10baseT to 10base2

10baseT to 10base2

Post by Rick Dasilv » Sat, 22 Feb 1997 04:00:00



Hello,
I have just purchased a new computer to put on a 10base2 ethernet network
but
the NIC that is currently in the machine is 10baseT only. Now, my question
is how
do I connect this computer to the network? Is there a media converter
(10baseT to 10base2) that I can use with a straight through patch cable?

Any help would be greatly appreciated.

Rick Dasilva.

 
 
 

10baseT to 10base2

Post by Rudi Peter » Sun, 23 Feb 1997 04:00:00



> Hello,
> I have just purchased a new computer to put on a 10base2 ethernet network
> but
> the NIC that is currently in the machine is 10baseT only. Now, my question
> is how
> do I connect this computer to the network? Is there a media converter
> (10baseT to 10base2) that I can use with a straight through patch cable?

> Any help would be greatly appreciated.

> Rick Dasilva.

--
Hi Rick,

There are adapters (baluns) available that will convert 10baseT to
10base2.  Check out AMP.

Regards, Rudi.
* -------------------------------------------------------------------*
| Rudi Peters, RCDD           University of B.C., Telecommunications |

* --- The opinions expressed are my own and not the University's --- *

 
 
 

10baseT to 10base2

Post by Mike Bunnel » Sun, 23 Feb 1997 04:00:00



> Is there a media converter
> (10baseT to 10base2) that I can use with a straight through patch cable?

I was in the same situation.  Although media converters are available,
they were almost as expensive as (a) replacing the NIC, or (b) buying a
10BaseT hub which also includes a coax port, if you have the possiblity
of adding more 10BaseT machines in the future.

Mike

 
 
 

10baseT to 10base2

Post by Michael Sal » Mon, 24 Feb 1997 04:00:00


 "> Is there a media converter
 "> (10baseT to 10base2) that I can use with a straight through patch cable?
 "
 "I was in the same situation.  Although media converters are available,
 "they were almost as expensive as (a) replacing the NIC, or (b) buying a
 "10BaseT hub which also includes a coax port, if you have the possiblity
 "of adding more 10BaseT machines in the future.

When I had the same problem, a 5-port minihub with 1 BNC, 4 RJ45 ports was
_CHEAPER_ than a single media converter. So I put the minihub in, and it
has been fine ever since.

Best wishes,
--
Michael Salem

 
 
 

10baseT to 10base2

Post by Mike O'Donne » Tue, 25 Feb 1997 04:00:00





>> Hello,
>> I have just purchased a new computer to put on a 10base2 ethernet network
>> but
>> the NIC that is currently in the machine is 10baseT only. Now, my question
>> is how
>> do I connect this computer to the network? Is there a media converter
>> (10baseT to 10base2) that I can use with a straight through patch cable?

>> Any help would be greatly appreciated.

>> Rick Dasilva.

>--
>Hi Rick,

>There are adapters (baluns) available that will convert 10baseT to
>10base2.  Check out AMP.

Balus do NOT convert 10base2 to 10baseT.  They only take the signal on
the coax data and convert it for use on UTP cable.  They do not split
out the trasnmit and receive.  It allows you to use UTP instead of
coax cable.  It's still a "10base2" type signal.  10baseT has transmit
and receive on different pairs.  The baluns do not split the
tran/receive signal.

To convert 10base2 to 10baseT, you need a "media converter".  I've
seen them a few places (Black Box comes to mind), but they usually
cost more than a basic 8 port 10baseT hub with a BNC connector.

Mike O'Donnell
City of Columbus
Public Service Department
Engineering & Construction Division
All opinions expressed are my own, and do not reflect the opinions
of my employer.

EMAIL ADDRESS ALTERED TO REDUCE SPAMMING
To send EMail, remove ~*~ from email address

 
 
 

10baseT to 10base2

Post by John Lundgr » Tue, 25 Feb 1997 04:00:00


: >
: > Hello,
: > I have just purchased a new computer to put on a 10base2 ethernet network
: > but
: > the NIC that is currently in the machine is 10baseT only. Now, my question
: > is how
: > do I connect this computer to the network? Is there a media converter
: > (10baseT to 10base2) that I can use with a straight through patch cable?
: >
: > Any help would be greatly appreciated.
: >
: > Rick Dasilva.

