CONTENTS

 1     Scope
 2     References
        2.1     Normative references
        2.2     Informative references
 3     Definitions
 4     Abbreviations
 5     Architecture
        5.1     Voice Services over MPLS logical service reference model
        5.2     Voice services over MPLS Reference Architecture
 6     Requirements for Voice Services over MPLS
        6.1     General service requirements
        6.2     User plane requirements
        6.3     User plane requirements for combined audio and video service
        6.4     Control plane requirements
        6.5     Management plane requirements
 7     Voice Services over MPLS interworking requirements
        7.1     Voice Services over MPLS Interworking requirements with Voice over IP
        7.2     Voice Services over MPLS interworking requirements with Voice over ATM
        7.3     Voice Services over MPLS interworking requirements with Voice over Frame Relay
        7.4     Voice Services over MPLS interworking requirements with PSTN/ISDN
        7.5     Voice Services over MPLS Interworking requirements with mobile access networks
Appendix I – Voice over Packet Protocol architectures
        I.1        Voice over Frame Relay
                  I.1.1     FR reference model and service description
                  I.1.2     Multiplexing
                  I.1.3     Voice over Frame Relay user plane protocol stack
        I.2        Voice over ATM as described in AAL type 2 Service Specific Convergence Sublayer for trunking [9]
                  I.2.1     User plane protocol stack for Voice over ATM as described in AAL type 2 Service‑Specific Convergence Sublayer for trunking[9]
        I.3        Voice over IP
Appendix II – Alternate solutions for Voice Services over MPLS
       II.1     Voice over ATM
       II.2     Voice over IP
       II.3     I.366.2 Voice Trunking format over MPLS
       II.4     Voice over MPLS
       II.5     Summary of different solutions for Voice Services over MPLS
Appendix III – BICC architecture
Appendix IV – Examples of Voice Services over MPLS deployment scenarios