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> Hi,
> Is anyone out there running FACSNet over a "10BaseT, twisted pair"
> ethernet? If so, could you let me know what hardware you're using to
> interface the LANIC card on the HP to ethernet and where to purchase?
> Any help would be greatly appreciated. thanks, tom d.
==============================================================================
> Tom Delohery | Internet: tdeloher@bigmac.mskcc.org Manager, Flow
> Cytometry Core Facility | Phone: (212) 639-8729 Memorial Sloan-Kettering
> Cancer Center | Fax: (212) 794-4019
==============================================================================
The most logical way to hook up a computer with a thin coax port (like the HP
340) to a 10Base-T network would be to use a transceiver that has a 10Base-T
connector and a coax connector. A hub would be overkill as would a repeater.
I have tested the CTP100-T from Cabletron and it works great. A nice feature
of this unit is that it allows you to connect up to 10 ethernet devices on
the coax segment.
If you have several devices in close proximity to each other, you shouldn't
have to buy multiple transceivers. The coax segment can be up to 100m in
length. When you hook everything together, don't forget to terminate the end
of the coax segment!
Here's what Cabletron's catalog says about the unit:
"Cabletron's CTP100-T Coax-to-Twisted Pair Transceiver is intended for use in
10BASE-T compatible Ethernet systems. The CTP100-T supports up to 100 meters
each of coax and twisted pair cabling. As many as 10 nodes may be connected
to the coax segment. The CTP100-T is extremely useful in environments where
thin Ethernet cards have been purchased and installed. The tranceiver's other
features include automatic polarity correction and indication which detects
whether receive pair polarity has been inverted. If an error is detected, the
CTP100-T will correct the polarity for the proper reception. In addition, the
CTP100-T filters noise induced on the receiver pair to prevent noise-induced
false collisions."
Here are the specs on the unit:
Type of Interface: 10Base-T(RJ45)
10Base-2(BNC)
Number of ports: 1
Weight: 7 oz.
Dimensions: 3.3"H x 5.3"W x .9"D
Max Coax Length: 100m
Max Twisted Pair: 100m
Max # of Nodes on Coax: 10
MTBF: 931,098 Hours
List Price: $600
Special Purchase Price: $375
I have lots of experience with Cabletron and they make top-notch equipment.
You should never experience trouble with this unit!
I have talked to our rep at Cabletron and he has agreed to sell the units at
a special rate of $375.
Contact: Jan Boldman
(408) 441-9900 ext. 1226
Tell her that you were referred by Ron Mickaels (pronounced the same as
Michaels) from Becton Dickinson.
*******
If you donUt have an application to do FTP transfers to the Mac, you may
want to consider TCP/Connect II from InterCon. This is the program that I use
to receive files from FACSNet HP and IUve had good success with it. ItUs got
lots of features that you probably donUt need and itUs kind of expensive, but
there arenUt too many FTP/TCP/IP programs out there! The program should be
available at Egghead software and other distributors.
*******
One other note: When specifying IP addresses for your computers, remember to
1. generate a unique address for each node and
2. NOT use 255 or 128 in the address. For example: the address 1.4.2.4 is a
valid address, but the address 1.255.128.45 could cause problems! This is not
to say that you can't use these addresses, but most of the liturature that I
have read says that you can have problems if you use them. Something to do
with routing signals to subnets.
*******
Please keep in mind that this is not an "official" Becton Dickinson
recomendation. If you try this setup and it does not work for you, PLEASE do
not call our service department! They will not know what you are talking
about! The first time that I hooked this stuff up to our network it took me 2
hours to get it to work. My point is that the problem wasn't with the
equipment, it was problems with the network. If all is ok with your network,
then it should work fine!
HAPPY CRUNCHING!
***********************************************
Ron Mickaels
Senior Research Software Engineer
Becton Dickinson Immunocytometry Systems
San Jose, California, USA
***********************************************
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