High uplink interference on idle, check Nokia BTS supervision counters (ZEEO:SUP;?)for exact details of your setup. The Iband level exceeded and duration will be in there.
External interference will not disappear if you reduce the TX power of the cell (ZEUG, PMIN 30 PMAX 30) Internally generated noise (intermod) will disappear or reduce significantly with a power down (ZEUG) We have seen issues with poor antennas/diplexors when mixing 2G and 3G signals. Antennas were always given a clean bill of health..
2755 CARTRIDGE CLOCK FAILURE
3273 GPRS/EDGE TERRITORY FAILURE
7601 Difference between PCM and base station frequency reference.
Difference between PCM and BTS frequency reference
7651 BTS reference clock missing
7652 Difference between BTS master clock and reference frequency
7743 MEAN HOLDING TIME BELOW DEFINED THRESHOLD
7744 EXCESSIVE TCH INTERFERENCE
7745 CHANNEL FAILURE RATE ABOVE DEFINED THRESHOLD
7746 CH CONGESTION IN CELL ABOVE DEFINED THRESHOLD
7772 HSDPA CONFIGURATION FAILED
7782 HSUPA CONFIGURATION FAILED
7789 NO (E)GPRS TRANSACTIONS IN BTS