IMS and ETSI References

For more information about IMS and TISPAN, consult the following specifications:

Abbreviations

Table 9 identifies abbreviations used in the IMS and ETSI-TISPAN environments.

Table 9: Abbreviations in the IMS and ETSI-TISPAN Environments

Abbreviation

Description

3GPP

Third-Generation Partnership Project, which developed the IMS specifications.

A-RACF

Access-resource and admission control function. Provides admission control and network policy assembly.

AVP

Attribute value pair

BGF

Border gateway function

ETSI

European Telecommunications Standards Institute

FMC

Fixed mobile convergence

IMS

IP multimedia subsystem

NGN

Next-generation network

RACS

Resource and admission control subsystem. Consists of the A-RACF and the SPDF.

RCEF

Resource control enforcement function

SPDF

Service policy decision function. The SPDF coordinates the resource reservations requests that it receives from the application function.

TISPAN

Telecommunications and Internet Converged Services and Protocols for Advanced Networks

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