Cisco Systems 8600 Series manual Cables, Cable redundancy, Yellow alarm

XON/XOFF

A simple communications protocol for controlling the flow of data from one device to another. An XON sent from a receiving device indicates it is ready to accept data and the transmitting device may begin to output data. An XOFF from the receiving device indicates that it can no longer store any more data and the transmitting device should temporarily cease transmitting.

Y

Y-cable(s)

A short adapter cable forming an electrical branch (thus the term Y) for connecting a single customer data or trunk connection to two identical back cards to provide hardware redundancy on the IGX switch.

Y-cable redundancy

A redundancy type used in the IPX switch when a 1:1 card redundancy is implemented using a split or Y-cable for the data connection between the user device and the primary and standby IGX interface card.

Y1

A digital trunk conforming to the Japanese “Y” circuit standard, for use as a packet line. Similar to T1, it operates at 1.544 Mbps.

yellow alarm

Another name for remote alarm as the remote alarm lamp on digital transmission equipment is always yellow in color.

E-20Cisco BPX 8600 Series Reference