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CS19208CBI Arkusz danych(PDF) 2 Page - Applied Micro Circuits Corporation |
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CS19208CBI Arkusz danych(HTML) 2 Page - Applied Micro Circuits Corporation |
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2 / 4 page  Confidential and Proprietary 2 Empowering Intelligent Optical Networks Product Brief Niagara OC-192/48/12/3 DW/FEC/PM and ASYNC Mapper Device Part Number S19208CBI, Revision 1.4, Jan 2003 Applications • SONET/SDH OC-48/STM-16 OC-192/STM-64 DWDM transport systems and DWDM metro networks • Transparent Add-Drop Multiplexing Transponder applications • Protocol Transparent Transport • IaDI to IrDI FEC transponder chip (6.2dB gain network to >8dB gain network) GENERAL DESCRIPTION The AMCC Niagara device is a wide-area and metropolitan transport device aimed at next generation applications required transparent multiplexing and enhanced error correction capa- bility. The device utilizes the ITU G.709 frame and overhead structures to enable deployment of full OTN compliant network elements. Niagara will support two gain rates, the standard G.975 based rate of 6.2dB (raw optical coding gain), and AMCC’s proprietary EFEC code rated at greater than 8dB (raw optical coding gain). The Niagara device is capable of running both these gains simultaneously, providing a superb single chip transponder solution for standard gain to enhanced gain net- works. DATA INTERFACES Both the client and network interfaces are SFI-4 compliant. Data is transferred as 16 bit LVDS parallel data with a synchro- nous clock. For 10 Gbps applications, the client interface rate varies between 622 Mbps and 692 Mbps, for an aggregate bandwidth of 9.95 Gbps to 10.7 Gbps. The defined low end of the parallel client interface is 31.25 Mbps (across 4 bits of the interface) for an aggregate bandwidth of 125 Mbps. The device supports OC-192/STM-64, ITU G.709 OTU-2, ITU-G.709 ODU- 2, or proprietary direct map (into ODU-2) data up to a client rate of 10.3 Gbps. For 10 Gbps applications, the network side data interface operates at parallel rate of 622 Mbps and 693 Mbps for an aggregate bandwidth of 9.95 Gbps to 11.1 Gbps. The defined low end of the parallel network interface is 33.4375 Mbps (across 4 bits of the interface) for an aggregate band- width of 133 Gbps. CLIENT PERFORMANCE MONITORING A SONET/SDH performance monitor supporting OC192/48/12/ 3 and SDH64/16/4/1 rates is provided to perform optional sec- tion and limited-line termination functions. TOH for the SONET signal is dropped and added. On-chip processing of the critical TOH functions, such as B1, B2, and J0 is provided to enable functioning as a SONET/SDH network element. The perfor- mance monitor may also be configured to provide non-intrusive monitoring while transparently passing through the received signal with no overwrite. The 10 Gbps signal and the 2.5 Gbps signal may be synchronously or asynchronously mapped into the ODU-2 and ODU-1 payloads, respectively. FEC parity check bytes are then optionally added to form the OTU-2 or OTU-1. The device can also output the ODU-2 or OTU-1 with no parity check bytes. In the receive direction, data is de- mapped from the ODU-2 or OTU-1, and control signals pro- vided to enable timing regeneration of the client 10 Gbps or 2.5 Gbps signal. When operating in the ITU G.709 OTU-2/OTU-1 or ODU-2/ ODU-1 mode, the SONET monitors are bypassed. On-chip processing of the G.709 overhead is provided to enable single chip G.709 section termination. G.709 overhead can be added or dropped as required. Re-mapping required for synchroniza- tion of asynchronous ODU-1 signals is not supported. Client-signal monitoring for 8B/10B encoded data is also pro- vided, as well as 64B/66B monitoring for 10GE-LAN traffic. A full 10GE-LAN MAC is also included in the Niagara device to support extensive 10GE monitoring. AIS SUPPORT For applications in which the client signal is SONET or SDH, the Niagara can generate a SONET/SDH AIS on both the client ingress and the egress. For applications in which the client signal is G.709 compliant or for OTN regenerator applications, Line Fail and un-equipped OTN AIS is supported. For OTN edge applications, the device can be provisioned to provide either a SONET/SDH AIS or a OTN Generic AIS to the client. This facilitates convergence of the SONET/SDH and OTN functions into a single network ele- ment. ODU MAPPING ITU compliant client mapping of SONET OC-192 or SDH STM- 64 into the ODU-2 signals (and the corresponding 2.5G signals into an ODU-1) is supported whereby a stuff column is added to every G.709 sub-frame resulting in a ODU rate expansion of (239/237). The chip can be configured to insert the G.709 com- pliant stuff-byte value or to insert user data into this column. The values assigned to the stuff bytes can be defined either from a register set on chip or from an external add-drop port. Coverage of these stuff columns in the BIP calculation or in the FEC is optional and can be enabled via software. When the no- coverage option is enabled, The BIP and Parity check values are calculated as if the standard stuff values were present. A direct map mode is supported for ODU-2 and ODU-1 with no stuff columns to enable proprietary mapping with a 239/238 rate. Start of frame signals are provided at the input and output ports to enable synchronization to the ODU. |
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