Hi folks, has anyone here used a Lantronix ETS-series or similar terminal server for LAT connections to RSX?  We're having a strange I have a Lantronix ETS8P running software version V3.6/5(010208) that I use to bridge various RS-232 serial devices to LAT services on OpenVMS, RSX-11, RSTS/E etc. I don't see any issues to any of my machines (and I have a few older images that can be MOP downline loaded to the Lantronix if you need them for V3.5/9, V3.6/1, V3.6/4)

On 10/25/25 23:46, Tony Nicholson wrote:   Hi Tony.  We use them much as you do, with local services to system consoles as well as for terminals and printers.  They've been working very well for us since we migrated to them recently from a set of DECservers.   I typed this up for Johnny a couple of hours ago so I'll just paste it here:   We have three Lantronix ETS-series terminal servers on the network; we just replaced four DECserver-300s with them.  They are performing great and give us some additional functionality that we wanted.   But we have hit one snag that is just...weird.  Either of the two RSX-11M-PLUS machines that we've tried (an 11/70 and an 11/53) both do this.  From one specific terminal server, when we connect to the LAT service, it gets a connection (and LCP shows it as connected) but there is no login prompt.  It is completely unresponsive.   The other two terminal servers work just fine, and other machines (several VAXen, two Linux machines, etc) can connect to that LAT service just fine, meaning we get the ">" immediately and can log in.   The configurations of the terminal servers are identical. The only difference is that the one with the problem is a 32-port unit and the two that work are 16-port units.   Connections to any other service from the affected terminal server work fine, including connections to RSTS/E on the very same PDP-11s. (most of our machines are set up with multiple system disks for different OSs)   The next time we work on this, possibly next week, we're going to do some packet captures.   Do you have any thoughts on this?            -Dave

