Re: (ASCEND) DSL Pipes

["Hartmut Schroeder" <hacko@mms.de>]

Date sent:      	Wed, 07 Jun 2000 18:22:42 -0500
To:             	ascend-users@bungi.com
From:           	Jim Logan <jim@top.net>
Subject:        	(ASCEND) DSL Pipes

> 
> Hi, hope someone can help out. I notice the new Lucent (ascend) P50's that 
> come out are also DSL Pipes?  Is this two dif beasts, or one beast that can 
> now do DSL as well as std ISDN/Frame, etc like always?  Can it be used only 
> with a DSL Circuit? or will it work just like a reg P50-1UBRI as a ISDN 
> Connection to any other ISDN capable receiving ISP Side for Internet 
> use.  New unit models are identical to the old ones (P50-1UBRI-ASA), but 
> now also labeled as DSL Pipe. I'm kinda confused - any help with anyone 
> using the DSL Pipes would be appreciated.

I really know what you mean :-)
There are two major groups that you must know:

1.) How is the medium (copper) physically used:
 a. IDSL (basically the US-BRI interface (called U0)) max speed 128kbps symetric
 b. SDSL symetric line max speed 2.3mbps
 c. ADSL-CAP asymetric line max 7mbps download and 1mbps upload
 d. ADSL-DMT asymetric line littlebit slower than ADSL-CAP but more robust

 All physical Connections (EXEPT FOR SDSL) need diffrend Hardware for both Sides
 and are Host/Client in hardware.

2.) How is the transport used ontop of the Physical connection.
 a. "DSL"pipe what means they exchange PPP/FR-Packets directly. (the first generation)
 b. "Cell"pipe means the lowest exchange layer is ATM and PPP/FR may sit ontop of that.
    (the second generation (host is the Stinger))

For your Question that means on the ISP-Side you need an IDSL-Hostcard
and a Pipe-UBRI Modell on the Clientside. (but I can't recomment ISDL because
it's simply to slow)

Regards H.Schroeder


Hartmut Schroeder             MMS Communication AG
mailto:hacko@mms.de           Eiffestrasse 598
http://www.mms.de/~hacko      20537 Hamburg, Germany
Phone: +49 40 211105-40       Fax: +49 40 210 32 210
UTM 32U0569835 5934083 WGS84
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