Level 2 specification

NR/L2/TEL/30185

Principles for Operational Telecommunications, Signalling and E&P Sub-Access Internet Protocol Networks

Clause map — what each clause deals with

1	Purpose	Consistent rules for designing sub-access telecoms IP networks for telecoms, signalling and E&P
2	Scope	Used with 30182; applies to operational sub-access network design
3	Roles and Responsibilities	Roles — design authority and others
4	Definitions	Definitions — availability, sub-access and so on
5	Glossary	Acronyms (AAA, QoS, VLAN and so on)
6	Network Rail Telecommunications Network Landscape	The NR telecoms network landscape — core, access, sub-access
7	Telecommunications Network	Components of an end-to-end telecoms network and safety-case demarcation
8	Telecommunications Network Assets	What counts as a telecoms network asset
9	Telecommunications Sub-Access Network Assets Specifications	Approved sub-access network equipment specifications
10	Design of Telecommunications Sub-Access Networks	Who designs sub-access networks and the design expectations
11	Telecommunications Network Connectivity and Demarcation	Connectivity and demarcation between networks
12	Telecommunications Network Management and Administration	Remote management and administration of assets
13	IP Address Management of Telecommunications Networks	IP address allocation by NRT
14.1	Telecommunications Network Quality of Service	Quality of service principles
14.2	Traffic Marking Points	Traffic marking points
14.3	Traffic Mapping Points	Traffic classes and mapping