On 10/26/25 03:31, Johnny Billquist wrote:   Packet dumps will take a few days but we will get them.      Node name = /LSSMFT/      Node identification = //      Service name = /LSSMFT/      Service identification = /LSSM RSX-11M-PLUSPDP-11/53/      Group codes 0      Multicast timer = 20          Maximum buffers = 3      Receive timeout = 30          Retransmit timer = 3      Terminals = 16      LAT Version = 5.1             LAT Protocol is active Here is one port where this happens, but it happens from all that we've tried, including telnetting into the Lantronix and connecting from there. Port 17: Username: mcguire             Physical Port 17 (Local Mode)    Char Size/Stop Bits:         8/1    Input Speed:                 9600    Flow Ctrl:              Xon/Xoff    Output Speed:                9600    Parity:                     None    Modem Control:               None    Access:                  Dynamic    Local Switch:                None    Backward:                   None    Port Name:                  VT330    Break Ctrl:                Local    Session Limit:                  4    Forward:                    None    Terminal Type:             Soft()    Autostart char(s):         --/--    Datasend char(s):           --/--    Save chars (AS/DS):    none/none    Timer:                     (none)    Preferred Services:        (Lat)                            (Telnet)    Authorized Groups : 0    (Current)  Groups : 0    Characteristics:  Autoprompt  Broadcast  Loss Notify  Verify                      Remote Conf  TelnetPad   I believe that would be SHOW SERVER.  This line-wrapped a lot.    ETS32PR Version V3.6/8(010807)         Uptime:            9 Days  16:39    Hardware Addr: 00-80-a3-24-98-7a       Name/Nodenum:           ETS-2/ 0    Ident String: Middle Console Cluster LAT  Circuit Timer (msec):         80     Password Limit:                3    Inactive Timer (min):           30     Console Port:                  1    Queue Limit:                    32     Retrans Limit:                25    Keepalive Timer (sec):          20     Session Limit:                 4    Multicast Timer (sec):          30     Node/Host Limits:          50/20 TCP/IP Address:         192.168.0.199     Subnet Mask:       255.255.255.0    Nameserver:          192.168.0.108     Backup Nameserver:  192.168.0.1    TCP/IP Gateway:       192.168.0.2     Backup Gateway:     192.168.0.37    Domain Name:         LSSMUSEUM.ORG     IP Time:                 Daytime                                           TCP Keepalives:          Enabled    DHCP Server:                  None     Lease Time:                 0:00    Prompt:                Local_%n%P>    Network Buffering:         4096    Groups: 0    Characteristics:  Announce  Broadcast  Lock    Incoming Logins:  LAT  Telnet   (No Passwords Required)   There's no "KNOWN" but here's "SHOW SERVICES": ASC20                Available       Welcome to LSSM SC40 Tops20, TOPS-20 Mon CL7830               Unavailable     MODCOMP Classic 7830 console CRAYEL               Available       Cray YMP-EL console DEC7000              Available       DEC7000 console DECNET               Available       Linux 3.5.0-17-generic ETS-1                Available       Front Terminal Cluster ETS-2                Available       Middle Console Cluster ETS-3                Available       Front Console Cluster ETS-5                Available       ETS Terminal Server G4490XT              Available       Genicom 4490XT HSC90                Available       HSC90 console IBMAEA1              Available       IBM3174 AEA 1 IBMAEA2              Available       IBM3174 AEA 2 IPSCFE               Available       Intel iPSC front end LA100                Available       LA100 printing terminal LSSMFT             1 Connected       LSSM RSX-11M-PLUS PDP-11/53 MICROVAXII           Available       MicroVAX-II console MODCOMP1             Available       MODCOMP interactive BAT001 MODCOMP2             Available       MODCOMP interactive BAT002 PARSYTECFE           Available       Parsytec Supercluster frontend PDP1105              Available       PDP-11/05 console PDP1134              Available       PDP-11/34 console PDP1144              Available       PDP-11/44 console PDP1153           2 Connected       PDP-11/53 console PDP1170              Available       PDP-11/70 console PDP11T55             Available       PDP-11/T55 console PLATTER              Available       Linux 6.8.0-86-generic SC40                 Available      Systems Concepts SC-40 console SGIO2K               Available       SGI Origin-2000 console SGIO3K               Available       SGI Origin-3000 console SPXG                 Available        Welcome to OpenVMS (TM) VAX Operating S SUN3280              Available       Sun-3/280 console SUN4690MP            Available       Sun-4/690MP console TANIA                Available       OpenVMS/IA64 TEK4014              Unavailable     Tektronix 4014 terminal VAX11750             Available       VAX-11/750 console VAX4705A             Available       VAX-4000/705A console VAX6400              Available       VAX-6400 console VAX7000              Available       VAX-7000 console VAX8250              Available       VAX-8250 console   And here's "SHOW SERVICE LSSMFT CHA": Service:  LSSMFT            Ident:  LSSM RSX-11M-PLUS PDP-11/53   Rating: 1   Enabled Groups: 0   They are substantially similar to the DECserver firmware.   LCP shows it as connected, as TT2:  "dev tt2:" says: TT2:    Not logged in     CLI   = MCR    BUF   = 80.    HFILL = 0     LINES = 24.    TERM  =unknown    OWNER = none     NOPRINTER_PORT    NOPASTHRU    NOSERIAL     LOWER    NOPRIV   NOHOLD    NOSLAVE    NOESC   NOCRT    NOFORM REMOTE     ECHO    NOVFILL   NOHHT    NOFDX    WRAP    NORPA    NOEBC TYPEAHEAD     NOCTRLC    NOAVO    NOANSI    NODEC    NOEDIT    NOREGIS NOSOFT    NOBLKMOD     HSYNC    BRO    NOABAUD    TTSYNC   This waits awhile and says "BRO -- Message failed to reach TT2:"            -Dave

By the way - you say that it's onlt that one server that you have problems with? Do the various commands on the Lantronix looks the same as for the other ones where you don't have the problems?   Johnny On 2025-10-26 22:00, Johnny Billquist wrote:

