We had a POP in a SWB town that would do this. It was on an Emerson Switch. The
PM3 was running 3.8.2c2. We found that we could reboot the PM3 or SWB could
reseat thier T cards, either way would fix the problem. The techs at SWB kept
telling us that they were seeing slips on the CT1s signal coming back to them
from our PM3. After months of working with SWB and being told by SWB to replace
our equipment and cabling because they could test fine to thier "Stupid Jack"
but not our PM3. Which we ultimately did. It was determined by a SWB tech that
SWBs "Stupid Jack" needed the regeneration dip switch set on.
This was done 2 months ago and we have been running clean CT1s since.
I have this situation on some CT1s in an Independant Telco town. PM3 running
3.8.2c2 on Siemen/Stromberg DCO. Still haven't figured it out. The PM3 is less
then 20' cable feet from the switch. The telco has CT1s wired to a regular RJ-45
jack. They are supposed to install "Stupid Jack" with regeneration dip switch on
to see if that fixes it.
I'll let the group know how it turns out
Brian Zimmerman
KeyCreations
brianz@kcisp.net
316.782.3131
Jay Hennigan wrote:
> Scenario:
>
> We have about 25 PM3s deployed, in a mix of PRI and CT-1 environments.
> Many of them have been service for just about as long as Livingston has
> been shipping PM3s. Running 3.9b22 at present, but I've observed this
> with previous ComOS releases as well.
>
> To date I've seen about five instances where the T-1 line interfaces
> will go into a mode where telco sees massive errors. Line levels look
> good, some errors seen on the receive end at the PM3.
>
> This condition persists until the PM3 is powered off and back up. Rebooting
> does not fix it. I have not verified if physically unplugging the T-1
> lines and reconnecting fixes it.
>
> It has happened infrequently enough as to not be the kind of thing one
> can easily open a trouble case with Lucent over, and isn't repeatable
> (at least not without months of waiting.)
>
> Anyone else ever experience this? What's the fix?
>
> --
> Jay Hennigan - Network Administration - jay@west.net
> NetLojix Communications, Inc. NASDAQ: NETX - http://www.netlojix.com/
> WestNet: Connecting you to the planet. 805 884-6323
>
> -
> To unsubscribe, email 'majordomo@livingston.com' with
> 'unsubscribe portmaster-users' in the body of the message.
> Searchable list archive: <URL:http://www.livingston.com/Tech/archive/>
-
To unsubscribe, email 'majordomo@livingston.com' with
'unsubscribe portmaster-users' in the body of the message.
Searchable list archive: <URL:http://www.livingston.com/Tech/archive/>