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Old thread has been locked -- no new posts accepted in this thread
???
12/26/07 16:18
Read: times
#148723
- What datasheet??????
Responding to: ???'s
previous message
List of 56 messages in thread
Topic
Author
Date
Line driver IC
01/01/70 00:00
Telephone lines?
01/01/70 00:00
Slower analog solution..
01/01/70 00:00
That's a job for a transfomer!
01/01/70 00:00
line driver
01/01/70 00:00
Missing the point
01/01/70 00:00
Eh?? What is
01/01/70 00:00
Modem?
01/01/70 00:00
Think Telco even if it's not
01/01/70 00:00
Have you read the datasheet?
01/01/70 00:00
Not the modem speed
01/01/70 00:00
What datasheet??????
01/01/70 00:00
That
is
the datasheet
01/01/70 00:00
I mentioned the chips and you say I havnt
01/01/70 00:00
No, you don't
01/01/70 00:00
Xformer only
01/01/70 00:00
at this low data rate (9600 bps) he could use AMI
01/01/70 00:00
AMI protocol
01/01/70 00:00
who said anything about protocol?
01/01/70 00:00
Difficult and with few software options
01/01/70 00:00
Nobody said anything about a protocol
01/01/70 00:00
Getting ahead of the questions
01/01/70 00:00
fact is ... we don't have the information ...
01/01/70 00:00
Spare wire is already there . We do not
01/01/70 00:00
Getting ahead of the questions
01/01/70 00:00
What type of wire and what environment?
01/01/70 00:00
please stop this mistreatment of a word
01/01/70 00:00
A Protocol is a set of guidelines or rules.
01/01/70 00:00
Apologies , I meant CODEC nor protocols
01/01/70 00:00
I am not sure...
01/01/70 00:00
27 or more solutions exist ...
01/01/70 00:00
~9600bps
01/01/70 00:00
9600 is tough at that distance, so
01/01/70 00:00
Tough?
01/01/70 00:00
Not Tough? but costly.
01/01/70 00:00
Still missing the point
01/01/70 00:00
He did specify the data rate
01/01/70 00:00
Where to apply modulation schemes when
01/01/70 00:00
Oh yes you have!
01/01/70 00:00
Driver/interface
01/01/70 00:00
no
01/01/70 00:00
Maxim Preemph RS-422 driver
01/01/70 00:00
FEET
01/01/70 00:00
speed and distance still apply
01/01/70 00:00
a pretty fancy rf link would fit the cable budget
01/01/70 00:00
Reverse engineer these
01/01/70 00:00
Reverse engineer these
01/01/70 00:00
buy one and find out
01/01/70 00:00
Seems simple enough!
01/01/70 00:00
Why not
01/01/70 00:00
No black (box) magic methinks
01/01/70 00:00
an other blackbox
01/01/70 00:00
current loop vs balanced signal lines
01/01/70 00:00
Have you ever heard of the teletype?
01/01/70 00:00
Bell system teletypes
01/01/70 00:00
10...15years ago
01/01/70 00:00
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