Thu, 20 Jan 1994 12:19:00 -0500

 


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We have some users who have hand held systems that would like to come access our mainframe via TCPIP. These hand held systems can only emulate VT220 devices. They are wireless (obviously, I hope) and communicate via RF to a RF receiver which communicates via Ethernet with IP. Since these hand held devices are line-mode only and most of our stuff is generally screen mode (ie; 3270), this gets ugly fast. Anybody have a similar scenario or thoughts on how to make this happen??? William L. Lee Westinghouse Savannah River Co. Phone: (803) 725-2678 SRS; Bldg 773-51A Internet: wllee@srs.gov Aiken, SC 29808 USA



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We have some users who have hand held systems that would like to come access our mainframe via TCPIP. These hand held systems can only emulate VT220 devices. They are wireless (obviously, I hope) and communicate via RF to a RF receiver which communicates via Ethernet with IP. Since these hand held devices are line-mode only and most of our stuff is generally screen mode (ie; 3270), this gets ugly fast. Anybody have a similar scenario or thoughts on how to make this happen??? William L. Lee Westinghouse Savannah River Co. Phone: (803) 725-2678 SRS; Bldg 773-51A Internet: wllee@srs.gov Aiken, SC 29808 USA



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"William L. Lee" <wllee@SRS.GOV> writes: >We have some users who have hand held systems that would like to come >access our mainframe via TCPIP. These hand held systems can only emulate >VT220 devices. They are wireless (obviously, I hope) and communicate via RF >to a RF receiver which communicates via Ethernet with IP. > >Since these hand held devices are line-mode only and most of our stuff is >generally screen mode (ie; 3270), this gets ugly fast. Anybody have a >similar scenario or thoughts on how to make this happen??? One thing you might consider is supporting line-mode terminals. VM/CMS does a bearable job of this. MVS/TSO is also usable. You don't say what kind of access to your mainframe they need, but full-screen is probably not a good idea unless they have a display area of at least 24x80. Many hand-held terminals don't. -- Bob Shair shair@uiuc.edu Open Systems Specialist SHAIR@UIUCVMD (bitnet) Champaign, Illinois 217/356-2684







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"William L. Lee" <wllee@SRS.GOV> writes: >We have some users who have hand held systems that would like to come >access our mainframe via TCPIP. These hand held systems can only emulate >VT220 devices. They are wireless (obviously, I hope) and communicate via RF >to a RF receiver which communicates via Ethernet with IP. > >Since these hand held devices are line-mode only and most of our stuff is >generally screen mode (ie; 3270), this gets ugly fast. Anybody have a >similar scenario or thoughts on how to make this happen??? One thing you might consider is supporting line-mode terminals. VM/CMS does a bearable job of this. MVS/TSO is also usable. You don't say what kind of access to your mainframe they need, but full-screen is probably not a good idea unless they have a display area of at least 24x80. Many hand-held terminals don't. -- Bob Shair shair@uiuc.edu Open Systems Specialist SHAIR@UIUCVMD (bitnet) Champaign, Illinois 217/356-2684



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On Wed, 19 Jan 1994 16:02:00 -0500 William L. Lee said: >We have some users who have hand held systems that would like to come >access our mainframe via TCPIP. These hand held systems can only emulate >VT220 devices. They are wireless (obviously, I hope) and communicate via RF >to a RF receiver which communicates via Ethernet with IP. > >Since these hand held devices are line-mode only and most of our stuff is >generally screen mode (ie; 3270), this gets ugly fast. Anybody have a >similar scenario or thoughts on how to make this happen??? > > >William L. Lee Westinghouse Savannah River Co. >Phone: (803) 725-2678 SRS; Bldg 773-51A >Internet: wllee@srs.gov Aiken, SC 29808 USA Most tcpip packages have a 3270 emulator as part of the package. NCSA and FTP's PCTCP come to mind. If they are not limited as to the tcpip package they use, I would suggest switching them to a tool that supports 3270 emulation. Bruce ------ Bruce Posey | bitnet: posey@ohstphrm.bitnet Ohio State University | internet: posey@ohstphrm.pharmacy.ohio-state.edu College of Pharmacy | phone: (614) 292-3588 Columbus, Ohio | "Better living through electronic mail."







