�1����
Scope�
�2���� References�
�3���� Definitions��
�4����
Abbreviations���
�5����
Introduction������
������� 5.1����
Overview
of Text over IP��
������� 5.2����
ToIP
system architecture����
������� 5.3����
Compliance
requirements���
������� 5.4����
Relationship
with other V.15x Recommendations����
�6����
Text
telephone-over-IP functions�
�7����
Connection
and network scenarios�����������
������� 7.1����
Service
and performance requirements for ToIP�����
������� 7.2����
Audio
and text functionality
�8����
Transport
methods�����������
������� 8.1���� Audio mode����������
������� 8.2���� VBD mode
������� 8.3���� Text relay mode�����
������� 8.4����
Switching
between transport modes�����������
�9����
ToIP
operational modes���
10���� Text Relay PHY layer operation��
11���� IP transport for text relay
��� ���11.1����
Single
and dual port operation of text relay
������ 11.2����
Text
relay throughput��������
12���� Support of DTMF in ToIP����������
13���� Transition out of text relay�����������
14���� T.140 encoding of text relay��������
������ 14.1����
Character
set support�������
������ 14.2��
��TIA-825A and T.50 encoding
requirements����������
15���� Gateway-to-gateway protocol definitions and procedures
������ 15.1����
Gateway
capability and call set-up messages���������
������ 15.2����
Gateway
call discrimination messages��������
16���� Start-up mode of operation���������
������ 16.1����
Inter-relationship
with V.150.1������
������ 16.2����
Inter-relation
with V.152���
17���� Voiceband data modem interworking requirements����������
18���� Facsimile interworking requirements��������
19���� Call set-up procedures����
20���� Call discrimination procedures�����
������ 20.1����
V.8 bis
processing
������ 20.2����
V.8
CI/XCI processing�����
������ 20.3����
Call
discrimination overview����������
������ 20.4����
Call
discrimination SDL diagrams��
������ 20.5����
Visual
flow control
Annex A �
Procedures for the optional support of SPRT protocol����
������� A.1����
Overview��
������� A.2����
SDP
negotiation����
������� A.3����
H.245
negotiation�
Annex B �
Definition of capabilities for use within H.245-based systems����
Annex C �
SDP description of sessions supporting V.151����
Annex D �
Interworking IP text devices with V.151 gateways����
������� D.1����
Introduction����������
������� D.2����
Exchanging
capabilities and opening media streams
������� D.3����
State
transition and text handling����
Annex E �
Payload format and signaling syntax for real-time� text transported within an audio stream����
������� E.1����
Overview��
������� E.2����
Payload
format������
������� E.3����
Use
of redundancy
Appendix I
� Background to PSTN text telephony����
Appendix II
� ToIP call discrimination call flows����
������ II.1����
Scope�����
������ II.2����
Scenarios
for call discrimination flows���������
������ II.3����
Scenarios
with SSE protocol being used�����
������ II.4����
Scenarios
with payload type switching being used���
Appendix
III � The use of [IETF RFC 2198] in [ITU-T V.151]����
Appendix IV
� Text buffering and transmission����
Appendix V � Probing sequence����
Bibliography����