Home>ITU Q.551:2002

ITU Q.551:2002

ITU Q.551:2002 Transmission Characteristics Of Digital Exchanges Provides values for transmission characteristics related to the path from an exchange test point to an exchange interface and vice-versa. The overall characteristics for connections involving two inte

More details

Download

PDF AVAILABLE FORMATS IMMEDIATE DOWNLOAD
$17.53 tax incl.

$39.83 tax incl.

(price reduced by 56 %)

1000 items in stock

Table of Contents

1Introduction
1.1General
1.2Definitions
2Characteristicsofinterfaces
2.1Two-wireanalogueinterfaces
2.1.1InterfaceZ
2.1.2InterfaceC[2]
2.2Four-wireanalogueinterfaces
2.2.1InterfaceC[1]
2.3Digitalinterfaces
2.3.1InterfaceA
2.3.2InterfaceB
2.3.3V-typeinterfaces
3Voice-frequencyparametersofaconnectionbetweentwo
interfacesofthesameexchange
3.1General
3.2Transmissionlossthroughtheexchange
3.3Groupdelay
3.3.1Absolutegroupdelay
3.3.2Groupdelaydistortion
3.4Noiseandtotaldistortion
3.4.1Weightednoise
3.4.2Totaldistortionincludingquantizingdistortion
3.5Crosstalk
3.6Discriminationagainstout-of-bandsignalsappliedto
theinputinterface
3.7Spuriousout-of-bandsignalsreceivedattheoutput
interface
3.8Echoandstability
4Exchangetransferfunction-jitterandwander
AnnexAInformationontheformulaeusedinthisRecommendation
tocalculateweightednoiseandsignal-to-total
distortionratio
A.1General
A.2Weightednoise
A.2.1Weightednoiseforaninputconnection
originatingfromaZ-interface
A.2.2Weightednoiseforanoutputconnection
terminatinginaZ-interface
A.2.3Weightednoiseforawholeconnection
originatingfromandterminatingina
Z-interface
A.2.4Weightednoiseforaninputconnection
originatingfroma2-wireor4-wire
C-interfacewithorwithoutsignallingon
thespeechwires
A.2.5Weightednoiseforanoutputconnection
terminatingata2-wireC-interfacewith
L[o]>=ora4-wireC-interfacebothwith
orwithoutsignallingonthespeechwires
A.2.6Weightednoiseforanoutputconnection
terminatingata2-wireC-interfacewith
L[o]<-5dBrandwithorwithoutsignalling
onthespeechwires
A.2.7Weightednoiseforawholeconnection
originatingfromandterminatingin2-wireor
4-wireC-interfaceswithorwithoutsignalling
onthespeechwires
A.3Totaldistortionincludingquantizingdistortion
A.3.1Totaldistortionincludingquantizing
distortionforaninputconnectionoriginating
fromaZ-interface
A.3.2Totaldistortionincludingquantizing
distortionforanoutputconnectionterminating
inaZ-interface
A.3.3Totaldistortionincludingquantizing
distortionforawholeconnectionoriginating
fromandterminatinginaZ-interface
A.3.4Totaldistortionincludingquantizing
distortionforaninputconnectionoriginating
froma2-wireora4-wireC-interface
A.3.5Totaldistortionincludingquantizing
distortionforawholeconnectionoriginating
fromandterminatingina2-wireora4-wire
C-interface
A.3.6Totaldistortionincludingquantizing
distortionforawholeconnectionoriginating
fromandterminatingin2-wireor4-wire
C-interfaces

Abstract

Provides values for transmission characteristics related to the path from an exchange test point to an exchange interface and vice-versa. The overall characteristics for connections involving two interfaces can in most cases be obtained by suitably combining these values.

Contact us