Change search
ReferencesLink to record
Permanent link

Direct link
ADL-32 and ADL-64: voice and Ethernet integration over ADSL/ADL
2002 (English)Independent thesis Advanced level (professional degree), 20 credits / 30 HE creditsStudent thesis
Abstract [en]

The first part of this master’s thesis describes the ADL technology, a version of the widely known ADSL technology. The main difference between ADL and ADSL is the way to use low frequencies. In ADSL, these frequencies are used to transmit POTS or ISDN services, whereas in ADL, they are used for data transmission in the upstream direction. The use of the low frequencies for data transport and transmitting voice digitally inside the data stream allows to use the available bandwidth more efficiently, reduce noise level in the ADL signal and avoid to use analog splitters. The first part represents a theoretical background helping to understand principles of ADSL/ADL and considers in detail reasons of evolution of the ADSL into the ADL. It also researches performance of ADL systems. Today Ethernet is the most popular local network technology. As a natural extension, Ethernet can be used by home users as a common protocol for all network accesses. As the physical layer protocol, the ADSL/ADL technology looks like the best alternative for high bit rate connection between a residential user and a provider. The simultaneous transmission of the Ethernet data and POTS/ISDN can be carried out by two alternative methods. The first method is to transmit POTS/ISDN signals as it is done in usual telephone networks i.e. by using low frequencies and separating these signals from the higher frequency data signal by using the analog splitters. The second method is to integrate POTS/ISDN information and Ethernet data into the DSL signals. The second part of this master’s thesis presents a protocol to integrate Ethernet traffic and telephone traffic on the same ADSL/ADL link. It also describes requirements on quality of POTS/ISDN services and verifies the proposed protocol on requirements fulfillment.

Place, publisher, year, edition, pages
Keyword [en]
Technology, ADL, ADSL, DMT, Ethernet, ISDN, POTS, PSTN, voice, integration
Keyword [sv]
URN: urn:nbn:se:ltu:diva-43241ISRN: LTU-EX--02/148--SELocal ID: 11f174d9-c780-49d6-886d-0520f5efcedfOAI: diva2:1016471
Subject / course
Student thesis, at least 30 credits
Educational program
Electrical Engineering, master's level
Validerat; 20101217 (root)Available from: 2016-10-04 Created: 2016-10-04Bibliographically approved

Open Access in DiVA

No full text

Search outside of DiVA

GoogleGoogle Scholar

Total: 1 hits
ReferencesLink to record
Permanent link

Direct link