HECnet

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15556 discussions

Sync serial bridging over Ethernet, was Re: [HECnet] Multi-floor household (DECnet) routing help needed

by ian＠platinum.net

I'm not working on anything now - I just came up with the idea. I did some Googling, and there seems to be commercial units, all around $1K per end (async is much cheaper). Microcontrollers and digital electronics is another one of my hobbies. Async serial is simple for a microcontroller to handle. I've never actually looked to see if there's any synchronous libraries out there. Wrapping the data in UDP is simple. The HDLC layer could deal with error detection/correction. The problem is finding surplus time to embark on this. Maybe a few of us could collaborate on it? Ian On 2013-01-17, at 10:07 PM, Gregg Levine <gregg.drwho8 at gmail.com> wrote: On Fri, Jan 18, 2013 at 12:53 AM, Dave McGuire <mcguire at neurotica.com> wrote: On 01/18/2013 12:41 AM, Ian McLaughlin wrote: I wonder if there'd be any interest in cobbling up a little microcontroller circuit that could convert synchronous serial to Ethernet. We could use these to emulate leased lines on equipment that doesn't even have Ethernet boards. YES. Are you working with that sort of stuff? I ask because I am and could probably do it. -Dave -- Dave McGuire, AK4HZ New Kensington, PA Hello! That is a truly amazing idea. What sort of adapters are the both of you thinking of? ----- Gregg C Levine gregg.drwho8 at gmail.com "This signature fought the Time Wars, time and again." --- Filter service subscribers can train this email as spam or not-spam here: http://my.email-as.net/spamham/cgi-bin/learn.pl?messageid=58228A76613511E2A…

12 years, 3 months

Sync serial bridging over Ethernet, was Re: [HECnet] Multi-floor household (DECnet) routing help needed

by gregg.drwho8＠gmail.com

On Fri, Jan 18, 2013 at 12:53 AM, Dave McGuire <mcguire at neurotica.com> wrote: On 01/18/2013 12:41 AM, Ian McLaughlin wrote: I wonder if there'd be any interest in cobbling up a little microcontroller circuit that could convert synchronous serial to Ethernet. We could use these to emulate leased lines on equipment that doesn't even have Ethernet boards. YES. Are you working with that sort of stuff? I ask because I am and could probably do it. -Dave -- Dave McGuire, AK4HZ New Kensington, PA Hello! That is a truly amazing idea. What sort of adapters are the both of you thinking of? ----- Gregg C Levine gregg.drwho8 at gmail.com "This signature fought the Time Wars, time and again."

12 years, 3 months

Multi-floor household (DECnet) routing help needed

by b4＠gewt.net

On 18 Jan 2013, at 00:55, Dave McGuire <mcguire at neurotica.com> wrote: On 01/18/2013 12:33 AM, Cory Smelosky wrote: I wonder how many telcos will still give you a plain leased line over POTS... Most all of them, if not ALL of them. Leased lines, however, aren't POTS. POTS refers to single analog phone lines, which leased lines (56K DDS, T1, T3, etc) are not. Thanks for the clarification, I often confuse some telecom stuff. ;) Just a nit. ;) -Dave -- Dave McGuire, AK4HZ New Kensington, PA

12 years, 3 months

Multi-floor household (DECnet) routing help needed

by mcguire＠neurotica.com

On 01/18/2013 12:33 AM, Cory Smelosky wrote: I wonder how many telcos will still give you a plain leased line over POTS... Most all of them, if not ALL of them. Leased lines, however, aren't POTS. POTS refers to single analog phone lines, which leased lines (56K DDS, T1, T3, etc) are not. Just a nit. -Dave -- Dave McGuire, AK4HZ New Kensington, PA

12 years, 3 months

Sync serial bridging over Ethernet, was Re: [HECnet] Multi-floor household (DECnet) routing help needed

by mcguire＠neurotica.com

On 01/18/2013 12:41 AM, Ian McLaughlin wrote: I wonder if there'd be any interest in cobbling up a little microcontroller circuit that could convert synchronous serial to Ethernet. We could use these to emulate leased lines on equipment that doesn't even have Ethernet boards. YES. Are you working with that sort of stuff? I ask because I am and could probably do it. -Dave -- Dave McGuire, AK4HZ New Kensington, PA

12 years, 3 months

Multi-floor household (DECnet) routing help needed

by mcguire＠neurotica.com

On 01/18/2013 12:41 AM, Ian McLaughlin wrote: With some of the speeds I'm getting through several people's home DSL internet in and back out again to get from here to Europe, I'd say the actual speeds I'm getting are pretty close to the 'good old days' :) Your first stop is here I think, for at least one of your links, and I have a fair bit of bandwidth here. -Dave -- Dave McGuire, AK4HZ New Kensington, PA

