Digital Link DL3800 DS1, Руководство пользователя

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Glossary G-17
G
SNMP (Simple Network Management Protocol)
A widely-used network monitoring and control protocol. Data is passed from
SNMP agents (hardware and/or software processes reporting activity in each
network device, hub, router, bridge, etc.) to the workstation console used to
oversee the network. The agents return information contained in a MIB
(Management Information Base), which is a structure that deÞnes what is
obtainable from the device and what can be controlled.
stop bit
The last transmitted element in each character, which permits the receiver to
come to an idle condition before accepting another character.
subnet mask
The number of bits in an IP address used for the subnet address.
synchronous transmission
Data communications in which characters or bits are sent at a Þxed rate and the
transmitting and receiving devices are synchronized.
T
T1
A digital carrier facility used to transmit a DS-1 formatted digital signal at
1.544 Mbps. T-1 normally can handle 24 voice conversations, each one digitized
at 64kbps. But, with more advanced digital voice encoding techniques, it can
handle more voice channels. T-1 is a standard for digital transmission in North
America. T-1 lines are used for connecting networks across remote distances.
T3
A digital carrier facility used to transmit a DS-3 formatted digital signal at
44.736 Mbps.
T-Carrier
A time-division, multiplexed digital transmission facility, usually operating at
an aggregate data rate of 1.544 Mbps.
telnet
A remote terminal application that enables the user to log on to a remote
computer on the same IP network. The user can work from the PC as if it were
a terminal attached by a hard-wired line to the remote computer. The
application uses the
Telnet Internet protocol.
transmitter
In 64K mode, the transmitter inserts the frame bit, with a Þxed pattern of
101100.