ZyXEL Communications Prestige 642M series Guía de usuario descargar pdf (Pagina 154)

Prestige 642 ADSL Internet Access Router

xxii Standards

Standards

The Prestige supports “Multi-Mode”, G.dmt, G.Lite, ANSI T1.413, and “Normal Open” ADSL operational

protocols.

Please note that not all P642 firmware versions support all standards!

Multi-Mode

Normal Open.

These both refer to the way the Prestige detects which operational protocol the

DSLAM (Digital Subscriber Line Access Multiplexer) is using and adjust

automatically. The DSLAM is a network device, usually at a telephone company

central office, that receives signals from multiple customer Digital Subscriber

Line connections such as the Prestige and puts the signals on a high-speed

backbone line using multiplexing techniques.

ANSI T1.413 The ANSI T1.413 Issue 2 is the American version of the ITU G.dmt standard, i.e.,

full rate ADSL.

Full Rate (G.dmt) Full rate ADSL, with transmission speeds of up to 8 Mbps downstream and 646

Kbps upstream, was originally intended for video applications but is now also

targeted at bringing high-speed Internet access to residential and small business

users.

G.Lite The Universal ADSL Working Group (UAWG) developed the G.Lite/DSL Lite

standard (also referred to as "splitterless" DSL or as Universal DSL) to create a

universal, splitterless, and therefore easy to install lower-speed version of ADSL.

The G.Lite version of ADSL is capable of providing transmission speeds of 1.536

Mbps downstream and 512 Kbps upstream (still 8 to 10 times faster than ISDN).

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ZyXEL Communications Prestige 642M series Guía de usuario Pagina 154