david@pyr.gatech.EDU (David Brown) (03/14/89)
Hi. I'm interested in using an Encore Annex Terminal Server instead of
regular Sun terminal multiplexors on a Sun server. It seams that they
would offload a lot of the I/O interrupts (line editting, etc) so the
Sun could perform a lot better. Anybody out there had any experience
with Annex terminal servers with non-Encore hardware, especially Suns?
Any responses greatly appreciated.
--David Brown
----------------------------------------------------------------------------
David Brown Armstrong State College, Savannah, Georgia
uucp: ...!{akgua,allegra,amd,hplabs,uunet,seismo,ut-ngp}!gatech!gitpyr!david
ARPA: david@pyr.gatech.edujsloan@thor.UUCP (John Sloan) (03/17/89)
From article <7587@pyr.gatech.EDU>, by david@pyr.gatech.EDU (David Brown): : > ... Anybody out there had any experience > with Annex terminal servers with non-Encore hardware, especially Suns? : The Annex is just a TCP/IP-based terminal server. "Even as I speak" I am using a WYSE 60 cabled to an Annex I, rlogged into a Sun-3/280S. At our University we have deployed 9 Annex terminal servers (and a scad of other makes and models), and they talk to Suns, VAXen (using both Ultrix and VMS/TWG WINS TCP/IP), NCR Towers (using Excelan TCP/IP), etc. with no problems. Someday, in a perfect world, we hope to even be able to telnet to our IBM 3090 mainframe, perhaps in a 3270 emulation mode. Lessen the load? I dunno about that. For every user there will be an rlogin process running in addition to csh etc. Ethernet overhead for full duplex interactive terminal traffic is pretty high. Still, we justify the use of servers just from a functionality/convenience point of view. We don't have to put terminal muxes on every machine. We don't need a data switch. As soon as we attach a new system to the network, we have terminal access to it. We put our modem banks on our Annexen, so that we have dial-up access to any multiuser system on the network. Users can have several concurrent terminal sessions (a big win if you don't have a workstation on your desk). We can place terminal clusters (perhaps with a spooled printer) anywhere along the network. We have students working on terminals, printing on a LaserWriter, seven miles from the timesharing system they use. Ethernet traffic is carried transparently (more or less :-) over a microwave link. Cabling is simpler and easier to manage. A big win in our book. John Sloan +1 513 259 1384 jsloan%spots.wright.edu@relay.cs.net Wright State University Research Center ...!uunet!ncrlnk!wright!jsloan 3171 Research Blvd., Kettering, OH 45420 ...!osu-cis!wright!jsloan Logical Disclaimer: belong(opinions,jsloan). belong(opinions,_):-!,fail.