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Re: IP: Pac Bell says Net use may collapse phone system
- To: hbryant@sjmercury.com
- Subject: Re: IP: Pac Bell says Net use may collapse phone system
- From: Robert Berger <rberger@Internex.NET>
- Date: Thu, 24 Oct 1996 20:23:18 -0700 (PDT)
- Cc: letters@sjmercury.com
- In-Reply-To: isdn@essential.org "ISDN digest 191" (Oct 24, 7:19am)
- References: <199610241119.HAA21108@prince.essential.org>
Concerning San Jose Mercury News Article Published: Oct. 24, 1996 BY HOWARD
BRYANT
Its obvious to me that whatever "ISP Executive" Howard Bryant talked to knows
as much about how the phone system works as most ISPs (ie not more than how to
order some phone lines and T1s... of course Telcos know even less about the
Internet :-)
The core of what Pac Bell claims is true: On a dialup system (i.e. the phone
network that your phones are connected to) there is limited switching capacity
(the multi-million dollar 5ESS or DMS-100s in most Central Offices) and
trunking capacity (the bandwidth capacity between Central Office Switches).
The ratio of lines from homes/offices to switching/trunking capacity has been
based on a long history of calls being used for voice that last only a few
minutes on average. The ratio has traditionally been very high (many more lines
to switching/trunking capacity). Adding more swtiching and trunking capacity is
very expensive compared to the cost of adding more lines.
When a large number of lines start having phone calls that last significantly
longer than a few minutes radically shift the required ratio of lines to
switching/trunking. To keep phone service ready and realiable (ie the amount of
time it takes from when you pick up a phone to when you get dialtone or to not
get a fast busy signal when you dial), the phone company would have to ether do
SIGNIFICANT buildout of switches and trunking OR (and this was not discussed in
the article or probably the press release) develop a system to have calls
destined for on-line services / internet services BYPASS the traditional
switches and trunks.
Now don't get me wrong, I am not a cheerleader for the Phone
companies. I said that the core of what Pac Bell said is true, but I stongly
disagree on that raising access fees and tarrifs are not the right way to
deliver a solution to the demand for lots of long connections to the Internet!
The proper approach is the one that phone companies should be pushed to do. The
RBOCS have already put out a Request for Quote on such systems. Nortel has been
the first to respond
(http://www.nortel.com/home/press/1996c/8_28_96235Internet_Thruway.html),
but there are many other companies gearing up to address this problem.
In fact, several of the solutions being proposed would integrate xDSL services
into the solution. This means that the RBOCs could fix their switch/trunk
overload problem AND deploy xDSL on a faster track at costs MUCH LOWER and
performance much higher than by building more switching and trunking capacity.
[xDSL is a family of proposed services (ADSL, HDSL, SDSL, VDSL) that use the
same copper wire from your house to the Central Office as your phone, but
instead it connects to a special hardware that routes normal phone calls to the
traditional switch and data traffic can go right to a dedicated high speed
backbone. In fact it can carry data at rates significantly higher than ISDN,
from 384kbps to as much as 6Mbps]
This means that there is NO NEED TO CHARGE ACCESS FEES TO ISPs (unless they
insist on using dialup when there are bypass services in place). Some say that
instead of charging enhanced service providers, they should just drop the
access fess for everyone, but thats another story.
There should not be any special tarrifs to build the bypass / xDSL / high
bandwidth backbone. That will be payed for by appropriate market based pricing
for those services themseleves. The Phone Companies do need to learn that huge
demand is not a problem that should be stamped out by raising prices, but by
using appropriate technology to deliver a solution and increasing their market
share. The huge switch based phone system infrastructure is in the same place
as the Mainframe was. We now have more computing power than ever at lower costs
and in a distributed manor. The phone companies should be planning for the same
transition.
By the way, the fact that a phone company is adding many more lines does not
show that they are increasing the switching capacity as under the traditional
ratios they can easily add more lines and have very minor impact on the
switching capacity.
If concerned citizens want to have lower cost, higher performance long connect
times to the Internet, they should encourage the Phone Companies and PUCs to
quickly deploy the bypass concept and eventually, xDSL.
--
Robert J. Berger - CTO / Founder
InterNex Information Services, Inc. 2302 Walsh Rd. Santa Clara, CA 95051
Voice: 408-327-2290 Fax: 408-496-5484