITU-T G.8021/Y.1341 (2012) updates the description concerning performance measurement functions. It also covers the update of ETH sublayering model, and MIP OAM extraction process.

(Pre-Published) Characteristics of Ethernet transport network equipment functional blocks Amendment 2

ITU-T G.993.5 AMD 4-2013 与超高速数字用户线收发器2(VDSL2)配套使用的自行远端串音消除(定向).修改件4.15号研究组

Amendment 4 to Recommendation ITU-T G.993.5 (2010) covers the following corrigendum and new functionality: 1. Pilot sequence update during Showtime (corrigendum); 2. Extended duration of O-P-VECTOR 1 (new functionality).

Self-FEXT cancellation (vectoring) for use with VDSL2 transceivers Amendment 4 Study Group 15

ITU-T G.998.3 AMD 1-2013 (预发布)使用时分反向复用的多配偶键.修改件1

Amendment 1 to Recommendation ITU-T G.998.3 (2005) includes: A new clause 16 defining “Intentional Temporary Shutdown of Some Bonded Lines” (new functionality).

Multi-pair bonding using time-division inverse multiplexing Amendment 1 – Intentional temporary shutdown of some bonded lines (Study Group 15)

ITU-T G.998.2 AMD 3-2013 (预发布)基于以太网的多配偶键.修改件3

Amendment 3 to Recommendation ITU-T G.998.2 (2005) includes: A new clause 9 defining “Intentional Temporary Shutdown of Some Bonded Lines” (new functionality).

Ethernet-based multi-pair bonding Amendment 3 – Intentional temporary shutdown of some bonded lines (Study Group 15)

ITU-T G.9962 AMD 1-2013 (预发布)基于统一高速线路的家庭联网收发器.管理规范.修改件1

Amendment 1 to Recommendation ITU-T G.9962 (2013) adds diagnostic facilities.

(Pre-Published) Unified high-speed wire-line based home networking transceivers - management specification Amendment 1

ITU-T G.992.3 CORR 3-2013 非对称数字用户线路收发器2(ADSL2).勘误表3:测试参数(规范)的准确性.15号研究组

Corrigendum 3 to Recommendation ITU-T G.992.3 (2009) covers the following functionality: Accuracy of test parameters (clarification).

Asymmetric digital subscriber line transceivers 2 (ADSL2) Corrigendum 3: Accuracy of test parameters (clarification) (Study Group 15)

ITU-T G.996.2 AMD 4-2013 (预发布)数字用户线(DSL)单端线测试修改件4

Amendment 4 to Recommendation ITU-T G.996.2 (2009) provides the following updates to Annex E:? accuracy values for multi-component 4-element resistance and 3-element capacitance parameters in MELT-PMD? a definition on dealing with the xDSL input capacitance during measurements.

Single-ended line testing for digital subscriber lines (DSL) Amendment 4: Updates to Annex E (Study Group 15)

ITU-T G.9905-2013 (预发布)基于集中式量度的源路由选择

This Recommendation specifies CMSR (Centralized Metric based Source Routing), a proactive, Layer 2 multi-hop routing protocol.

Centralized metric-based source routing (Study Group 15)

YD/T 2578.3-2013 LTE FDD数字蜂窝移动通信网 终端设备测试方法（第一阶段） 第3部分：无线资源管理性能测试

本部分主要规定了LTE FDD数字蜂窝移动通信网终端设备 ((UE) 无线资源管理性能测试方法。 本部分适用 于所有第一阶段LTE FDD数字蜂窗移动通信网终端设备。

LTE FDD digital cellular mobile communication network terminal equipment test method (first stage) Part 3: Radio resource management performance test

YD/T 2577-2013 LTE FDD数字蜂窝移动通信网 终端设备技术要求（第一阶段）

Technical Requirements for Terminal Equipment of LTE FDD Digital Cellular Mobile Communication Network (Phase 1)

YD/T 2576.5-2013 TD-LTE数字蜂窝移动通信网 终端设备测试方法（第一阶段） 第5部分：网络兼容性测试

YD/T 2576.5—2013 TD-LTE数字蜂窝移动通信网 终端设备测试方法(第_阶段) 第5部分= 网络兼容性测试

TD-LTE Digital Cellular Mobile Communication Network Terminal Equipment Test Method (Phase 1) Part 5: Network Compatibility Test

YD/T 2578.2-2013 LTE FDD数字蜂窝移动通信网 终端设备测试方法（第一阶段） 第2部分：无线射频性能测试

LTE FDD digital cellular mobile communication network terminal equipment test method (first phase) Part 2: Radio frequency performance test

YD/T 2578.5-2013 LTE FDD数字蜂窝移动通信网 终端设备测试方法（第一阶段） 第5部分：网络兼容性测试

LTE FDD Digital Cellular Mobile Communication Network Terminal Equipment Test Method (Phase 1) Part 5: Network Compatibility Test

YD/T 2579-2013 LTE FDD/WCDMA/GSM（GPRS）多模单待终端设备技术要求

LTE FDD/WCDMA/GSM (GPRS) multi-mode single-standby terminal equipment technical requirements

YD/T 2580-2013 LTE FDD/WCDMA/GSM（GPRS）多模单待终端设备测试方法

LTE FDD/WCDMA/GSM (GPRS) multi-mode single-standby terminal equipment test method

YD/T 2576.4-2013 TD-LTE数字蜂窝移动通信网 终端设备测试方法（第一阶段） 第4部分：协议一致性测试

TD-LTE Digital Cellular Mobile Communication Network Terminal Equipment Test Method (Phase 1) Part 4: Protocol Conformance Test