And also, does NCP SHO LIN QNA-0 COU show anything interesting? Johnny On 2025-10-26 22:07, Johnny Billquist wrote: > Oh. Another thing. Does LCP SHO COU on the RSX system show anything > interesting? > >   Johnny > > On 2025-10-26 22:02, Johnny Billquist wrote: >> By the way - you say that it's onlt that one server that you have >> problems with? Do the various commands on the Lantronix looks the >> same as for the other ones where you don't have the problems? >> >>    Johnny >> >> On 2025-10-26 22:00, Johnny Billquist wrote: >>> Hmm. One more thing then. >>> LCP SHO PORT when you are connected? >>> >>> But yeah, all looks good here. Might need to go and dissect LAT >>> packets on the ethernet. Gah! I hate that. It's quite a chore... >>> >>>    Johnny >>> >>> On 2025-10-26 19:35, Dave McGuire wrote: >>>> On 10/26/25 03:31, Johnny Billquist wrote: >>>>> Dave. Apart from packet dumps, could you get the following: >>>> >>>>    Packet dumps will take a few days but we will get them. >>>> >>>>> Output from LCP SHO CHA on the RSX system. >>>> >>>>       Node name = /LSSMFT/ >>>>       Node identification = // >>>>       Service name = /LSSMFT/ >>>>       Service identification = /LSSM RSX-11M-PLUSPDP-11/53/ >>>>       Group codes 0 >>>>       Multicast timer = 20          Maximum buffers = 3 >>>>       Receive timeout = 30          Retransmit timer = 3 >>>>       Terminals = 16 >>>>       LAT Version = 5.1             LAT Protocol is active >>>> >>>>> Output from SHOW PORT on the Lantronix >>>> >>>> Here is one port where this happens, but it happens from all that >>>> we've tried, including telnetting into the Lantronix and connecting >>>> from there. >>>> >>>> Port 17: Username: mcguire             Physical Port 17 (Local >>>> Mode) >>>> >>>>     Char Size/Stop Bits:         8/1    Input Speed: 9600 >>>>     Flow Ctrl:              Xon/Xoff    OutputSpeed: 9600 >>>>     Parity:                    None    Modem Control: >>>> None >>>> >>>>     Access:                  Dynamic    Local Switch: None >>>>     Backward:                   None    Port Name: VT330 >>>>     Break Ctrl:                Local   Session >>>> Limit:                  4 >>>>     Forward:                    None    Terminal Type: Soft() >>>>     Autostart char(s):         --/--    Datasend char(s): --/-- >>>>     Save chars (AS/DS):    none/none    Timer: (none) >>>> >>>>     Preferred Services:        (Lat) >>>>                             (Telnet) >>>> >>>>     Authorized Groups : 0 >>>>     (Current)  Groups : 0 >>>> >>>>     Characteristics:  Autoprompt  Broadcast  Loss Notify  Verify >>>>                       Remote Conf TelnetPad >>>> >>>>> Output from SHOW SYSTEM on Lantronix. >>>> >>>>    I believe that would be SHOW SERVER.  This line-wrapped a lot. >>>> >>>>     ETS32PR Version V3.6/8(010807)         Uptime:            9 >>>> Days 16:39 >>>>     Hardware Addr: 00-80-a3-24-98-7a       Name/Nodenum: ETS-2/ 0 >>>>     Ident String: Middle Console Cluster >>>> >>>> LAT  Circuit Timer (msec):         80     Password >>>> Limit:                3 >>>>     Inactive Timer (min):           30     Console >>>> Port:                  1 >>>>     Queue Limit:                   32     Retrans >>>> Limit:                25 >>>>     Keepalive Timer (sec):          20     Session >>>> Limit:                 4 >>>>     Multicast Timer (sec):          30     Node/Host Limits: 50/20 >>>> >>>> TCP/IP Address:         192.168.0.199     Subnet Mask: >>>> 255.255.255.0 >>>>     Nameserver:          192.168.0.108     Backup >>>> Nameserver:  192.168.0.1 >>>>     TCP/IP Gateway:       192.168.0.2     Backup Gateway: >>>> 192.168.0.37 >>>>     Domain Name:         LSSMUSEUM.ORG     IP Time: Daytime >>>>                                            TCP Keepalives: Enabled >>>>     DHCP Server:                  None     Lease Time: 0:00 >>>> >>>>     Prompt:                Local_%n%P>    Network >>>> Buffering:         4096 >>>>     Groups: 0 >>>> >>>>     Characteristics:  Announce  Broadcast Lock >>>>     Incoming Logins:  LAT  Telnet  (No Passwords Required) >>>> >>>>> Output from SHOW KNOWN SERVICES on Lantronix. >>>> >>>>    There's no "KNOWN" but here's "SHOW SERVICES": >>>> >>>> ASC20                Available      Welcome to LSSM SC40 Tops20, >>>> TOPS-20 Mon >>>> CL7830               Unavailable     MODCOMP Classic7830 console >>>> CRAYEL               Available       Cray YMP-EL console >>>> DEC7000              Available       DEC7000 console >>>> DECNET               Available       Linux3.5.0-17-generic >>>> ETS-1                Available      Front Terminal Cluster >>>> ETS-2                Available      Middle Console Cluster >>>> ETS-3                Available      Front Console Cluster >>>> ETS-5                Available      ETS Terminal Server >>>> G4490XT              Available       Genicom 4490XT >>>> HSC90                Available      HSC90 console >>>> IBMAEA1              Available       IBM3174 AEA1 >>>> IBMAEA2              Available       IBM3174 AEA2 >>>> IPSCFE               Available       InteliPSC front end >>>> LA100                Available      LA100 printing terminal >>>> LSSMFT             1 Connected       LSSM RSX-11M-PLUS PDP-11/53 >>>> MICROVAXII          Available       MicroVAX-II console >>>> MODCOMP1             Available       MODCOMP interactive BAT001 >>>> MODCOMP2             Available       MODCOMP interactive BAT002 >>>> PARSYTECFE          Available       Parsytec Supercluster frontend >>>> PDP1105              Available       PDP-11/05 console >>>> PDP1134              Available       PDP-11/34 console >>>> PDP1144              Available       PDP-11/44 console >>>> PDP1153           2 Connected       PDP-11/53 console >>>> PDP1170              Available       PDP-11/70 console >>>> PDP11T55             Available       PDP-11/T55 console >>>> PLATTER              Available       Linux 6.8.0-86-generic >>>> SC40                 Available      Systems Concepts SC-40 console >>>> SGIO2K               Available       SGI Origin-2000 console >>>> SGIO3K               Available       SGI Origin-3000 console >>>> SPXG                 Available        Welcome to OpenVMS (TM) VAX >>>> Operating S >>>> SUN3280              Available       Sun-3/280 console >>>> SUN4690MP            Available       Sun-4/690MP console >>>> TANIA                Available      OpenVMS/IA64 >>>> TEK4014              Unavailable     Tektronix 4014 terminal >>>> VAX11750             Available       VAX-11/750 console >>>> VAX4705A             Available       VAX-4000/705A console >>>> VAX6400              Available       VAX-6400 console >>>> VAX7000              Available       VAX-7000 console >>>> VAX8250              Available       VAX-8250 console >>>> >>>>    And here's "SHOW SERVICE LSSMFT CHA": >>>> >>>> Service:  LSSMFT            Ident:  LSSM RSX-11M-PLUS PDP-11/53 >>>>    Rating: 1 >>>>    Enabled Groups: 0 >>>> >>>>> And if the Lantronix use different commands, I hope you can figure >>>>> out what the equivalent commands would be. >>>> >>>>    They are substantially similar to the DECserver firmware. >>>> >>>>> And also, if connected (as in RSX shows the port as connected), >>>>> the output from DEV TTn: on RSX, where TTn: is whatever terminal >>>>> is indicated as connected. >>>> >>>>    LCP shows it as connected, as TT2:  "dev tt2:" says: >>>> >>>> TT2:    Not logged in >>>>      CLI   = MCR   BUF   = 80.    HFILL = 0 >>>>      LINES = 24.    TERM =unknown    OWNER = none >>>>      NOPRINTER_PORT    NOPASTHRU    NOSERIAL >>>>      LOWER    NOPRIV   NOHOLD    NOSLAVE    NOESC   NOCRT    NOFORM >>>> REMOTE >>>>      ECHO    NOVFILL   NOHHT    NOFDX    WRAP    NORPA    NOEBC >>>> TYPEAHEAD >>>>      NOCTRLC    NOAVO    NOANSI    NODEC    NOEDIT    NOREGIS >>>> NOSOFT    NOBLKMOD >>>>      HSYNC    BRO    NOABAUD    TTSYNC >>>> >>>> >>>>> You could also try a BRO TTn: FOOBAR, to see if output to the port >>>>> works. >>>> >>>>    This waits awhile and says "BRO -- Message failed to reach TT2:" >>>> >>>>             -Dave >>>> >>> >> >

