berger@datacube.UUCP (04/01/87)
Can anyone give a synopsis of multiple tranciever interfaces to
ethernet? Micom/Interlan has announce one but it is not available till
August! Can one use the DEC DELNI with generic ethernet (Sun's, Pyramid)?
By multiple tranciever interface, I mean a box that connects to one tap
on the ethernet cable and then offers multiple (8) tranciever ports so
that multiple ethernet controllers can connect to this one box.
Bob Berger
Datacube Inc. Systems / Software Group 4 Dearborn Rd. Peabody, Ma 01960
VOICE: 617-535-6644; FAX: (617) 535-5643; TWX: (710) 347-0125
UUCP: ihnp4!datacube!berger
{seismo,cbosgd,cuae2,mit-eddie}!mirror!datacube!bergered@mtxinu.UUCP (04/02/87)
>Can anyone give a synopsis of multiple tranciever interfaces to >ethernet? Micom/Interlan has announce one but it is not available till >August! Can one use the DEC DELNI with generic ethernet (Sun's, Pyramid)? Fanout boxes, as they're often called, are available from DEC (as you've noted), TCL, Excelan, and probably others. The same constraints apply as for mixing controllers with transceivers - that Ethernet 1 controllers match to E1 transcehvers; E2 controllers to E2 transceivers, and 802.3 to 802.3. (Actually, mix and match often works, but I never count on it.) -- Ed Gould mt Xinu, 2560 Ninth St., Berkeley, CA 94710 USA {ucbvax,decvax}!mtxinu!ed +1 415 644 0146 "A man of quality is not threatened by a woman of equality."
scarter@caip.UUCP (04/03/87)
In article <330@mtxinu.UUCP> ed@mtxinu.UUCP (Ed Gould) writes: > >Fanout boxes, as they're often called, are available from DEC (as you've >noted), TCL, Excelan, and probably others. Don't mean to be commercial, but also check out the one from Cabletron. They have a new fan-out, aka the MT-800. We just received one on a demo and it is a very cute little box. -Stephen Carter uucp: ...{harvard, seismo, ut-sally, sri-iu, ihnp4!packard}!topaz!scarter arpa: SCARTER@RED.RUTGERS.EDU
berger@datacube.UUCP (04/03/87)
To stop the flood of unanimous responses, here is a synopsis:
From mirror!necntc!adelie!mirror!sundc!hqda-ai!merlin Thu Apr 2 00:45:57 1987
Yes, you can use the DELNI with Sun. The ethernet standard
is incredibly complete, and it includes the interface between the
drop cable and the transceiver.
I'm operating on GSA pricing, so my numbers aren't the same
as yours, but I found two other companies that produce this thing:
Micom-Interlan 800-526-8255 "8-for-1"
Excelan 800-392-3526 "Fanout"
Micom is coming down from a big order, so they may be backed up a
bit. I think Excelan delivers about 3 weeks after order. Both of
these devices can be hooked into a real transceiver, if you want
to put 8 computers on the ether cable at the same location. You
will need an extra transceiver and transceiver cable to do that.
Hope this helps,
From pyrnj!pyramid!weitek!cae780!gvgpsa!davew Thu Apr 2 14:09:35 1987
We use DELNIs to connect MVAXs with AT clones equipped with 3Com 3C501
Etherlink cards and are in the process of hooking up a bunch of
Cadnetix workstations and routers. As long as you stay 802.3
compatible you shouldn't have any problems. You might also want
to check out the MT-800 from Cabletron systems which is priced
less than the DEC DELNI (depending upon your DEC discount rate) and
has a lot of LEDs to show the status of each port and collision.
From ihnp4!brunix!dad Thu Apr 2 15:43:47 1987
We have all sorts of computer equipment here
that uses ethernet. (DEC,apollo,sun,HP,imagen,
encore,symbolics)
We use DEC delni's and TCL's multiport box.
They both work fine. I have the DEC ones
because they were free (we got a grant) and when
we had to spend our own money we got the TCL box.
It is cheaper and modular. If a port dies you
remove just that board rather than replacing the
whole box.
From pyrnj!rutgers!rochester!srs!lee Thu Apr 2 17:10:52 1987
When I was at TRW, we used DEC DELNI's with a large Ethernet cosisting
of Sun's, Vaxes, Apollo's, Pyramids, and an IBM mainframe! We never had
any problems that were caused by the DELNI. We used the DELNI's in both
standalone mode and connected to the backbone network via a DEC H-4000
xcvr. The DELNI gets my highest praise. The only problems with it are:
1) Rackmount kit is listed as an available part, but DEC never actually made
it. We made our own which worked great (the case must be removed, but the
inner case is all set up for mounting rackmount plates.
2) The box is a bit on the light side, so the weight of 9 xcvr cables can
tip it over.
These problems are minor. Electrically, the box is very sound. To make it
work with a Sun, you must use Sun ethernet controllers (not old 3Com boards),
and there is a jumper on the Sun board, which is referred to in the Sun manuals,
which must be removed. The jumper is also found on Sun's 'big board' VMEbus
CPU's.
From pyrnj!rutgers!cit-vax!elroy!smeagol!earle Fri Apr 3 00:43:32 1987
You can use a DELNI with a Sun. Another section here at JPL uses a DELNI
and plugs a MicroVAX II and a couple of Suns and a couple of PC's with a
3Com board stuck in them into it.
From rhorn@infinet.uucp Fri Apr 3 05:37:45 1987
YES. We have two VAXen, two micro-Vaxen, and three Sun's attached to
a DELNI that is attached to a transceiver, and thence via barrel
connector to thin ethernet to some more Sun's and PC's (using PC-NFS).
Works just fine.
Bob Berger
Datacube Inc. Systems / Software Group 4 Dearborn Rd. Peabody, Ma 01960
VOICE: 617-535-6644; FAX: (617) 535-5643; TWX: (710) 347-0125
UUCP: ihnp4!datacube!berger
{seismo,cbosgd,cuae2,mit-eddie}!mirror!datacube!berger