🚀 go-pugleaf

This isn't specifically Cisco-related, but I thought that the readers
here might be familiar with this kind of scenario.

I've just installed a 56kb DDS circuit with DSU/CSUs on each end and a
Cisco CGS/2 on my end (there's a larger Cisco on the other end.)  The
line itself came up with only a little difficulty, but I am having
regular trouble with the serial line staying up for any length of time
without the Cisco dropping DTR and resetting the line.  The number of
carrier transitions reported by "show interface" is almost mindboggling--
after 10 minutes from powerup, it reports 817 carrier transitions and
8 interface resets.  Naturally, this is wreaking havoc with applications
getting ICMP unreachables and prematurely closing.

I had the telco run loopback tests on both ends of the line for as long
as 15 minutes and they reported that it looked as clean as a whistle,
with no data or clocking errors.

I'm really at a loss for where to look next.  Anyone have any pointers?

-- 
Steve Dyer
dyer@ursa-major.spdcc.com aka {ima,harvard,rayssd,linus,m2c}!spdcc!dyer
dyer@arktouros.mit.edu, dyer@hstbme.mit.edu