dyer@spdcc.COM (Steve Dyer) (09/12/90)
While I'm trying to get to the bottom of this 56kb line problem, I am
wondering just what a "carrier transition" is on a DDS circuit and how
I could get 2000 of them in the space of 2 seconds or so. I don't
see anything quite like a "carrier detect" on the V35 pinouts.
Is there some sort of pin flapping on a HDLC chip?
--
Steve Dyer
dyer@ursa-major.spdcc.com aka {ima,harvard,rayssd,linus,m2c}!spdcc!dyer
dyer@arktouros.mit.edu, dyer@hstbme.mit.eduleinwand@cisco.com (Allan Leinwand) (09/13/90)
In-Reply-To: <3986@ursa-major.SPDCC.COM>; from "Steve Dyer" at Sep 11, 90 10:19 pm X-Mailer: ELM [version 2.2 PL16 mips 1] >While I'm trying to get to the bottom of this 56kb line problem, I am >wondering just what a "carrier transition" is on a DDS circuit and how >I could get 2000 of them in the space of 2 seconds or so. A carrier transition is a when the carrier signal on a serial interface changes state. This can include going from down -> up and from up -> down. If you have gotten 2000 in a second or so, you most likely have a extremely bad data circuit. This can be caused by your CSU/DSU or the circuit itself. I would swap the CSU/DSU, the cable between it and the cisco and even tell your circuit provider about the problem. A good test may be to put your CSU/DSU in local loop and see if you can ping yourself out the bad interface. This can eliminate the CSU/DSU and the cable as part of the problem. -- Thanks, Allan Leinwand cisco Systems leinwand@cisco.com (415) 688-7653 "These are my friends. I made them myself." - Repo Man