I am having CISCO ISDN TelePresence Link. I am connecting it through COM port I changed the serial port settings as per recommended settings shown in User Manual in my laptop but still console is not coming. Please help...
Just use a standard straight through 9-pin serial cable rather than the Cisco console cable and adaptor you have as you can't be sure of the pinout of the RJ45-DB9 adaptor you've got. It's likely there's a crossover or some other pinout difference in those adaptors and connectors, especially if you're having to use a gender changer.
If you're using a USB->Serial adaptor, try connecting that directly to the COM port on the ISDN link rather than using a cable between them (or use a USB extension cable on the USB end if you need additional length).
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Wayne -- Please remember to mark helpful responses and to set your question as answered if appropriate.