Centillion 1200N ATM Switch User Manual 5-1
NTP 297-8103-903Software Specifications
This section briefly describes the functions of the ATM Switch.
As a core entity in an ATM network, the ATM Switch provides a variety of
functions to sustain and operate the network most efficiently and at high quality.
Here, the following functions of the ATM Switch are explained.
The ATM Switch supports both fixed con nections (PVCs) and v ariable connections
PVC is a fixed connection that is manually established on the ATM Switch.
Normally, the connection is established according to the connection information
stored in the PCMCIA ATA card. The connection establishment can be changed by
changing the connection information from an external MAT. When the ATM
Switch is reset, the connection is established according to the PVC connection
information stored in the PCMCIA ATA card or PVC connection information
downloaded from an external source.
SVC is a variable connection that is prepared by a protocol called signaling that
establishes and releases SVCs. The A TM Switch ma intains a n etwork addres s - line
correspondence table to realize the best suited SVC routing for the given network
condition. This table is generated and changed manually (static routing table), or
automatically generated by the ILMI function and the PNNI function (dynamic
Both types of connection can be set to either point-to-point connection or point-to-