Lucent Technologies DEFINITY® Enterprise Communication Server Release 8.2 Reports Guide

							DEFINITY Enterprise Communication Server Release 8.2
Reports Guide  555-233-505  Issue 1
April 2000
Traffic Data Analysis 
3-169 Trunk Group Performance Report 
3
% Outgoing 
Blocking or 
% ATBPerc ent Outg oing  Bloc king  or Perc ent All Trunks Busy. A 
g rap hic al rep resentation eq uivalent to the numeric al value of 
c alls offered  b ut not c arried . For two-way and  outg oing  trunk 
g roup s, peak hour b loc king  is the larg est % Outgoing 
Bloc king. For inc oming  trunks, p eak hour is the larg est % 
ATB. Sinc e % Outg oing  Bloc king  is meaning less for 
inc oming  trunks, it is displayed  as *
 in that c olumn. For trunk 
g roup s without a q ueue, c alls not c arried  are those c alls that 
arrive when all trunks are busy. For trunk groups with a 
q ueue, c alls not c arried  are c alls that arrive when all trunks 
are b usy and  the q ueue is full (Queue Overflow) and  c alls 
removed  from q ueue b efore b eing  c arried  (Queue 
Ab andoned ).
Suggested Actions:
 If a trunk g roup  has a hig her p erc ent of 
b loc king  than d esired, d etermine the exac t reason that the 
trunk group is blocking calls.
1. The Total Calls field  ind ic ates the c alling  volume. If 
exc essive bloc king  is b ec ause of c alling  volume alone, 
c onsid er the p ossib ility of ad d ing  more members to the 
trunk g roup .
2. If exc essive b loc king is not b ec ause of c alling  volume, 
the reason mig ht b e b ec ause trunks are in the 
maintenanc e b usy state. You c an use the Trunk Outag e 
Rep ort (d esc rib ed  next) to identify those trunks 
d etermined to b e out of servic e. Furthermore, and  as 
required, use the ACA feature to monitor any trunk group 
still experienc ing  unexp lained  exc essive bloc kage.
3. For id entified p rob lems, d etermine whether maintenanc e 
has been or should  b e alerted .
Table 3-49. Trunk Group Performance Report  — Continued
Field Description
Continued on next page 
						

							DEFINITY Enterprise Communication Server Release 8.2
Reports Guide  555-233-505  Issue 1
April 2000
Traffic Data Analysis 
3-170 Trunk Outage Measurements Report 
3
Trunk Outage Measurements Report
The Trunk Outage Measurements Report lists up to a maximum of five trunks (in 
eac h trunk g roup ) out of servic e when samp led . The numb er of times the trunks 
are out of servic e when samp led  is also g iven. The trunk outag e d ata is kep t for 
the c urrent d ay, the p revious d ay, and  the last hour.
Command
To d isp lay the Trunk Outag e Measurements Rep ort:
1. Type list measurements outage-trunk  
[print/schedule] 
and  p ress 
RETU RN.
Required Fields: There is one req uired  field  for this c ommand  — 
yesterday/today/last-hour
. 
nEn t e r  yesterday 
to list the trunk g roup  ac tivity for yesterd ay. 
nEn t e r  today 
to list the trunk g roup  ac tivity for tod ay.
nEn t e r  last-hour
 to list the trunk g roup  ac tivity for the most rec ently 
c omp leted  hour.
Options: The print
 and  schedule 
op tions are availab le for this c ommand . % Time ATB
Perc ent of Time All Trunks Busy. The p erc ent of time all 
trunks in the trunk g roup  are simultaneously in use d uring the 
measurement interval.
NOTE:
In use means the trunks are b usy — either serving 
c alls, or b ec ause they are b usied -out b y maintenanc e.
Meas Hour
Measurement Hour. The starting  time (using  24-hour c loc k) 
of the hour d uring whic h the d ata is rec ord ed .
Total Calls
The total numb er of c alls (seizures) for the trunk g roup  d uring  
the p eak hour of b loc king.
Table 3-49. Trunk Group Performance Report  — Continued
Field Description
Continued on next page 
						

