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Non-Tech : Amati investors
AMTX 1.500+3.4%Dec 9 3:59 PM EST
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To: Gary Brack who wrote (24540)9/10/1997 6:20:00 PM
From: srvhap   of 31386
 
[Flavors of DSL]

"I was wondering if someone could provide a brief description of the differences of the various xDSL technologies and how they fit together."

Gary,

DSL stands for high-speed Digital Subscriber Line. It provides a dedicated digital circuit from your home to the telephone company's central office, using normal, copper telephone line. DSL also provides a separate channel for voice phone conversations, which means can be conducted at the same time high-speed data is flowing across the line. xDSL is a generic term that includes several variations:

ADSL (Asymmetric Digital Subscriber Line); 1.5 Mbps/64 Kbps-384 Kbps.
HDSL (High-bit-rate Digital Subscriber Line); 1.5 Mbps/1.5 Mbps.
SDSL (Single-line Digital Subscriber Line; 1.5 Mbps/1.5 Mbps.
IDSL (ISDN Digital Subscriber Line); 128 Kbps/128 Kbps
RADSL (Rate Adaptive Digital Subscriber Line); various speeds

Pricing has not yet been determined. Most believe the price point to fall at around $500.00 for the modems. I believe that in addition to rental fees we will have to pay the telcos for the modems that we are going to see the TelCos charge rates that are quite high (maybe even hourly or by the bit. Consider, that today the following is charged by the Telcos:

.128 Mbsp (ISDN) $50.00 - $100.00 per month
1.544Mbsp (T-1) $1100.00-$2500.00 " "
45 Mbps (T-3) $18-25K per month
155 Mbps (OC3) ????
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