The Frame Relay Control Protocol portable software product provides the status signaling for PVCs (LMI) and/or signaling to establish, maintain and release SVCs (Q.933 / X36 / FRF4 / X76 / FRF10). The software supports the User-Network Interface (UNI) and/or Network-Network Interface (NNI). The Frame Relay Control Protocol software product supports the ITU-T, ANSI and Frame Relay Forum variants of the protocol. The software has the following components:

  • Signaling Protocol. It supports UNI signaling – Q.933 Case A, Q.933 Case B, FRF4, X36 and NNI signaling – X76 and FRF10. The signaling protocol also provides capabilities to establish, maintain and terminate Switched Virtual Connections (SVCs) and to detect and recover from errors. The SVCs are established by exchanging signaling messages with a frame handler within the network over any Bearer channel (B-channel).
  • Local Management Interface (LMI) protocol. It provides capabilities to manage and maintain Permanent Virtual Connections (PVCs), verify link integrity and detect and recover from errors.

Trillium Q.933 / LMI software enables telecom equipment manufacturers of soft switches, signaling gateways, signal transfer points, service control points, media gateway controllers or other products to:

  • Accelerate time to market
  • Reduce development costs
  • Reduce project risk of internally developed Q.933 / LMI applications

Product deliverables consist of C source software, documentation, training, a warranty and technical support.

FEATURES + BENEFITS

SVC SIGNALING

  • Supports Q.933 Case A of the signaling procedure. In this case, the channel over which the Frame Relay connections are established is assumed to be pre-established (for example, using ISDN signaling). The Frame Relay signaling functionality is used only to set up the Frame Relay connections using in-band signaling.
  • Supports Q.933 Case B of the signaling procedure. In this case, the set up of the Frame Relay connection involves a specification of both the B-channel over which the connection is carried and the logical Frame Relay connection ID. The signaling for all Frame Relay connections is carried out-of-band on a configurable DLCI.
  • Supports the FRF.4 procedure. FRF.4 is the Frame Relay Forum UNI SVC Implementation Agreement. In this case, the equipment is attached to a non-ISDN Frame Relay network or to an ISDN network as specified in Q.933 Case A of the signaling procedure.
  • Supports X.36 procedure. X.36 is the ITU-T specification for Frame Relay SVC support at the DTE/DCE interface of a public data network providing Frame Relay service.
  • Supports ITU-T X.76 NNI and Frame Relay Forum’s FRF.10 NNI specifications. These variants specify procedures for Frame Relay SVC establishment across multiple networks. These specifications also support Switched PVCs (SPVCs) so that PVCs at the UNI can be mapped to SVCs within the network. The benefits of these variants are realized in the ease of administration of Frame Relay connections and re-routing when failures occur within the network.
  • Supports point-to-point connections.
  • Supports negotiation of Data Link Connection IDs (DLCIs).
  • Supports configurable DLCI for signaling.
  • Supports B-channel allocation.
  • Supports transparent specification of link layer protocol parameters, link layer core parameters, upper layer compatibility, lower layer compatibility and quality of service parameters.

LMI

  • Supports procedures to maintain link integrity and manage end-to-end PVC establishment, end-to-end PVC deletion and end-to-end propagation of link and PVC failures.
  • Supports configurable unidirectional and bidirectional procedures at the UNI.
  • Supports bidirectional procedures at the NNI.
  • Supports the generation of asynchronous PVC status messages.
  • Supports auto detection of remote LMI protocol.
  • Supports multiple variants (such as Q.933 Annex A, ANSI Annex D, Q.933 Annex A – Bidirectional, ANSI Annex A – Bidirectional, and Gang of Four). Each link can be configured to support a variant independent of any other link, that is, one link can support Q.933 Annex A while another link simultaneously supports ANSI Annex D.

COMMON CAPABILITIES:

  • Supports the user and/or network side of the User-Network Interface (UNI).
  • Supports Network-Network Interface (NNI).
  • Conforms to Trillium Advanced Portability Architecture (TAPA)
  • Benefits of licensing Trillium software from Continuous Computing

PRODUCT INTERWORKING

Trillium Q.933 / LMI Frame Relay Control Protocol can be used with Trillium Q.930/Q.931, Frame Relay Data Link (Q.922), Frame Relay-ATM Interworking and MOS software products.

CONFORMANCE

Trillium Q.933 / LMI Frame Relay Control Protocol software conforms to the following standards:

  • ITU-T, Q.933, Digital Subscriber signaling System Number 1 signaling Specification for Frame Mode Basic Call Control Recommendation
  • Frame Relay Forum, FRF.4 – Frame Relay DTE-DCE SVC Implementation Agreement
  • ITU-T, X.36, Interface Between a DTE and a DCE for Public Data Networks Providing Frame Relay Data Transmission Service Recommendation
  • ANSI, T1.617 ISDN – signaling Specification for Digital Subscriber signaling System Number 1 (DSS1)
  • Frame Relay Forum, FRF.10 – Frame Relay Network-Network SVC Implementation Agreement
  • ITU-T, X.76, Network-Network Interface between Public Data Networks providing the Frame Relay Data Transmission Service
  • Frame Relay Specification with Extensions Based on T1S1 Standards, Document Number 001-208966, Revision 1.0, Gang of Four, September 1990