1 Scope
1.1 Problem statement
1.2 Example network
applications
2 References
3 Definitions
3.1 Terms defined
elsewhere
3.2 Terms defined in this
Recommendation
4 Abbreviations
5 Conventions
5.1 Conventions concerning
the ITU-T H.248 gateway control protocol
5.2 Conventions concerning
the TCP bearer protocol
5.3 Conventions concerning
the SIP Call control protocol
6 NAT-traversal for peer-to-peer
services
6.1 Overview
6.2 Protocol dependencies
7 Example use cases
7.1 TCP bearer path with
SIP signalling path
8 NAT-traversal peer-to-peer
package
8.1 Properties
8.2 Events
8.3 Signals
8.4 Statistics
8.5 Error codes
8.6 Procedures
9 TCP hole punching package
9.1 Properties
9.2 Events
9.3 Signals
9.4 Statistics
9.5 Error codes
9.6 Procedures
10 TCP traffic volume metrics
package
10.1 Properties
10.2 Events
10.3 Signals
10.4 Statistics
10.5 Error codes
10.6 Procedures
11 TCP connection control metrics
package
11.1 Properties
11.2 Events
11.3 Signals
11.4 Statistics
11.5 Error codes
11.6 Procedures
12 TCP connection quality metrics
package
12.1 Properties
12.2 Events
12.3 Signals
12.4 Statistics
12.5 Error codes
12.6 Procedures
13 Package-independent procedures
for NAT-T with TCP bearers
13.1 TCP mode of operation:
decision baseline in MGC
13.2 TCP mode of operation:
control principle at ITU-T H.248 interface
13.3 Supported connection
model
13.4 Indication of IP
transport protocol 'TCP'
13.5 Indication of 'TCP
mode' for ITU-T H.248 MG
13.6 TCP connection reuse
13.7 TCP connection
establishment phase – Handling of TCP Protocol Control Information by the ITU-T
H.248 MG
13.8 Unsuccessful NAT-T scenarios
13.9 Impact of transport
protocol encryption
13.10 Interactions with
NAT-T method latching/relatching
13.11 Possible interactions
with enabled filters for TCP traffic
14 Package-independent,
bearer-independent procedures for NAT-T
14.1 Relations to
latching/relatching based NAT traversal support
14.2 Interaction with L4
filters
Appendix I – Example signalling scenarios
I.1 Example
signalling for use case "TCP bearer path with SIP signalling path"
Page
Appendix II – TCP Functions versus ITU-T H.248 TCP modes of operation
II.1 Purpose and scope
II.2 Overview
II.3 Tables of TCP
functions versus ITU-T H.248 TCP modes of operation
II.4 Relation between TCP
proxy and TCP merge mode
Appendix III – TCP mode control – SDP "a=setup"
clarification due to b‑IETF RFC 6135
Appendix IV – Generic NAT traversal models
IV.1 ITU-T H.248 gateways
in SIP environments and remote NAT devices
IV.2 Basic types of remote
NAT devices
IV.3 Local NAT function by
ITU-T H.248 MG and end-to-end consideration
Appendix V – Illustration of performance measurements
V.1 Statistic "TCP
connection establishment delay (in TCP merge mode)"
V.2 Statistic "TCP
round-trip time during connection establishment phase"
Bibliography