: --
: Hi Rick,

: There are adapters (baluns) available that will convert 10baseT to
: 10base2.  Check out AMP.

These are NOT baluns.  They are active devices that plug into power with
a wall wart.  Strangely, they cost $150 US, and the price of a hub with
both a coax and 8 cat5 ports is only $120 or so, $30 cheaper.  So it's
wise to buy a small hub.

True baluns will not convert coax to cat5 .

: Regards, Rudi.
: * -------------------------------------------------------------------*
: | Rudi Peters, RCDD           University of B.C., Telecommunications |

: * --- The opinions expressed are my own and not the University's --- *

--

#===================================================================#
| U s e   t h e   E M A I L   a d d r e s s  i n  t h i s   .S I G  |

|    Rancho Santiago Community College District  |  rancho.cc.ca.us |
|     17th St at Bristol \ Santa Ana, CA 92706   | http://www.rancho|
| My opinions are my own, and not my employer's. |    .cc.ca.us     |
!  You MAY NOT use my email address for unsolicited Email or lists! !
#======P=G=P==k=e=y==a=v=a=i=l=a=b=l=e==u=p=o=n==r=e=q=u=e=s=t======#

 
 
 

10baseT to 10base2

Post by John Lupt » Wed, 26 Feb 1997 04:00:00



=>Hello,
=>I have just purchased a new computer to put on a 10base2 ethernet network
=>but
=>the NIC that is currently in the machine is 10baseT only. Now, my question
=>is how
=>do I connect this computer to the network? Is there a media converter
=>(10baseT to 10base2) that I can use with a straight through patch cable?
=>
=>Any help would be greatly appreciated.
=>
=>Rick Dasilva.

Double check your NIC to make sure you really only have an RJ45 interface -
you may not realize it, but if you have a 15-pin AUI interface on the NIC as
well, the adapters that plug into the AUI and connect directly to the coax are
relatively cheap, about $20-$25 depending on where you buy them.

If you don't have an AUI port on the NIC, the next best solution would be
either a cheap 10BT hub that has a BNC connection as well, assuming that in
using such a device you don't violate any repeater count rules, or a new NIC.
If it's a PC or a Mac you just bought, you can get decent coax-ready ethernet
cards for anywhere from $20-$100. If I were in your shoes, I'd probably go
ahead and get a new NIC - if your budget permits, get a "combo", i.e., has
both 10BT and 10B2. SMC and 3Com both make good cards of this type.

Some folks may try to steer you toward a gizmo called a "media converter", but
that doesn't come into play here - media converters allow you to attach coax
(10B2) devices to a 10BT network, not the other way around, and they tend to
cost as much or more ($150-$300) as a new NIC in most machines. We keep a few
around to use with older unix stations where the cost of a new NIC runs around
$750, otherwise there's not a big demand for them.

************************************************
John Lupton, LAN Specialist        
Communications & Network Svcs      
University of Pennsylvania, School of Arts & Sciences          

http://www.sas.upenn.edu/~jlupton/home.html
************************************************

 
 
 

10baseT to 10base2

Post by John Ruckstu » Sat, 01 Mar 1997 04:00:00



Quote:> I have just purchased a new computer to put on a 10base2 ethernet network but
> the NIC that is currently in the machine is 10baseT only. Now, my question
> is how do I connect this computer to the network? Is there a media converter
> (10baseT to 10base2) that I can use with a straight through patch cable?

Some replies have commented that, strangely,  "media converters" are more
expensive than "hubs".
Not so strange -- media converters are designed to retransmit signal
without introducing an additional delay -- they are not considered
"repeaters" in Ethernet design (although some count it as a half of a
repeater).
Hubs are multiport "repeaters", not multiport "media converters"


Quote:> Some folks may try to steer you toward a gizmo called a "media converter", but
> that doesn't come into play here - media converters allow you to attach coax
> (10B2) devices to a 10BT network, not the other way around, and they tend to
> cost as much or more ($150-$300) as a new NIC in most machines. We keep a few
> around to use with older unix stations where the cost of a new NIC runs around
> $750, otherwise there's not a big demand for them.

