- This topic has 22 replies, 1 voice, and was last updated 2 years, 11 months ago by
Indranil Chaulya.
-
AuthorPosts
-
manoj
GuestCan somebody help me with troubleshooting of Nokia BTS wrt to the combination of alarms dispalyed for that sector.
For instance 7745 + 7743 suggest problem in feeder link
patrick
Guestcancel 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 100dZEOR: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 coplerIf it is not material, check channel plan frequencie.
good luck.
Manoj
GuestPatrick thanks for the reply,but it is not just the combination of 7745 and 7743,I am intersted in.I would appreciate if you could provide the full list of all possible combination of alarms
patrick
GuestAlarm are logical in NOKIA.
If you have a real example, i can answer you.
I have 8 years experience in telecom field.Rahul
GuestHI PATRICK
can u help me with this alarm
7723 FAILURE IN SENDING SYSTEM INFORMATION TO BTS SITE
0C 13028d
thanxpatrick
GuestFailure 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 missingun7fda
GuestHI PATRICK
Many thanks for answers.
For me it was instructive.
At me not wide experience in the field of a telecommunications. I only study.
Patrick help please algorithm of troubleshooting and elimination at failure:
7725 TRAFFIC CHANNEL ACTIVATION FAILURE 02
THANKS.PATRICK
Guestit 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 observedif 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.un7fda
GuestHI PATRICK
In this case the type of failure 02 that is “PDTCH” (Packet Data Traffic TCH) is clearly, from NED is not clear as to find the reason which causes the given failure and her{it} to remove.
Thanks.un7fda
GuestРatric, 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!Rahul
GuestHi patrick
thanx
can u clearify this alarm
” Bts with no transaction” This alarm come when the Sector in not Taking Calls
How can we resolve the problemPatrick
GuestRx 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.un7fda
GuestHI PATRICK
Many thanks.patrick
GuestRahul – 23 Jul 2006
ALARM 7738
I don’t have a solution for this alarm.sunggus
GuestHi,
Alarm 7738: BTS WITH NO TRANSACTIONS, could be occur by two reasons:
1. No incoming call, i.e due to DVxx is broken.
2. The cell facing the very rural area, so nobody make call.The alarm itself will be generated if in one hour continuously detected no call, and the alarm will be cancelled if after one hour detected call has made.
If such alarm occurs, just replace the DVxx or made call in that cell. -
AuthorPosts