RFC 2871 (rfc2871) - Page 2 of 25
A Framework for Telephony Routing over IP
Alternative Format: Original Text Document
RFC 2871 TRIP Framework June 2000
9.1 Gateways and Location Servers ....................... 16
9.2 Location Server to Location Server .................. 16
9.2.1 Nature of Exchanged Information ..................... 17
9.2.2 Quality of Service .................................. 18
9.2.3 Cost Information .................................... 19
10 The Front End ....................................... 19
10.1 Front End Customers ................................. 19
10.2 Front End Protocols ................................. 20
11 Number Translations ................................. 21
12 Security Considerations ............................. 22
13 Acknowledgments ..................................... 23
14 Bibliography ........................................ 23
15 Authors' Addresses .................................. 24
16 Full Copyright Statement ............................ 25
1 Introduction
This document serves as a framework for Telephony Routing over IP
(TRIP), which supports the discovery and exchange of IP telephony
gateway routing tables between providers. The document defines the
problem of telephony routing exchange, and motivates the need for the
protocol. It presents an architectural framework for TRIP, defines
terminology, specifies the various protocol elements and their
functions, overviews the services provided by the protocol, and
discusses how it fits into the broader context of Internet telephony.
2 Terminology
We define the following terms. Note that there are other definitions
for these terms, outside of the context of gateway location. Our
definitions aren't general, but refer to the specific meaning here:
Gateway: A device with some sort of circuit switched network
connectivity and IP connectivity, capable of initiating and
terminating IP telephony signaling protocols, and capable of
initiating and terminating telephone network signaling
protocols.
End User: The end user is usually (but not necessarily) a human
being, and is the party who is the ultimate initiator or
recipient of calls.
Calling Device: The calling device is a physical entity which has
IP connectivity. It is under the direction of an end user who
wishes to place a call. The end user may or may not be directly
controlling the calling device. If the calling device is a PC,
Rosenberg & Schulzrinne Informational