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B7.3.2 DSL Device - Industry Standards
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| bet | 137/188 | | Sana | 21.03.2017 | | Hajmi | 0,89 Mb. | | #429 |
Note: This list provides complete titles and web locations for references cited. The listing of a reference here does not imply that complete compliance with that reference is a Windows Logo Program requirement.
http://www.microsoft.com/hwdev/tech/network/dsl/default.asp
http://www.atmforum.com
Integrated ADSL modems exposing an Ethernet interface must meet requirement for, “Adapter supports filtering for multicast addresses.”
B7.3.2.3.1 ITU-T G.994.1, G.991.1, G.992.2. B7.3.2.3.2 T1.413 Issue 2 (G.992.1).
ITU-T G.994.1, Handshake procedures for digital subscriber line (DSL) transceivers, is the international standard that defines mechanisms to allow DSL transceivers to exchange capabilities and to select a common mode of operation. G.994.1 supports modulation standards G.991.1 High bit-rate Digital Subscriber Line (HDSL), G.992.1 (full-rate discrete multitone [DMT] ADSL), G.992.2 (“G.lite” DMT ADSL), T1.413 Issue 2 (ANSI full-rate ADSL), and T1 TR-59 (CAP/QAM).
Use of G.994.1 allows the customer premises and central office DSL modems to negotiate a common mode of operation, and more importantly, identifies the cause of failure when the link is not established due to the incompatible modes of operation of the two modems.
B7.3.2.3.3 U.S. T1 Committee Technical Report TR-59.
U.S. T1 committee Technical Report TR-59, “Single-Carrier Rate Adaptive Digital Subscriber Line (RADSL),” is the industry consensus specification for CAP/QAM ADSL modems. ADSL modems that support CAP/QAM modulation must implement TR-59. CAP/QAM ADSL modems may also support other modulation methods such as DMT.
Note: TR-59 is not a U.S. ANSI standard for ADSL modems, but is supported by some network access providers.
CAP/QAM ADSL modems must support G.994.1; see B7.1.4.5
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