61200217L1-1 T3SU 300 User Manual D-1
Appendix D Glossary
10baseT
Ethernet connector which implements the IEEE standard on 24-gauge,
unshielded twisted pair wiring.
AIS
alarm indication signal. An unframed all ones pattern that replaces the normal
traffic signal when a failure has been detected. This signal prevents logical con-
nections from terminating between devices.
AMI
alternate mark inversion. A bipolar line-coding format in T1 transmission sys-
tems whereby successive ones are alternately inverted.
ANSI
American National Standards Institute. A non-profit organization that coordi-
nates voluntary standards activities in the United States.
asynchronous
A method of data transmission which allows characters to be sent at irregular
intervals by preceding each character with a start bit, followed by a stop bit.
bandwidth
The bandwidth determines the rate at which information can be sent through a
channel (the greater the bandwidth, the more information that can be sent in a
given amount of time).
