Glossary
GL-22
Cisco ONS 15454 SDH Troubleshooting and Maintenance Guide, R3.3
May 2002
TL1
Transaction Language 1.
TLS
(Transparent LAN Service). Provides private network service across a SONET backbone.
TMN
Telecommunications Management Network.
Transponder
Optional devices of a DWDM system providing the conversion of one optical wavelength to a precision narrow band
wavelength. See also DWDM.
Trap
Message sent by an SNMP agent to an NMS (CTM), console, or terminal to indicate the occurrence of a significant event, such
as an exceeded threshold. See also CTM.
Tributary
The lower-rate signal directed into a multiplexer for combination (multiplexing) with other low rate signals to form an
aggregate higher rate level.
Trunk
Network traffic travels across this physical and logical connection between two switches. A backbone is composed of a number
of trunks. See also Backbone.
TSA
Time-Slot Assignment.
TSI
Time-Slot Interchange.
Tunneling
Architecture that is designed to provide the services necessary to implement any standard point-to-point encapsulation scheme.
Tx
Transmit.
U
UAS
Unavailable Seconds.
UDP/IP
User Datagram Protocol/Internet Protocol.
Comments to this Manuals