BinTec X4000, Руководство пользователя

Страница: 281 / 498

X4000 User’s Guide 281
WAN Interface Card for ISDN PRI and/or G.703
9
9.2 WAN Interface Card for ISDN PRI and/or
G.703
The PRI (Primary Rate Interface) or G.703 expansion card is equipped with two
ports, each with two sockets (IN and OUT). By installing the expansion card,
you can equip X4000 with
■
one ISDN PRI and/or one G.703 interface or
■
two ISDN PRI interfaces or
■
two G.703 interfaces
The necessary licenses for activating the desired interfaces can be obtained
from your dealer.
PRI You can connect X4000 ’s ISDN PRI interface to a Primary Rate Interface. This
is done by connecting the NT (Network Termination) adapter of your telephone
provider to the IN socket of a port activated by license. In Germany, this
provides you with 30 B-channels and 1 D-channel, which you can use for both
dialup and leased lines over ISDN.
G.703 With an X4000 G.703 interface, you can install a G.703 leased line to a
connection partner. This is also done by connecting the NT (Network
Termination) adapter of your telephone provider to the IN socket of a port
activated by license. A G.703 leased line is an unstructured high-speed line of
up to 2 Mbps for the transmission of data with HDLC framing. The connection
status is not checked at layer 1; if necessary, this must be done by higher
protocol layers such as the PPP.
The PRI or G.703 expansion card is equipped as standard with hardware
support for encryption and compression ( chapter 9.5, page 306 ) and can be
optionally equipped with up to two resource cards with digital modems
( chapter 9.4, page 295 ).
You can use a PRI interface as both a PRI and G.703 interface.
You can only use a G.703 interface as a G.703 interface.