28299-BRF-001-A MA-COM | Alldatasheet

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Complete APS Solution for Linear 1+1, 1:n and UPSR Automatic Protection Switching (APS) is a feature for SONETequipment that is used to improve the availability and reliability oftransport systems by switching to a standby facility when failures occur.The Mindspeed APS Controller complies with the GR-253-CORE standards identified for two varieties oflinear switching (1+1 and 1:n) as well as a ring switching topology known as SONET GR1400 Unidirectional Path Switched Rings (UPSR).This single package offers a portable solution to make imple- mentation ofLinear 1+1,1:n and (UPSR) architectures simple and quick. The APS Controller can also be distrib- uted to support card level protection. APS Controller The APS Controller is operating system (OS)- and hard- ware independent software with well-defined interfaces that allow easy integration with system software.The APS Controller consists ofan application interface for users’applications and network management,a SONET driver interface for interacting with a SONETdevice,and a bridging/switching interface for switching over the standby line. The APS software works with Mindspeed’s TAP driver software to provide a complete PHYsolution. APS State Machine At the heart ofthe APS Controller is a state machine that handles the signaling and the state transitions based on incoming APS messages.The APS message for Linear configurations consists ofthe combination ofK1 and K2 bytes ofthe SONEToverhead frame.The K1 and K2 are used to coordinate bridging and switching action with the far end. For UPSR architectures,path layer indications are detected locally by the APS controller and used to switch to the ring that exihibits the best performance. Network Management and Configuration The APS Controller’s application interface lets users employ existing network management software with the Controller to provide protection switching messages and statistic retrieval.The APS is highly configurable through the application programming interface (API). A CONEXANT BUSINESS ™#/R > 1+1 and 1:n Linear Architectures > UPSR support > Distributed processor support > GR-253 and G.783 Annex ACompliant > ANSI-C Source Code > Works with Mindspeed TAP software drivers to provide complete solution > Portability across Operating Systems and hardware platforms > KEY FEATURES Automatic Protection Switching Controller Software CX28299

The Mindspeed APS software has been designed to be portable across operating systems and hardware platforms. An OS abstraction layer is incorporated to ease integration of the APS Controller to a target hardware and operating system.The APS software is a modular design using service layers.The APS software operates above the TAP device driver software,and utilizes the services ofthe TAP driver to control the PHYaccording to the APS requirements. SONETDriver Interface Ageneral-purpose SONETdriver interface (SDI) allows the APS Controller to communicate with the TAP device driver and the underlying PHYdevice.This interface can integrate seamlessly with the required Mindspeed TAP device driver to support the CX28250 ATM OC-3 PHY,CX29704 Quad STS- 3/STM-1 ATM/POS PHY,and the M29730 Quad OC-48/Single OC-192 Packet Over SONETFramer. Bridging and Switching Interface The APS Controller has a bridging and switching interface to perform these operations.The underlying device can be either a SONETdevice or a bridging and switching device. Application Interface The APS Controller features a well-defined application programming interface (API).The API allows the APS Controller to be implemented as a module that can be accessed directly by other components. It allows easy integration with higher-level application software to shorten the development cycle. Ordering Part Numbers CX28299 APS Controller CX28250TAP Device Driver CX29704TAP Device Driver M29730TAP Device Driver Automatic Protection Switching Controller Software User PHY Device APS Device Driver PHY Device Driver Figure 1 APS Design

www.mindspeed.com/salesoffices General Information: (949) 579-3000 Headquarters –Newport Beach 4000 MacArthur Blvd.,East Tower Newport Beach,CA 92660-3007 Order# 500383A M02-0673 © 2001 Mindspeed Technologies™, a Conexant business. All rights reserved. Mindspeed and the Mindspeed logo are trademarks of Mindspeed Technologies. All other trademarks are the property of their respective owners. Although Mindspeed Technologies strives for accuracy in all its publications, this material may contain errors or omissions and is subject to change without notice. This material is provided as is and without any express or implied warranties,including merchantability,fitness for a particular purpose and non-infringement. Mindspeed Technologies shall not be liable for any special,indirect,incidental or consequential damages as a result ofits use. A CONEXANT BUSINESS ™#/R

  • APS Architectures Supported –Linear 1+1 –Linear 1:n –UPSR
  • Distributed Processing
  • Telcordia GR-253-CORE
  • G.783 Annex ACompliant
  • Flexible system design –SONETdriver interface –Bridging and switching interface –Application interface
  • Network management and configuration –Manually initiated APS switch requests –Statistic retrieval –Configure APS Controller
  • Integrate seamlessly with required TAP Device Drivers –CX28250TAP –CX29704TAP –CX29730TAP
  • Portability –ANSI-C source code –Extensible to other embedded kernel –VxWorks sample port –QNX –Solaris Product Features Add- Drop Node Pass-Through Node Drop- and- Continue Node Vtx or STS-N Vtx or STS-N Basic UPSR Operation Figure 5 Basic UPSR Architecture