Question 2/XVIII - Asynchronous Transfer Mode (ATM)

Considering

(a) that Recommendation I.121 recognizes that ATM is the target transfer
mode solution for implementing broadband capabilities within an ISDN;

(b) that in future ATM could be also applicable to 64 kbit/s based ISDN;

(c) that there is a need to give guidance to other Study Groups of the
impact of the ATM technique on network components;

the following should be studied:

1. What are the fields of application for ATM techniques?

2. What basic characteristics and parameters should be defined for the
ATM?

3. What is the impact of introducing ATM techniques into the network
e.g., on signalling, switching, transmission, multiplexing and cross-
connect functions and capabilities, and on UNI and NNI?

4. What network concepts and standardization aspects are needed in ISDN
during the evolutionary period from 64 kbit/s based networks to networks
with broadband capabilities?

5. What is the relationship between Asynchronous Transfer Mode based
network capabilities supporting existing and new services and network
management functionality and architectural modelling during the
evolution of ISDN?

Note - The study should be conducted in close relation with Question
13/XVIII.