Enterasys Networks CSX7000 Manuel d'utilisateur Page 39

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Central Site Remote Access Switch 39
T
HE
C
YBER
SWITCH
Remote ISDN Devices
More detailed descriptions of system software and hardware are included in the next two chapters.
The following section describes remote ISDN devices.
REMOTE ISDN DEVICES
The CyberSWITCH provides a centralized concentrator function for remote ISDN devices. The
devices can be separated into the following categories:
remote ISDN bridge devices
PC based terminal adapters
ISDN enabled workstations
other ISDN routers
Typical remote ISDN bridges provide one Ethernet port and one basic rate ISDN port. The basic
rate port is connected to the switched digital network and is used to make connections to the
CyberSWITCH. The Ethernet port is used to connect to a remote LAN. The remote bridge device
sends Ethernet frames from devices on the remote LAN over the switched network.
PC-based terminal adapters connect to a remote personal computer and use the switched digital
network to connect to the system. The terminal adapter sends network protocol specific frames
from the host PC device over the switched network.
Workstation-based terminal adapters connect to a workstation and use the switched digital
network to connect to the system. The terminal adapter sends network protocol specific frames
from the workstation over the switched network.
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