4.1 What could happen to an ATM connection?

With respect to resource allocation problems the following problem areas can be identified for an ATM connection:

1. If the connection is established with signaling, the call setup request could be blocked.

2. The allocated bandwidth for a connection could not be accurate and cells get discarded by traffic policing.

3. After their establishment, connections can lose cells on congested links in the network.

We now analyze each of the three areas to recognize what helps to prevent the occurrence of these troubles.