Aricent FR-ATM PVC Interworking (Frame Relay-Asynchronous Transfer Mode) software supports network and service interworking of FR and ATM PVCs in accordance with FRF.5 and FRF.8. The network interworking part of Aricent FR-ATM PVC transparently transports FR traffic over the ATM network, while the service interworking part allows FR devices to interwork with the ATM services.

Aricent FR-ATM PVC is integrated with Aricent FR-PVC, which supports the Q.933 core, PVC management procedures and switching functionality. The FR-SSCS functionality of the network interworking part of Aricent FR-ATM uses the Q.933 core and PVC management procedures provided by Aricent FR-PVC.

The Aricent FR-ATM PVC software requires hardware and software implementation of AAL5.

• Network Internetworking Functions:
• Complies with FRF.5 and ITU-T I.365.1 specifications.
• Supports one-to-one and many-to-one multiplexing of FR DLCIs to an ATM VCC.
• Supports ITU-T Q.933 Annex A procedures.
• Service Internetworking Functions:
• Complies with FRF.8, RFC 1483 and RFC 1490 specifications.
• Provides one-to-one mapping between a FR DLCI and an ATM VCC.
• Supports transparent and translation modes, for encapsulation of upper layer user protocols.
• Conveys PVC management information between FR and ATM.
• Network and Service Internetworking Functions:
• Supports mapping between the ‘DE’ field of the FR frames and the ‘CLP’ field of the CPCS AAL5 frames.
• Supports mapping between the ‘FECN’ and ‘BECN’ fields of the FR frames and the ‘EFCI’ field of the CPCS AAL5 frames.
• Flexible and easy-to-adapt interface with the CPCS AAL5 subsystem.
• Provides Congestion Management procedures as per ITU-T I.370.
• Provides complete support for SNMP-based management by implementing a proprietary FR-ATM PVC Internetworking MIB.

Aricent FR-ATM PVC reduces the time to market for OEMs and VARs who wish to incorporate the FR-ATM PVC internetworking functionality into their devices.

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