Media converters do "work both ways".  You could use a media converter
if you really wanted to.  The demand for them is not so
great because, with low cost bridges/switches available, it often makes
more sense to split an Ethernet rather than buy expensive media
converters to extend an Ethernet that is at the limit of the 3-4-5 rules.

If Ethernet rules aren't broken by inserting a hub, then insert a hub.
--

 
 
 

10baseT to 10base2

Post by John Lundgr » Sat, 01 Mar 1997 04:00:00



: > I have just purchased a new computer to put on a 10base2 ethernet network but
: > the NIC that is currently in the machine is 10baseT only. Now, my question
: > is how do I connect this computer to the network? Is there a media converter
: > (10baseT to 10base2) that I can use with a straight through patch cable?

: Some replies have commented that, strangely,  "media converters" are more
: expensive than "hubs".
: Not so strange -- media converters are designed to retransmit signal
: without introducing an additional delay -- they are not considered
: "repeaters" in Ethernet design (although some count it as a half of a
: repeater).
: Hubs are multiport "repeaters", not multiport "media converters"

But they work okay.


: > Some folks may try to steer you toward a gizmo called a "media converter", but
: > that doesn't come into play here - media converters allow you to attach coax
: > (10B2) devices to a 10BT network, not the other way around, and they tend to
: > cost as much or more ($150-$300) as a new NIC in most machines. We keep a few
: > around to use with older unix stations where the cost of a new NIC runs around
: > $750, otherwise there's not a big demand for them.

: Media converters do "work both ways".  You could use a media converter
: if you really wanted to.  The demand for them is not so
: great because, with low cost bridges/switches available, it often makes
: more sense to split an Ethernet rather than buy expensive media
: converters to extend an Ethernet that is at the limit of the 3-4-5 rules.

: If Ethernet rules aren't broken by inserting a hub, then insert a hub.
: --

--

#===================================================================#
| U s e   t h e   E M A I L   a d d r e s s  i n  t h i s   .S I G  |

|    Rancho Santiago Community College District  |  rancho.cc.ca.us |
|     17th St at Bristol \ Santa Ana, CA 92706   | http://www.rancho|
| My opinions are my own, and not my employer's. |    .cc.ca.us     |
!  You MAY NOT use my email address for unsolicited Email or lists! !
#======P=G=P==k=e=y==a=v=a=i=l=a=b=l=e==u=p=o=n==r=e=q=u=e=s=t======#

 
 
 

1. Shielding/Emanations difference with 10baseT(5)/10base2/Fiber

Can someone tell me the specific differences between 10baseT level-5,
10base2, and fiber--regarding their susceptibility to other electrical
emissions, crosstalk, jitter, etc?  I am also concerned with how
susceptible those media are to being "picked up" by someone attempting
to monitor (read) the signal based on emanations?

Which of this media is best for this and why?  I understand that
fiber is the obvious answer, but between 10baseT level-5 and
10base2, which is more favorable in this area.  I have recently
heard that 10baseT level-5 is as good as if not better than 10base2,
(from an emissions standpoint), but no specific reasons were given.

I have also found that a fiber install is about 3 times the cost
of 10base2, and that a 10baseT level-5 install is about 2 times
the cost of 10base2.  I'm trying to decide on both a cost efficiency
standpoint as well as the concern for emanations, etc.

Any other pros vs. cons that you can offer regarding this decision
would be appreciated.--Thanks.


--
                                 Robert B. Reinhardt, Senior Staff Analyst
  /                 /            ARINC Research Corporation, MS 5-230,
 /__,_  _  o ____  /_  __.  __   2551 Riva Road, Annapolis, MD. 21401

2. Help: Got Apple SCSI Card - No Formatting Software!

3. 10baseT and 10base2

4. cperl-mode 4.32 always produces error message

5. free modeling tools?

6. Question regarding 10BaseT -> 10Base2

7. FS: Epson JX-80 color dot matrix printer

8. ***Advantages and disadvantages of 10BaseT vs. 10Base2?***

9. Looking for 10baseT to 10base2 converter

10. Problems connecting 10BaseT to 10Base2

11. 10baseT and 10base2

12. 10baseT to 10base2 Transceiver