Carrier Access Network Device Axxius 800, Руководство пользователя

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Axxius 800 - Release 2.2 Glossary - 9
Glossary
frame
frame
A fragment of data that is packaged into a frame format, which comprises
a header, payload, and trailer.
frame relay
A packet-switching protocol for connecting devices on a Wide Area
Network (WAN). Frame Relay networks in the U.S. support data transfer
rates at T1 (1.544 Mbps) and T3 (45 Mbps) speeds. Most telephone
companies now provide Frame Relay service for customers who want
connections at 56 Kbps to T1 speeds. However, it is being replaced in
some areas by faster technologies, such as ATM.
FX
Foreign Exchange. A Central Office trunk which has access to a distant
central office. Dial Tone is returned from that distant Central Office, and
a location can be reached in the area of the foreign Central Office by
dialing a local number. This will provide easier access for customers in
that area and calls may be made anywhere in the foreign exchange area
for a flat rate.
FXO
Foreign Exchange Office. Foreign exchange (FX) service is a service
that can be ordered from the telephone company that provides local
telephone service from a central office which is outside (foreign to) the
subscriber’s exchange area. Simply, a user can pick up the phone in one
city and receive a dial tone in the foreign city. This kind of connection is
provided by a type of trunk called foreign exchange (FX) trunk. FX trunk
signaling can be provided over analog or T1 links. Connecting POTS
telephones to a computer telephony system via T1 links requires a
channel bank configured with FX type connections.
FXS
Foreign Exchange Station.
gateway
A link from one computer system to a different computer system.
ground
A physical connection to the earth or other reference point.
ground start
(GS)
A method of signaling from a terminal or subscriber loop to a switch, in
which method one side of a cable pair is temporarily grounded