System information

Troubleshooting Booting Problems
Book Title
3-56
Possible Problem Solution
Flow control configured on the
terminal conflicts with the
EIA/TIA-232 control signals
supported by the access server
console port (RJ-45 to DB-25)
Step 1 Check whether flow control is configured on your terminal.
Step 2 Disable all flow control on the terminal. With flow control enabled,
the terminal will wait indefinitely for a CTS
1
signal because the
RJ-45 console port on the access server does not assert CTS.
For information on how to check for and disable flow control on your
specific terminal, consult the documentation provided by your
terminal manufacturer.
Step 3 Alternatively, you can “strap,” or short, CTS high by providing the
proper voltage on the CTS signal lead to make the signal active. Find
an unused signal that is known to be active and strap CTS to it. The
terminal sees CTS being asserted (indicating that the access server is
ready to receive data) and allows input to be entered.
Step 4 On an already configured access server, another solution is to connect
your terminal to the auxiliary port of the access server. The auxiliary
port, unlike the console port, asserts CTS, and the terminal will
therefore allow input. However, on a new access server with no
configuration, this is not an alternative because the bootup banners
and Setup routine are seen only on the console port.
1 CTS = clear-to-send
Hardware problem Step 1 Check all hardware—including cabling (broken wires), adapters
(loose pins), access server ports, and the terminal itself—for damage.
Step 2 Replace any hardware that is damaged or excessively worn. For more
information, refer to the hardware troubleshooting information
earlier in this chapter.