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Junos OS substantially supports the following standards for Frame Relay interfaces.

American National Standards Institute (ANSI), Annex D, Additional Procedures for Permanent Virtual Connections (PVCs) Using Unnumbered Information Frames to T1.617-1991, Integrated Services Digital Network (ISDN)—Signaling Specification for Frame Relay Bearer Service for Digital Subscriber Signaling System Number 1 (DSS1)
Broadband Forum standard FRF.12, Frame Relay Fragmentation Implementation Agreement
FRF.15, End-to-End Multilink Frame Relay Implementation Agreement
FRF.16.1, Multilink Frame Relay UNI/NNI Implementation Agreement
International Telecommunication Union–Telecommunication Standardization (ITU–T), Annex A, Additional procedures for Permanent Virtual Connection (PVC) status management (using Unnumbered Information frames) to Recommendation Q.933, ISDN Digital Subscriber Signalling System No. 1 (DSS1) - Signalling specifications for frame mode switched and permanent virtual connection control and status monitoring
RFC 1973, PPP in Frame Relay
RFC 2390, Inverse Address Resolution Protocol
RFC 2427, Multiprotocol Interconnect over Frame Relay (obsoletes RFC 1490)
RFC 2590, Transmission of IPv6 Packets over Frame Relay Networks Specification
Internet draft draft-martini-frame-encap-mpls-01.txt, Frame Relay Encapsulation over Pseudo-Wires (expires December 2002)
Translation of the command/response bit and sequence numbers and padding are not supported.