ITU-T E.458 SPANISH-1996
传真传输性能的品质因数-电话网络和综合业务数字网(ISDN)的业务质量.网络管理和流量工程(2号研究组)6pp

Figure of Merit for Facsimile Transmission Performance - Telephone Network and ISDN Quality of Service Network Management and Traffic Engineering (Study Group 2) 6 pp

ITU-T E.458 SPANISH-1996 发布历史

The purpose of this Recommendation is to introduce metncs for Figure of Merit (FOM) for end-to-end facsimile transmission performance. The Recommendation is intended for use by Recognized Operating Agencies (ROAs) to exchange network performance data for service improvement purposes. In previous Recommendations E.45 1, E.452, E.453 and E.456, facsimile meîrics such as facsimile call cut-Offs, modem speed reduction and image quality based on scan line errors and test transactions, respectively, were defined. It would be very useful to produce simple metrics for facsimile FOM that combine all three parameters so that performance of networks can be compared easily and corrective action taken to improve performance. End-to-end facsimile performance includes performance impacts both due to the network and the facsimile terminals. However, when a fixed set of test terminals with nominal terminal performances are used, it is possible to treat the terminal performance as a constant factor and compare network performances. The impact of terminal performance on facsimile call cut-Offs, modem speed reduction and image quality are more fully discussed in Recommendations E.451. E.452 and E.453.

ITU-T E.458 SPANISH-1996由国际电信联盟 IX-ITU 发布于 1996-02-01。

ITU-T E.458 SPANISH-1996 在中国标准分类中归属于: M10 通信网综合,M11 通信网技术体制,M39 传真电报设备。

ITU-T E.458 SPANISH-1996 发布之时，引用了标准

• ITU-T E.451 传真呼叫切断性能 E系列:全面网络操作,电话服务,服务操作和人为因素 服务质量,网络管理和通信工程*， 2001-02-01 更新
• ITU-T E.452 传真调制解调速度降低和处理时间 电话网络和综合业务服务网(ISDN)服务质量,网络管理和通信工程
• ITU-T E.453 受传输诱导的行扫描误码影响的传真图象质量 电话网络和综合业务服务网(ISDN)服务质量,网络管理

* 在 ITU-T E.458 SPANISH-1996 发布之后有更新，请注意新发布标准的变化。

ITU-T E.458 SPANISH-1996的历代版本如下：

• 1996年02月01日 ITU-T E.458 SPANISH-1996 传真传输性能的品质因数-电话网络和综合业务数字网(ISDN)的业务质量.网络管理和流量工程(2号研究组)6pp

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标准号

ITU-T E.458 SPANISH-1996

发布日期

1996年02月01日

实施日期

废止日期

无

中国标准分类号

M10;M11;M39

发布单位

IX-ITU

引用标准

ITU-T E.451 ITU-T E.452 ITU-T E.453

适用范围

The purpose of this Recommendation is to introduce metncs for Figure of Merit (FOM) for end-to-end facsimile transmission performance. The Recommendation is intended for use by Recognized Operating Agencies (ROAs) to exchange network performance data for service improvement purposes. In previous Recommendations E.45 1, E.452, E.453 and E.456, facsimile meîrics such as facsimile call cut-Offs, modem speed reduction and image quality based on scan line errors and test transactions, respectively, were defined. It would be very useful to produce simple metrics for facsimile FOM that combine all three parameters so that performance of networks can be compared easily and corrective action taken to improve performance. End-to-end facsimile performance includes performance impacts both due to the network and the facsimile terminals. However, when a fixed set of test terminals with nominal terminal performances are used, it is possible to treat the terminal performance as a constant factor and compare network performances. The impact of terminal performance on facsimile call cut-Offs, modem speed reduction and image quality are more fully discussed in Recommendations E.451. E.452 and E.453.