[nsp] telnet port for aux port

[Mark Kent]

What is it that controls the port one needs to telnet to
in order to "connect" to the AUX port?

I've been using port 2001 for years on various router models and
recently hit failures on a new 2621 and a couple of 1750 running 12.2.
Finally, I clued into using a port scanner and discovered that on the
cisco2621 the port is 2065 and on the 1750s the port is 2005.

What gives?  What happened to good-old port 2001?

Thanks,
-mark