Cisco Transport Node Controller - Control processor - SONET/SDH, PTP - refurbished - plug-in module
All controller card versions incorporate a highly stable Stratum 3 internal timing reference to provide system timing based on input received from an external BITS source. Synchronous status messaging helps the system select the best timing sources, and a holdover mode maintains timing accuracy when preprovisioned synchronization references are not available. Nonvolatile database storage for communication, provisioning, and system control is provided, allowing full database recovery and survivability with complete system power loss. In addition, short-term clock recovery is also supported, reducing the need to reset the calendar and ToD settings after a brownout or complete power outage. A memory module is built into each ONS 15454 MSTP and NCS 2000 Series chassis and synchronized with the memory of the cards, thereby providing a backup to the node IP address, software package, and circuit database. This synchronization provides faster time to recovery when the node is used in simplex mode during a control-card replacement. The cards have two built-in interface ports for accessing the system: an RJ-45 connector and an RS-232. The RJ-45 port provides 10BASE-T Ethernet connectivity to the system, providing local and remote access to the craft-management system, Cisco Transport Controller, through a common web interface.
