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Dynamic Synchronous Transfer Mode (DTM) Fundamentals and Network Solutions

Table of Contents:
Definition and Overview
1. Why DTM?
2. DTM Basics: Circuit Switching vs. Packet Switching
3. The DTM Advantage: Combining Synchronous and Asynchronous Media-Access Schemes
4. Principles of DTM: Frames and Slots
5. DTM Services
6. The DTM Solution for Enterprise Access
7. The DTM Solution for Residential and Small-Office Access
8. The DTM Solution for Content Providers
9. DTM Solution for Video-Production Networks
10. Application Server (AS) and Services
11. The Future of DTM
Self-Test
Glossary
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Self-Test
1. Over the last few years, the demand for network-transfer capacity has decreased at an exponential rate.
a. true
b. false
2. Of the two basic technologies used for building high-capacity networks, circuit rather than packet switching provides more support for real-time traffic.
a. true
b. false
3. The DTM solution is designed to transport common communication protocols over copper wire.
a. true
b. false
4. Although combining the DLE service with an IP routing solution is beneficial, it does not enable the complete separation of Internet from corporate-data traffic.
a. true
b. false
5. DTM can serve as a common backbone for both the GSM and the GPRS.
a. true
b. false
6. All but which of the following are characteristics of circuit-switched networks?
a. The transfer of payload data within the circuit does not contain overhead.
b. Control signaling and payload data transfers are separated.
c. Reserved resources can be used by other users if the circuit is inactive.
d. Support for real-time traffic is provided.
e. Processing of control information and control signaling is performed mainly at the circuit setup and termination.
7. All but which of the following are characteristics of packet-switched networks?
a. Real-time traffic is supported without advanced control mechanisms for buffer handling and direction.
b. Each network node contains cues.
c. Connectionless as well as connection-oriented technology may form the basis of the network.
d. Bursts of random traffic are more easily accommodated.
e. Each packet contains address, size, sequence, and error-checking information.
8. DTM is based on all but which of the following principles?
a. Link capacity is divided into frames of 125 microseconds.
b. Data is transported in channels.
c. At least three types of reservation schemes are offered.
d. Network resources may be fully controlled.
e. Fiber transmission capacity is not growing fast enough for available processing power.
9. All but which of the following are characteristics of service integration devices?
a. One network layer exists between the user and the service access points.
b. Internet and corporate-data traffic intermingle.
c. Customers can be guaranteed control of bandwidth.
d. Synchronous circuit switching enables guaranteed QoS.
e. Transparent support of PDH ensures voice quality.
10. All but which of the following are characteristics of DTM as a content-server network?
a. Scalability in capacity is allowed from 512 kbps to transmission speeds close to the utilization of the fiber.
b. Isolated synchronous channels are provided.
c. Fiber as a shared medium may be used.
d. Channels are multidirectional.
e. Billing per usage of resources is possible.
Glossary >>

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