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Old 04-04-2018, 12:39 PM
mac&cheese mac&cheese is offline
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Exclamation MAC CRT Break Command

I am running CRT version 8.1 on a Mac OS Sierra and unable to get break command working when I configure key map. Can someone tell me if break command is supported with Mac using a USB serial cable.

I suspect it is supported but I must be missing a step.

Just want to add this will be used with a Cisco router to enter ROM mode.

Thank you in advance !
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Old 04-04-2018, 01:00 PM
ekoranyi ekoranyi is offline
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Posts: 654
Hi mac&cheese,
  • Individual USB->Serial adapters may not support signaling a break condition. Check with the manufacturer of your converter for specifics. If your USB to Serial device supports sending a Break signal then the following info applies.
  • Edit > Send Break is how you generate a break signal with Telnet/Serial
  • For troubleshooting, choose Trace Options from the File menu *before* you connect to the serial port in SecureCRT.
  • Trace Options will show the following when SecureCRT is signaling a break condition:
    [SERIAL-TRACE] : Send break, Duration=100
  • You may need to adjust the length of the serial break length in order to trigger a break condition. This can be done in Session Options, Connection > Serial category, increase the value of the Serial break length setting.
  • If all else fails, Cisco documents a way to simulate a serial break length. For details, visit the following Cisco web resource as one example: http://www.cisco.com/c/en/us/support.../12818-61.html

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Old 04-04-2018, 01:29 PM
mac&cheese mac&cheese is offline
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Thanks Eric, good info. I have follow your steps already with no luck.

I guess next step would be to purchase a new serial cable thats supports break command to see if that does the trick.

appreciate your help
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break command

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