12 years, 3 months

Multi-floor household (DECnet) routing help needed

by b4＠gewt.net

On 18 Jan 2013, at 00:41, Ian McLaughlin <ian at platinum.net> wrote: On 2013-01-17, at 9:33 PM, Cory Smelosky <b4 at gewt.net> wrote: Also, HECnet needs some leased lines between locations for maximum authenticity. Along with period-accurate modems. ;) I wonder how many telcos will still give you a plain leased line over POTS... With some of the speeds I'm getting through several people's home DSL internet in and back out again to get from here to Europe, I'd say the actual speeds I'm getting are pretty close to the 'good old days' :) ;) I wonder if there'd be any interest in cobbling up a little microcontroller circuit that could convert synchronous serial to Ethernet. We could use these to emulate leased lines on equipment that doesn't even have Ethernet boards. I'd be very interested, unfortunately I lack the necessary knowledge. :( Although, I also say we need HECnet radio balloons and similar, so my ideas are a bit absurd. ;) Ian

12 years, 3 months

Multi-floor household (DECnet) routing help needed

by ian＠platinum.net

On 2013-01-17, at 9:33 PM, Cory Smelosky <b4 at gewt.net> wrote: Also, HECnet needs some leased lines between locations for maximum authenticity. Along with period-accurate modems. ;) I wonder how many telcos will still give you a plain leased line over POTS... With some of the speeds I'm getting through several people's home DSL internet in and back out again to get from here to Europe, I'd say the actual speeds I'm getting are pretty close to the 'good old days' :) I wonder if there'd be any interest in cobbling up a little microcontroller circuit that could convert synchronous serial to Ethernet. We could use these to emulate leased lines on equipment that doesn't even have Ethernet boards. Ian

12 years, 3 months

Multi-floor household (DECnet) routing help needed

by b4＠gewt.net

On 18 Jan 2013, at 00:23, Ian McLaughlin <ian at platinum.net> wrote: On 2013-01-17, at 9:19 PM, Cory Smelosky <b4 at gewt.net> wrote: What's the latency like? [root at zork ~]# ping 192.168.42.1 -c 10 PING 192.168.42.1 (192.168.42.1) 56(84) bytes of data. 64 bytes from 192.168.42.1: icmp_seq=1 ttl=255 time=4.45 ms 64 bytes from 192.168.42.1: icmp_seq=2 ttl=255 time=3.40 ms 64 bytes from 192.168.42.1: icmp_seq=3 ttl=255 time=4.40 ms 64 bytes from 192.168.42.1: icmp_seq=4 ttl=255 time=3.30 ms 64 bytes from 192.168.42.1: icmp_seq=5 ttl=255 time=4.46 ms 64 bytes from 192.168.42.1: icmp_seq=6 ttl=255 time=2.87 ms 64 bytes from 192.168.42.1: icmp_seq=7 ttl=255 time=8.04 ms 64 bytes from 192.168.42.1: icmp_seq=8 ttl=255 time=3.42 ms 64 bytes from 192.168.42.1: icmp_seq=9 ttl=255 time=3.38 ms 64 bytes from 192.168.42.1: icmp_seq=10 ttl=255 time=4.52 ms --- 192.168.42.1 ping statistics --- 10 packets transmitted, 10 received, 0% packet loss, time 9004ms rtt min/avg/max/mdev = 2.878/4.229/8.042/1.395 ms Oooooh. Not bad at all. Not too much jitter and doesn't seem lossy. This is at the same time as I'm saturating the 10Mbps part of the network with a local FTP of a 22Gb file that I need to move over to my Alpha machine. 22GB at 10Mbps? That could take you a while. ;) Great stress test though. Also, HECnet needs some leased lines between locations for maximum authenticity. Along with period-accurate modems. ;) I wonder how many telcos will still give you a plain leased line over POTS... I am very happy. Ian

12 years, 3 months

Multi-floor household (DECnet) routing help needed

by ian＠platinum.net

On 2013-01-17, at 9:19 PM, Cory Smelosky <b4 at gewt.net> wrote: What's the latency like? [root at zork ~]# ping 192.168.42.1 -c 10 PING 192.168.42.1 (192.168.42.1) 56(84) bytes of data. 64 bytes from 192.168.42.1: icmp_seq=1 ttl=255 time=4.45 ms 64 bytes from 192.168.42.1: icmp_seq=2 ttl=255 time=3.40 ms 64 bytes from 192.168.42.1: icmp_seq=3 ttl=255 time=4.40 ms 64 bytes from 192.168.42.1: icmp_seq=4 ttl=255 time=3.30 ms 64 bytes from 192.168.42.1: icmp_seq=5 ttl=255 time=4.46 ms 64 bytes from 192.168.42.1: icmp_seq=6 ttl=255 time=2.87 ms 64 bytes from 192.168.42.1: icmp_seq=7 ttl=255 time=8.04 ms 64 bytes from 192.168.42.1: icmp_seq=8 ttl=255 time=3.42 ms 64 bytes from 192.168.42.1: icmp_seq=9 ttl=255 time=3.38 ms 64 bytes from 192.168.42.1: icmp_seq=10 ttl=255 time=4.52 ms --- 192.168.42.1 ping statistics --- 10 packets transmitted, 10 received, 0% packet loss, time 9004ms rtt min/avg/max/mdev = 2.878/4.229/8.042/1.395 ms This is at the same time as I'm saturating the 10Mbps part of the network with a local FTP of a 22Gb file that I need to move over to my Alpha machine. I am very happy. Ian

12 years, 3 months

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