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BigTex
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1st Post Wed May 14th, 2008 10:55 pm | |
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I've done this before so I know I know how to do it.
I'm trying to troubleshoot problems with a teleconference unit and Tandberg technical support has given me a command to send to the codec via hyperterminal connection. When I try to make the connection I get an "Unable to connect" message.
I have indicated connection using TCP/IP, and double checked that I have entered the IP address of the codec correctly. And I have tried using two different laptop computers. And I'm using a crossover cable.
Any ideas? What am I missing?
BTW, I'm bringing this to the board because I can't get anyone in our crackerjack I.T. department to help me.
Last edited on Wed May 14th, 2008 10:56 pm by BigTex
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Mark
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2nd Post Wed May 14th, 2008 11:06 pm | |
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What IP addresses are you using for the device and your laptop? The first three numbers of the IP should probably be the same.
The altboot hyperterminal that I use utilizes a serial cable with a null modem adapter, so I am probably not much help to you.
One other thing to consider is that some devices have embedded IP's for service functions such as this, different from the published IP. If this is the case, you would probably need to get the info from the manufacturer.
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Greg
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3rd Post Thu May 15th, 2008 02:26 am | |
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I'm confused, are you talking serial communications such as RS-232/RS-449 or are you doing network connections via IP? Serial doesn't do IP, unless they've reinvented the wheel in the last fifteen years since I did 232 communications. Disclaimer - every thing we did was wierd crap; custom code; nothing predictable - off the shelf items NEVER did what we needed. We wrote custom protocols and line handlers. Assuming since we're talking terminals, both are ASYNC rather that SYNC protocols. Also assuming serial...
Things to check;
1. off the shelf null cables work only if you're lucky
2. verify one device is DTE and one is DCE (straight cable) or dive into the null cable pungie pit
3. verify no handshaking; hardware handshaking; software handshaking ie xon/xoff is same for both devices
4. baud rates set the same
5. if hw handshaking, you may have to play games with DTR/DSR/CTS/RTS/CD jumpering them however needed to make things work. Can't say the exact config. I could go back thru my notes to see what TYPICALLY worked but still would not be a guarantee.
6. both are set the same wrt ASCII/EBCDIC
If no hw handshaking, do a jumper between TX/RD (pins 2/3 on DB-25) on the pc, type char using a term program and see if your typing is echoed on the screen.
BTW IMHO, RS-232 is the most non-standard industry standard there ever was!
Post if something more developes and I'll do whatever I can to help out.
Best of luck to you!
____________________
"The beauty of the second amendment is that it will not be needed until they try to take it." -- Thomas Jefferson
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BigTex
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4th Post Thu May 15th, 2008 03:12 am | |
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See, you are way over my head and thus my frustration that I'm getting no help from IT.
It is an ethernet connection using a crossover cable. I have hyerterminaled into a different video codec, so I know my cable is good.
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Greg
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5th Post Thu May 15th, 2008 11:25 am | |
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Sorry BT, I picked the wrong answer to my confusion about whether you were using network vs serial connections.
I'll give it some thought on my way into work and will post any ideas that come to me.
Good luck with it today.Last edited on Thu May 15th, 2008 11:28 am by Greg
____________________
"The beauty of the second amendment is that it will not be needed until they try to take it." -- Thomas Jefferson
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Raveon
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6th Post Fri May 16th, 2008 01:36 pm | |
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Can you ping the ip address you are trying to connect to?
Is your laptop set for the same subnet?
ip on laptop set static or dynamic?
If it is a crossover cable you are connecting directly to a unit I am sure and not trying to go through a switch?
Thats all I can think of right now but its kind of early
____________________
I've said that playing the blues is like having to be black twice. Stevie missed on both counts, but I never noticed.
- B.B. King
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houston
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7th Post Fri May 16th, 2008 02:13 pm | |
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Greg wrote: I'm confused, are you talking serial communications such as RS-232/RS-449 or are you doing network connections via IP? Serial doesn't do IP, unless they've reinvented the wheel in the last fifteen years since I did 232 communications. Disclaimer - every thing we did was wierd crap; custom code; nothing predictable - off the shelf items NEVER did what we needed. We wrote custom protocols and line handlers. Assuming since we're talking terminals, both are ASYNC rather that SYNC protocols. Also assuming serial...
Things to check;
1. off the shelf null cables work only if you're lucky
2. verify one device is DTE and one is DCE (straight cable) or dive into the null cable pungie pit
3. verify no handshaking; hardware handshaking; software handshaking ie xon/xoff is same for both devices
4. baud rates set the same
5. if hw handshaking, you may have to play games with DTR/DSR/CTS/RTS/CD jumpering them however needed to make things work. Can't say the exact config. I could go back thru my notes to see what TYPICALLY worked but still would not be a guarantee.
6. both are set the same wrt ASCII/EBCDIC
If no hw handshaking, do a jumper between TX/RD (pins 2/3 on DB-25) on the pc, type char using a term program and see if your typing is echoed on the screen.
BTW IMHO, RS-232 is the most non-standard industry standard there ever was!
Post if something more developes and I'll do whatever I can to help out.
Best of luck to you! That's why at 67 I am good frinds with my next door neighbor's kid. you know the one, he was just graduated from the 2nd grade.
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Sam
Renaissance Man
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8th Post Fri May 16th, 2008 06:56 pm | |
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BT: if you haven't gotten this figured out yet, send me the instructions you have via PM.
What IP address are you connecting to, and what IP address do you have on the laptop in question?
oh, and quit using hyperterminal. get putty: http://www.chiark.greenend.org.uk/~sgtatham/putty/download.html
Last edited on Fri May 16th, 2008 06:57 pm by Sam
____________________
That government is best which governs least. - Thomas Paine
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