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On Wed, 19 Jan 1994 16:02:00 -0500 William L. Lee said: >We have some users who have hand held systems that would like to come >access our mainframe via TCPIP. These hand held systems can only emulate >VT220 devices. They are wireless (obviously, I hope) and communicate via RF >to a RF receiver which communicates via Ethernet with IP. > >Since these hand held devices are line-mode only and most of our stuff is >generally screen mode (ie; 3270), this gets ugly fast. Anybody have a >similar scenario or thoughts on how to make this happen??? > > >William L. Lee Westinghouse Savannah River Co. >Phone: (803) 725-2678 SRS; Bldg 773-51A >Internet: wllee@srs.gov Aiken, SC 29808 USA Most tcpip packages have a 3270 emulator as part of the package. NCSA and FTP's PCTCP come to mind. If they are not limited as to the tcpip package they use, I would suggest switching them to a tool that supports 3270 emulation. Bruce ------ Bruce Posey | bitnet: posey@ohstphrm.bitnet Ohio State University | internet: posey@ohstphrm.pharmacy.ohio-state.edu College of Pharmacy | phone: (614) 292-3588 Columbus, Ohio | "Better living through electronic mail."



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Thanks for the replies...we are following up a possible CISCO router solution and I'm gonna check into TAGIBM. For the record here some of the info I left out in haste or didn't know at the time I wrote the note: -These hand helds made by LXE corp. Apparently they only 'do' VT220. Loading on a different emulator isn't possible...and the vendor (LXE) insists that IBM should support VT220 or at least state they don't support it...yeah buddy! Turns out most shops use their base station with SNA, looks like controller to VTAM and the handhelds like LUs. Apparently they don't have anybody trying to make TCPIP to the mainframe work... -Yes the RF piece is irrevelant, but wanted to add it for completeness and possibly subsequent TCPIP archive trolling. -Linemode is NG as the application they will be using is a CICS one. -The displays on these devices are something like 8x40, but have function keys to 'move the window' that you're viewing...so to see a whole 3270 screen you have to look at 6 pieces and try to remember the pertainant info...*yuck*... I didn't buy it...just trying to make it work. -7171 is out...non TCPIP able. -We thought about gateways, but weren't sure what these things were and adding a gateway add another element to support/break/variable... Thanks for the contributions. William L. Lee Westinghouse Savannah River Co. Phone: (803) 725-2678 SRS; Bldg 773-51A Internet: wllee@srs.gov Aiken, SC 29808 USA







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Thanks for the replies...we are following up a possible CISCO router solution and I'm gonna check into TAGIBM. For the record here some of the info I left out in haste or didn't know at the time I wrote the note: -These hand helds made by LXE corp. Apparently they only 'do' VT220. Loading on a different emulator isn't possible...and the vendor (LXE) insists that IBM should support VT220 or at least state they don't support it...yeah buddy! Turns out most shops use their base station with SNA, looks like controller to VTAM and the handhelds like LUs. Apparently they don't have anybody trying to make TCPIP to the mainframe work... -Yes the RF piece is irrevelant, but wanted to add it for completeness and possibly subsequent TCPIP archive trolling. -Linemode is NG as the application they will be using is a CICS one. -The displays on these devices are something like 8x40, but have function keys to 'move the window' that you're viewing...so to see a whole 3270 screen you have to look at 6 pieces and try to remember the pertainant info...*yuck*... I didn't buy it...just trying to make it work. -7171 is out...non TCPIP able. -We thought about gateways, but weren't sure what these things were and adding a gateway add another element to support/break/variable... Thanks for the contributions. William L. Lee Westinghouse Savannah River Co. Phone: (803) 725-2678 SRS; Bldg 773-51A Internet: wllee@srs.gov Aiken, SC 29808 USA


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