Nokia Alarm combination

cancel alarm, 7745 and 7743.

example:
** ALARM TRX -003 C74929B
(16095) 7745 CHANNEL FAILURE RATE ABOVE DEFINED THRESHOLD
02 01 00 00 00 00 00 00 00 00 00 100d

ZEOR:25:16095;

ZEOR: n° bcf: n° alarm;

Last number is very important,
if the alarm come back, you have a really problem.

If you have 100D = 100% failure

CHECK:

– ROSS feeder
– change TRX
– change copler

If it is not material, check channel plan frequencie.

good luck.

Alarm are logical in NOKIA.

If you have a real example, i can answer you.
I have 8 years experience in telecom field.

Failure sending …

appears when PCM link is cut (storm, rain(microwave) or breakdown)

it is stay in memories. You can cancelled by ZEOR or to do lock/unlocked of BCF (ZEFS)

I don’t why it is stay in memories. (BUG? i think)
the main alarm when PCM link is cut is: BTS O&M link failure + bcch missing

it is not important alarm but there is extract of NED:

Meaning
The system has blocked the radio time slot because the call
control has failed a number of times in the activation of
a traffic channel.
Supplementary information fields
1 Type of the channel whose TCH activation failed
The channel type can be “TCH” , “SDCCH” or “Packet Data TCH”.
The number value “0” indicates “TCH”, “1” indicates “SDCCH”
and “2” indicates “PDTCH” (Packet Data Traffic TCH).
Instructions
if the failure type is “PDTCH”, the alarm is cancelled automatically
by the system, when no more failure indications are observed

if the channel type is “TCH” or “SDCCH”, cancel the alarm with the MML
command EOR. Deblock the radio time slot by first aligning the TRX
in question with the command ERS and then removing the alignment
of the TRX
Cancelling
If the channel type is “TCH” or “SDCCH”, cancel the alarm with a command
before taking the steps described in the INSTRUCTIONS, if the alarm has
not been cancelled before. See instructions on base transceiver station
alarms handling.

Рatric, I know at you very much wide experience with equipment Nokia, please share also experience on elimination of failure: Rx levels differ too much between main and diversity antennas.
Thanks!

Rx levels differ too much between main and diversity antennas.

When you make a commisionning, the BTS make a check of ROSS of feeder.

So, if you have “RX level …” you have a problem on feeder or copler or antenna or LNA

On MMI, you have RSSI comparaison value, you can see difference between main and div.
“RX level…” appears when difference is superior at 3 or 4. I don’t remember.

Rahul – 23 Jul 2006

ALARM 7738
I don’t have a solution for this alarm.