Avaya Configuring ATM and MPLS Services Instrukcja Użytkownika Pobierz pdf (Strona 150)

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101

Configuring ATM and MPLS Services

5-2

117374-C Rev 00

Defining Signaling

ATM signaling allows the router to dynamically establish, maintain, and clear a

switched virtual connection at the UNI. Using a series of messages, as defined by

the Q.2931 standard for signaling protocol (Figure 5-1

), the router:

1. Assesses the availability of an ATM end point (device)

2. Establishes a connection with that device

3. Maintains that connection for the duration of the data transfer

4. Clears the connection when the transfer is complete

Figure 5-1. SVC/PVC Signaling Protocol Stack

Bay Networks ATM routers support ATM signaling functions as defined in the

ATM Forum ATM User-Network Interface specification (Versions 3.0 and 3.1).

Q.2931

Q.SAAL

Protocol

Data

encapsulation

ATM adaptation layer

(AAL5)

ATM layer

Physical layer

ATM0039A

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