Dropped calls - 2000IPS retrofit 1

[grh959]

2000 IVS to IPS retrofit - I have 4 stations that are dropping calls -inbound calls on PRI. PRi is stable no alarms. 4 stations that are having the trouble are in different PIM's (3 PIM config).

I have changed station cables, bus cards, bus cables, station cards, moved stations to different LEN. This has redundant CPU and have switched that over as well.

Any ideas?

 

[Billz66]

I have always found that when strange things are happening that to shift the offset sometimes works.

- eg dterm on len 00020 : F300
- note all relevant programming 1201,1202,1204,1212,1213,160,170,180,E600,E601,E602,9000,9001
then in CM 14>00020:F300-CCC.
Then go way uphigh to an unassigned len and assign an unused number
CM 14>03000:NONE-F3AA.
Then go back to the original len and put all the data back in.

Then go back to the high len and delete the dummy number

This has cleared some strange things for me in the past when nothing else would.
if you just ccc the original len and reprogram straight back onto it there is some data that gets stored in a scratch area that gets written back.

 

[OzzieGeorge]

A trick that has worked for me in the past is to set up a call on the problem station/s (it must be a valid call, not just going off hook). Then do a forced release on the station (takes about 30 seconds for it to happen after the command has been executed so don't hang up till the call is dropped). This seems to set everything back to a baseline setting (my interpretation). The only problem is the command is not in the command manual and my notes are about three an a half hours jet flight away! If you want to search, it is in the maintenance manual or you can wait till I get home on Sunday.

 

[OzzieGeorge]

Found the command! EB0 is for forced release of a trunk. But of interest here is EB2 de station number de CCC exe

 

[grh959]

I tried the EB2 command today and was unable to force a disconnect. Thanks for the idea Ozzie!

I will try b66's idea next.....

 

[grh959]

B66's solution worked! Thanks for the hints!