Could it be a cisco problem?

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1 total messages Started by Curt Mosso (CGM) (805)961-4044 Tue, 03 Jul 1990 22:11

#447

Author: Curt Mosso (CGM) (805)961-4044
Date: Tue, 03 Jul 1990 22:11

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We have a serial connection which looks like:
 
      cisco       local              remote
    AGS with     DATATEL            DATATEL
       V.35 ----- V.35 ------56k---- V.35 ----- SUN
    interface    CSU/DSU            CSU/DSU
 
Briefly, the remote CSU/DSU will drop CTS although the CSU/DSU is switch set
to leave CTS always on. We have BERT tested the line, swapped CSU/DSU's, and
pretty much done all the testing you would expect. What we can't swap is the
cisco box. Has anyone seen an occurrence where a cisco gateway would cause a
CSU/DSU to drop CTS and leave it that way until the CSU/DSU has been reset?
 
You might ask why am I questioning the cisco gateway? We have seen the same
symptom once before. We have a two hop circuit. The first hop is on rf modems
on campus the second hop is on DATATEL CSU/DSU's off campus. We got a problem
report that a the remote CSU/DSU was dropping CTS. We could find no problems
on the CSU/DSU line, but when we found and fixed a problem on the rf modem
line, the CSU/DSU ceased to drop CTS. (If you have some idea why fixing the rf
line fixed the CSU/DSU I'd like to hear it.)
 
The cisco ASG is running GS Software Version 8.0(9). Show controller MCI
yields: MCI 1, controller type 2.1 microcode version 1.0.
 
Please respond to me at: com1curt@ucsbvm.bitnet When, if, we get a solution
I'll respond to the mailing list. Thank you. Curt

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