Cisco 7246 - uBR Router Hardware Installation Manual page 227

SEquential Coulour Avec Memoire.
SECAM
Safety extra-low voltage.
SELV
Simple Gateway Control Protocol.
SGCP
Single in-line memory module.
SIMM
Single-mode fiber. Fiber-optic cabling with a narrow core that allows light to enter only at a single
SMF
angle. Such cabling has higher bandwidth than multimode fiber, but requires a light source with a
narrow spectral width (for example, a laser). Also called monomode fiber.
Synchronous Optical Network. High-speed synchronous network specification developed by Bellcore
SONET
and designed to run on optical fiber. STS-1 is the basic building block of SONET. It was approved as
an international standard in 1988.
Short reach. SONET/SDH specification for transmit power and receive sensitivity that achieves a
SR
1.2-mile (2 km) reach.
Static Random-Access Memory.
SRAM
Spatial reuse protocol.
SRP
Set-top box.
STB
T
Digital WAN carrier facility. T1 transmits DS1-formatted data at 1.544 Mbps through the telephone
T1
switching network.
Digital WAN carrier facility. T3 transmits DS3-formatted data at 44.736 Mbps through the telephone
T3
switching network.
Technical Assistance Center.
TAC
Time of day.
ToD
Trivial File Transfer Protocol.
TFTP
Telephone-network voltage.
TNV
U
Universal broadband router.
UBR
Unshielded twisted-pair.
UTP
OL-5421-03
Cisco uBR7200 Series Universal Broadband Router Hardware Installation Guide
Glossary
GL-7