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User& is right when he says "your baud rate's as low as the slowest
connection between any two computers". Should have stopped there.
If you're communicating with a 300 baud modem (~30 bytes/sec) why do you
think you could communicate faster with it by put a T1 or even a T3 on the
other end. 300 baud is 300 baud period.
What will happen is this: you will transmit an IP packet at T1 speed thru
your connection. If this is thru a typical internet connection, it will
take 10 to 20 hops across the internet. In most cases, each hop across the
net will end at a router. Each router receives and buffers each packet that
it receives. It looks at the header, determines where the packet is going
and then sends the packet out across the next hop. Some of these hops will
be connected by T1's, some will be T3's, some will be 100Mb ethernet, some
will be 1000Mb ethernet. At each hop, the packet travels across the wire at
whatever speed the 2 endpoints are capable of.
When the packet gets to the router in front of the 300 baud modem, the
router will begin transmitting the packet to the modem at 300 baud. Long
before it finishes sending that first packet, the router will receive the
second packet you sent (depending on the protocol being used). At this
point, the behavior is protocol- and router-dependent. In some cases the
router will buffer the second packet until it finishes sending the first.
In other cases the router will drop the packet and may or may not send
notice back to your comm equipment to stop transitting until it finishes
sending the first packet.
But in no case can the 300 baud modem receive data faster than 300 baud.
That's why it's called "300 baud". Ditto for sending.
Kent
----- Original Message -----
From: "User &" <dcswest@xxxxxxxxxxxxx>
To: <realtraders@xxxxxxxxxxxxxxx>
Sent: Tuesday, July 02, 2002 5:14 PM
Subject: Re: [RT] GEN: TRADING LINES: T-1 & DSL
A T1 line's roughly equivalent to a 1,544,000 baud rate, which is bits
(1 character = 16 bits) per second, in this case between your computer
and your ISP's computer. Although your baud rate's as low as the
slowest connection between any two computers carrying your signal over
the internet, including that other end's connection to the internet,
you're unlikely to see anything nearly as low as a 300 baud rate. You
might see more like 300 KBytes (8 bits = 1 byte) per second with
something like a cable modem instead!
Hope that helps,
On Tue, 2002-07-02 at 12:41, charles meyer wrote:
> Group-
>
> Would anyone care to tap out a few comments on the technical difference?
> I was told that a T1 line is just a 1.544 MB line. (Not sure what those
> numbers mean though<g>)
>
> I'm told that if the other end as a 300 baud moden; its still 300 baud,
> etc...
> Does my confusion make any sense?<g>
>
> chas
>
>
>
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