Avaya Configuring ATM Services Bedienungsanleitung Seite 90

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Configuring ATM Services
5-6
Signaling ATM Adaptation Layer (SAAL)
As defined by the ATM Forum ATM User-Network Interface Specification
(Version 3.0), the SAAL resides between the ATM layer and the Q.2931 signaling
layer. SAAL reliably transports signaling messages between peer Q.2931 entities
over the ATM layer (refer to Figure 5-2).
ATM Error Checking
ATM verifies that the VPI/VCI is valid with respect to the PVCs configured for the
ATM circuit. It also verifies the header format. ATM verifies valid SVC
connection through signaling messages.
Simulated Multicast Packet Support
Simulated multicasting is generally used in certain address resolution techniques
and for applications that require the delivery of identical information to multiple
recipients. Bay Networks ATM routers simulate multicasting by sending a copy of
the multicast or broadcast packet to every available virtual circuit on a particular
logical interface.
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