> > From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED]] > > Sent: Wednesday, January 08, 2003 5:11 AM > > To: [EMAIL PROTECTED] > > Subject: Re: 3270 emulation packages > > I appologize for my misunderstanding. What I am looking for is a > > software emulation package to replace a 3270 controller unit (i.e. a > > 3174). > > > > - Jason Herne > > Now I'm confused. Do you want a program which will run on Linux/390 which > communicates to a real 3270 terminal without a 3174? 3270s are attached to a > 3174 via coax (normally). There is no way to coax attach directly to an IBM > mainframe.
There is one more possible permutation -- replace the 3174 with a channel attached Linux system, ie in the case of the requirement for a non-SNA console terminal. If so, there are a couple of variations. One is to buy a 2074. This box provides a channel-attached equivalent to the 3174/3270 combination that can be used as a console and you can connect to it with a tn3270 client. This is not a cheap solution at > $20K list. The second variation is when you are using VM to host other OSes that need a 3270 as a console. If this is the case, find a copy of RXLDEV. RXLDEV allows you to use a virtual 3270 device for what the other OS would see as a actual console, as well as allowing you to programatically control the 3270 from a useful language (ie using PROP and REXX). You then take the real 3174 away from the other OS and use that for your more important VM console...8-) > At one time, I think that BlackBox had a device which would connect a real > 3270 terminal to an ASCII host. Basically it made a 3270 terminal look like > a VT-100. But I don't see such a thing on their web site anymore. There is also still the AEA feature for the 3174, which would at least remove the requirement for the 3270 terminal (attach a serial device and then you can use anything that can talk to a serial port and do VT100 emulation as the terminal instead of requiring a real 3270). A 7171 is also an similar option, and can usually be acquired very cheaply. Combine the 7171 or the AEA feature with an inexpensive serial terminal server or a old Cisco 2509, and you can clear out a lot of console real estate and still have the necessary functionality. > Just to be sure that I understand. You want to attach a real 3270 "green > screen" to your Linux/390 system, but without a 3174 control unit (or > equivalent)? If that is correct, I think this is impossible. The Linux-SNA code contains a 3270 terminal driver daemon, however you would have to write a driver for the coax card to support the additional line disciplines and a lot of the controller function -- there is also no channel card driver. It would be very difficult to make this work, but not impossible. It's probably not worth it -- the price of a 2074 is far less than the amount of work that this would require. -- db
