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Resolve case Id: NA04860989

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Contents

• Alarm Definition as per N D

• !easons for Alarm

• "rou#les$ootin%

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Alarm Definition as per NED :

•7745 C ANNE! "AI!#RE RA$E A%&'E DE"INED $ RE( &!D

)eanin* :

"$e rate of calls terminatin% in failure on a c$annel is a#o'e t$e t$res$old 'alue set #y

t$e operator( "$e alarm is used to super'ise t$e functionin% of traffic and si%nalin%c$annels) and to detect t$e possi#le faulty c$annels(

*arameters) wit$ t$eir default 'alues) affectin% t$e alarm+

, N+"C-F! . "C- failure rate 20 SC-F! . SDCC- failure rate 30 *!DCF! . len%t$ of super'ision period 40 minCS . c$annel sei5ure t$res$old 'alue 10S67N" . super'ision start time 03800 67N" . super'ision end time 13800

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Supplementary information fields +

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"$is alarm is %enerated if t$e percenta%e of a#normally ended transactions on SDCC- or "C-c$annels durin% a measurement period is %reater t$an or e;ual to t$e alarm t$res$old defined #yt$e operator( -owe'er) t$e alarm is not %enerated a%ain for a c$annel wit$ an already acti'ealarm( "$ere are separate alarm t$res$olds for t$e SDCC- and t$e "C- failure rates(

w$en a SDCC-/"C- is released wit$ t$e followin% error causes) t$e lost call counter isau%mented(

7ot$ SDCC-s and "C-s) release #ecause of+• a c$annel acti'ation failure• user actions• a 7"S failure• an <A*D failure• a 7SC si%nallin% unit 7CS= reset• A#is pro#lems• A interface pro#lems• a radio failure• a radio failure on an old c$annel durin% $ando'er • a radio failure on a new c$annel durin% $ando'er

->? A<A!6 @@9: ?orks

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"C-s only) release #ecause of+• a transcoder failure• a transcoder failure on an old c$annel durin% $ando'er • a transcoder failure on a new c$annel durin% $ando'er

"$e counter for lost calls durin% a measurement period is cleared at t$e end of eac$measurement period(

"$e filterin% of t$e alarm %eneration is ac$ie'ed wit$ a t$res$old 'alue defined #y t$eoperator for t$e num#er of c$annel sei5ure re;uests( "$e num#er of c$annel sei5ure

re;uests durin% a measurement period must #e %reater t$an or e;ual to t$e t$res$old'alue for t$e alarm to #e %enerated ( Alt$ou%$ t$e C$annel failure rate e ceededSDCC-) "C- super'ision is c$annel8specific) only one alarm per "!B and c$annel

type is %enerated durin% one measurement period( n t$e alarm printout) morespecified information is %i'en of t$e c$annel wit$ t$e %reatest failure rate(

"$e system cancels t$e alarm at t$e end of t$e first suc$ measurement period durin%w$ic$ conditions for alarm %eneration are no lon%er met or in connection wit$ user slockin% and unlockin% commands (

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Reasons for Alarm• ard+are Iss,es:

– 7"S unit $ardware failures "!B) 772F)?C A)DE A

– Crossed feeder ca#les(

– 7ad S6A ca#le ) #ad feeder ;uality or t$eir improper connecti'ity(

– !SS 'alues on t$e main and di'ersity pat$s are differin% a lot(

• R" Iss,es:

– f !F $oppin% is #ein% used and 7CC- Fre;uency added to 6A list(

– Some se%ments in t$e network usin% same 7CC- Fre;uency

– Ealue of "SC parameter is not same as 7CC 'alue

– -i%$ nterference caused in t$e network(

• %(C-Net+or. Iss,es: – <A*D messa%e distri#ution pro#lem due to unused floatin% "!B si%nalin% links on t$e7CS= concerned

– "elecom links o'erloadin% t$e 7CS=

– !epeated "ransmission Failures

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$ro,/les ootin*

Adobe Acrobat

Document

"$e "rou#les$ootin% document uses t$e =ltra site nomenclatures for e(%( ?C A(

"$e document is e;ually applica#le to ot$er 7"S types(

• For 7SC/Network ssues refer t$e followin%s+

• "$ere are a num#er of 7SC alarms and counters w$ic$ may indicate t$at 7SCload is a pro#lem(

ncrease in counters &00:) &0&3) &0&G) &090) &091) :0042@DA" files are needed to see t$ese counters

Alarms 1019) 21&&) 29@3) 2@20) &149 Alarms 2GG& H @@9: may also #e caused #y 7SC o'erload(C$eck t$e "ransmission <inks for any Iitters) slips and 7 !(