BinTec X4000, Руководство пользователя

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474 X4000 User’s Guide
Glossary
Encryption Refers to the encoding of data, e.g.
➤➤
MPPE .
Ethernet A local network that connects all devices in the network (PC, printers, etc.) via
a twisted pair or coaxial cable.
Extension An extension is an internal number for a terminal or subsystem. In
➤➤
point-
to-point ISDN accesses , the extension is usually a number from the
➤➤
extension numbers range assigned by the telephone provider. In point-
to-multipoint connections, it can be the MSN or a part of the MSN.
Extension numbers
range
(direct dialing range)
A point-to-point ISDN access includes a
➤➤
PABX number and an
extension numbers range. The PABX number is used to reach the PABX. The
extension numbers range is a group of numbers used for selecting terminals
within the
➤➤
PABX .
Filters A rule that defines a set of packets that should or should not be transmitted by
the router.
Firewall Designates the whole range of mechanisms to protect the local network against
external access. X4000 provides protection mechanisms such as
➤➤
NAT ,
➤➤
CLID ,
➤➤
PAP/CHAP , access lists, etc.
FTP File Transfer Protocol
A TCP/IP protocol used to transfer files between different hosts.
Gateway Entrance and exit, transition point
Component in the local network that offers access to other networks, also offers
transitions between different networks, e.g.
➤➤
LAN and
➤➤
WAN .
HDSL High Data Rate
➤➤
DSL
The
➤➤
upstream and
➤➤
downstream data rates are:
➤➤
T1 1.554
Mbps and
➤➤
E1 2.048 Mbps over ranges up to 4 km.
The main HDSL applications are: High-speed data communication over leased
lines.
HDSL2 High Data Rate
➤➤
DSL , version 2
The
➤➤
upstream and
➤➤
downstream data rate is 1.554 Mbps over
ranges up to 4 km.