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AT-S7/AT-S9 Operations Manual
5
Permanent Virtual
Circuits
If connections are established manually through either network management
or remote communications, the channels are called Permanent Virtual
Circuits (PVCs). PVCs are implemented through either a management
program termed Omega or a remote management station. With this release,
each switch must have a PVC connection between itself and every other
switch.
Analogous to a leased or dedicated real circuits found in packet-based
networks, PVCs must be physically configured by a network administrator
from the ATM switch to both establish and maintain ATM connectivity.
LAN Emulation
An Emulated LAN (ELAN) allows you to configure a network through
software instead of rearranging physical cables.
ELANs are created and managed using Omega software management
screens.
Figure 5 shows a typical ATM network topology.
Figure 5: ATM Topology
Ethernet Switch with ATM Access
PCMCIA RS-232 POWER SUPPLY
ALARMS
NETWORK LOAD
ATM PORT
Ethernet Switch with ATM Access
PCMCIA RS-232 POWER SUPPLY
ALARMS
NETWORK LOAD
ATM PORT
Ethernet Switch with ATM Access
PCMCIA RS-232 POWER SUPPLY
ALARMS
NETWORK LOAD
ATM PORT
Ethernet Switch with ATM Access
PCMCIA RS-232 POWER SUPPLYALARMS NETWORK LOADATM PORT
Ethernet Switch with ATM Access
PCMCIA RS-232 POWER SUPPLY
ALARMS
NETWORK LOAD
ATM PORT
ATM
Switch
ATM inter-switch connection
Single physical link with
multiple PVCs
Server
Station 1
Station 2
“A”
“B”
“C”
“D”
“E”
ATM
Switch
ATM
Switch
ATM
Switch
ATM
Switch
ATM
Cloud
Server
17


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