CONTENTS

1 Introduction
2 Scope
3 References
4 Definitions
5 Abbreviations
6 Reference configurations
6.1 Scenario 1: Routing between PFRDNs
6.2 Scenario 2: Interworking with ATM networks
7 Basic principles in routing frame relay traffic
8 Implications of service defined network connections for FR routing
9 Overview of the routing process
9.1 General
9.2 DTE-DCE interface
9.3 Originating local switch
9.4 Transit networks and switches (national and international)
10 Structure/topology of the international frame relay network
10.1 National network parts
10.2 International Network parts
11 Network numbering and identification and the relation to routing
11.1 Networks numbered under X.121
11.2 Networks numbered under E.164
11.3 Number plan interworking
11.4 Identification of transit networks
Annex A International Routing plan for PFRDNs Examples of typical FR routes
A.1 Introduction
A.2 Examples of typical routes
A.2.1 Direct route (high usage route)
A.2.2 Routes via intermediate transit networks
A.2.3 Use of Alternative routes
A.2.4 Routing plan in cases where direct routes are provisioned
A.2.5 Routing plan in cases where direct routes are not provisioned
A.3 Rerouting due to call set-up failure
Annex B Frame relay routing in the case of interworking with ATM networks
B.1 Introduction
B.2 Bilateral agreements/interworking units
B.3 Number-plan Interworking
B.4 Use of transit networks/location of interworking units
B.5 Signalling procedures
B.6 Interworking scenarios
B.6.1 Network interworking
B.6.2 Network Interworking between two PFRDNs using an ATM Network as a transit
B.6.3 Service interworking
Annex C Analysis of information required for routing
C.1 Calling party number
C.2 Incoming route DLCI
C.3 Called party number
C.4 Bearer capability: Link Layer core parameters
C.5 Priority and service class parameters
C.6 Maximum end-to-end transit delay
C.7 Transit network selection
C.8 Network management conditions
C.9 Time, event and state conditions