ETSI - TS 101 388
Transmission and Multiplexing (TM); Access Transmission Systems on Metallic Access Cables: Asymmetric Digital Subscriber Line (ADSL) - Coexistence of ADSL and ISDN-BA in the Same Pair
| Organization: | ETSI |
| Publication Date: | 1 November 1998 |
| Status: | inactive |
| Page Count: | 18 |
scope:
The present document specifies methods for the coexistence of ADSL and ISDN-BA on the same subscriber line. The scope is to establish viable ways enabling the simultaneous deployment of asymmetric services and 160 kbit/s (2B+D) Basic Rate Access with the constraint to use existing transmission technologies as those specified in [1].
The definition of new line codes and/or transmission systems is outside the scope of the present document.
The present document endorses ANSI T1.413 (1998), the contents of which apply with the modifications being covered herein which are related to the following aspects:
1) Methods to allow the simultaneous delivery of ADSL and ISDN-BA services on a single pair. For example the techniques and redefinition of the ADSL signals/parameters as defined in [2] to allows ISDN-BA baseband signals to occupy frequencies below ADSL (from here onwards referred as outband transport).
2) Impacts of the above methods on the ADSL line system performances.
3) Impacts of the above methods on the ISDN-BA transmission systems performances.
4) ADSL backward compatibility.
5) TS 102 080 backward compatibility.
6) Power feeding for the transported ISDN-BA.
7) Latency.
8) ISDN-BA splitter characteristics (cut-off frequencies, order, ...).
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