And also, does NCP SHO LIN QNA-0 COU show anything interesting?   Johnny On 2025-10-26 22:07, Johnny Billquist wrote:

By the way - you say that it's onlt that one server that you have problems with? Do the various commands on the Lantronix looks the same as for the other ones where you don't have the problems?   Johnny On 2025-10-26 22:00, Johnny Billquist wrote:

Hmm. One more thing then. LCP SHO PORT when you are connected? But yeah, all looks good here. Might need to go and dissect LAT packets on the ethernet. Gah! I hate that. It's quite a chore...   Johnny On 2025-10-26 19:35, Dave McGuire wrote:

Hmm. One more thing then. LCP SHO PORT when you are connected? But yeah, all looks good here. Might need to go and dissect LAT packets on the ethernet. Gah! I hate that. It's quite a chore...   Johnny On 2025-10-26 19:35, Dave McGuire wrote:

On 10/25/25 23:46, Tony Nicholson wrote: Separately, what is this, if I may ask? I did several commercial designs with eZ80 microcontrollers (specifically eZ80F91) many years ago. I liked them a lot, but Zilog's toolchain wasn't very good, and the whole ecosystem was displaced (for my work anyway) by ARM (now ARM and RISC-V) with GCC. Much better overall but lacks that sexy "Z" on the package.. ;)

I have an RSX280 system as well, but I've not yet powered it up due to lack of time.

-Dave -- Dave McGuire, AK4HZ New Kensington, PA _______________________________________________ HECnet mailing list -- hecnet(a)lists.dfupdate.se To unsubscribe send an email to hecnet-leave(a)lists.dfupdate.se

On 10/26/25 01:40, Tony Nicholson wrote: ARM using This is very cool. I still have my old eZ80F91 eval board; is this setup documented somewhere such that I may replicate it?