Table of Contents
FOREWORD
CONTENTS
Introduction
OperationalandinterworkingrequirementsforDCEs
operatinginthetexttelephonemode
Background
1Scope
2References
3Definitions
4Operationalrequirements
5Connectingintexttelephonemodeincludingprocedures
forinterworkingwiththeinstalledbaseofexisting
texttelephones
5.1Automodingoriginating
5.2Automodinganswering
5.3Automodingmonitormode
6ConnectionintexttelephonemodewithV.8andV.8bis
procedures
6.1V.8procedures
6.2Simultaneousvoiceandtexttelephony(SVT)
6.3ConnectionproceduresbasedonITU-TV.8bis
7Bibliography
ANNEXA-5-bitoperationalmode
A.1Modeofoperation
A.2Modulation
A.3Probe
A.4Characterconversion
A.5InformativeusageinformationCE
ANNEXB-DTMFoperationalmode
B.1Modeofoperation
B.2Characterconversion
B.3Timing
ANNEXC-EDToperationalmode
C.1Modeofoperation
C.2Modulation
C.3CharactersintheEDTmode
ANNEXD-Bell103mode
D.1Modeofoperation
D.2Modulation
D.3Charactercodeandframing
D.4Presentationcontrol
D.5Usageconventions
ANNEXE-V.23Videotexterminals
E.1Minitelterminals
E.2Prestelterminals
ANNEXF-V.21texttelephonemode
F.1Modeofoperation
F.2Modulation
F.3Channelselection
F.4Charactercodeandframing
F.5Presentationcontrol
F.6Usageconventions
ANNEXG-V.18texttelephonemode
G.1Modeofoperation
G.2PresentationprotocolforV.18mode
G.3Framingandtransmission
APPENDIXI-Representativeorderingofautomoding
APPENDIXII-Recommendedcommonproceduresforterminals
usingtheV.18DCE
II.1Linestatusdisplay
II.2Connectmode
APPENDIXIII-SpecificationofV.18implementationtests
Summary
III.1Introduction
III.2Definitions
III.3Summaryoftests
III.4Interworkingtestsdescription
III.5V.18implementationtestsdescription Abstract
Describes modem procedures to follow for automatic interworking with text telephones. Specifies the signal analysis, signal transmission and logic needed to determine what kind of text telephone there is on a connection. Also specifies the actions needed to communicate in the mode supported by each terminal type. Intended to be used in text telephones, in interworking units, in text relay services, in emergency centres, and in computers to be used for text telephony in the PSTN. Specifies transmission of identification signals to determine when the connection is between two V.18-equipped terminals.
