VC Data Mappers
Volta is a 10-port, 10 Gbps, multiprotocol mapper device that enables optimized transport of Gigabit Ethernet (GbE), DVB-ASI, and storage area network (SAN) client data signals over SONET/SDH networks using virtual concatenation (VC). Its flexible architecture and built-in wide-range clock and data recovery units support any protocol at any time on any client data port, allowing the implementation of mixed-protocol line cards. Combined with SONET/SDH VC, transparent GFP mapping allows transporting any client protocol over the WAN in right-sized tributaries while preserving the native 8B/10B coding information as required for point-to-point wire services. For GbE client ports, the device additionally supports a fractional frame-based mapping mode into SONET/SDH virtual containers of any size, using HDLC, X.86 (EoS), or GFP encapsulation.
Volta's flexible, backplane interfaces support direct connection to two 4x2.488 Gbps backplanes as usually required in multiservice SONET/SDH switches. For Metro DWDM systems, Volta can alternatively be connected directly to optics or external FEC devices in either STS-192/STM-64 or 4xSTS-48/STM16 mode, offering a cost-effective, single-chip solution for data transport over SONET/SDH.