							DEFINITY Enterprise Communication Server Release 8.2
Reports Guide  555-233-505  Issue 1
April 2000
Traffic Data Analysis 
3-171 Trunk Outage Measurements Report 
3
Screen
Screen 3-60 shows a typ ic al sc reen for the Trunk Outag e Measurements Rep ort. 
Table 3-50
 describes the data fields presented in the Trunk Outage 
Measurements Rep ort.
Screen 3-60. Trunk Outage Measurements Report
Table 3-50. Trunk Outage Measurements Report 
Field Description
Grp No.
Group Numb er. The numb er that id entifies eac h trunk g roup  
assoc iated  with the d isp layed  d ata.
Continued on next page
list measurements outage-trunk yesterday 
Switch Name: Cust_Switch_Name       Date:  4:01 pm SAT MAY 19, 19xx 
     TRUNK OUT OF SERVICE REPORT 
(trunks sampled for out-of-service condition once each hour) 
Grp     Grp    Grp    Grp    Grp    #Sampled 
No.     Type   Dir    Size   Mbr#   Outages 
1       co     two    20      2      1 
1       co     two    20      4      8 
1       co     two    20      5      3 
1       co     two    20      6      2 
4       wats   out    10      2      5 
4       wats   out    10      4      3 
4       wats   out    10      9      2 
4       wats   out    10      10     1 
Command successfully completed 
Command: 
						

							DEFINITY Enterprise Communication Server Release 8.2
Reports Guide  555-233-505  Issue 1
April 2000
Traffic Data Analysis 
3-172 Trunk Outage Measurements Report 
3
Grp TypeGroup Type. The typ e of trunk assoc iated  with the 
ac c umulated  d ata. The system monitors the following  trunk 
typ es (see 
D EFINITY EC S Ad mi ni st ra tor’s  Gui d e):
nAccess (access
)
nAd vanc ed  Private Line Termination (aplt
)
nCentral Offic e (co
) or Public  Network Servic e
nCustomer Provid ed  Eq uip ment (cpe
)
nDig ital Multip lexed  Interfac e Bit Oriented  Sig naling  
(dmi-bos
)
nDirec t Inward  Dialing  (did
)
nDirec t Inward /Outward  Dialing  (diod
)
nFo re i g n  Ex c h a n g e  (fx
)
nInteg rated  Servic es Dig ital Network (isdn-pri
)
nRelease Link Trunk (rlt
)
nTand em (tandem
)
nTie Trunk (tie
)
nWid e Area Telec ommunic ations Servic e (wats
)
Grp Dir
Group Direc tion. Id entifies whether the trunk g roup  is 
inc oming  (inc
), outgoing (out
), or two-way (two
).
Grp Size
Group Size. The numb er of trunks in the trunk g roup .
Grp Mbr#
Group Memb er Number. The number that identifies a specific  
trunk memb er (in the group ) out of servic e.
Table 3-50. Trunk Outage Measurements Report  — Continued
Field Description
Continued on next page 
						

							DEFINITY Enterprise Communication Server Release 8.2
Reports Guide  555-233-505  Issue 1
April 2000
Traffic Data Analysis 
3-173 Trunk Outage Measurements Report 
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#Sampled 
OutagesNumber of Sampled Outages. The numb er of times the g roup  
member is samp led  as out of servic e over the p eriod  c overed  
b y the rep ort (yesterd ay, today, or last hour). Yesterd ay 
inc lud es the 24 hours beg inning at mid nig ht and  ending  at 
mid nig ht. Tod ay inc lud es those hours from mid nig ht to the 
most rec ently c ompleted  hour. Last hour only inc lud es the 
most rec ently c ompleted  hour.
NOTE:
If there are no outag es, no d ata is d isp layed .
Suggested Actions:
1. The sampling  p eriod is onc e p er hour. Therefore, if the 
rep ort c overs several hours (for examp le, the yesterd ay or 
today rep ort) b ut the c olumn only ind ic ates a small numb er 
of outag es, then the trunk member may b e p rovid ing  
intermittent servic e. To d etermine whether a sp ec ific  trunk 
memb er is func tioning , use the Fac ility Test Calls feature.
2. If a trunk is susp ec ted  of c ausing  p rob lems, use the ACA 
feature to monitor the p artic ular trunk g roup .
3. If a trunk memb er is totally out of servic e, then (dep end ing  
on loc al arrang ements) you may c hoose to refer the 
p roblem to maintenanc e p ersonnel.
Table 3-50. Trunk Outage Measurements Report  — Continued
Field Description
Continued on next page 
						

							DEFINITY Enterprise Communication Server Release 8.2
Reports Guide  555-233-505  Issue 1
April 2000
Traffic Data Analysis 
3-174 Trunk Group Status Report 
3
Trunk Group Status Report
The Trunk Group  Status report g ives a c urrent ind ic ation of the load  on various 
trunk g roup s in terms of the numb er of c alls waiting  to be servic ed .
For eac h trunk g roup , the Trunk Group  Status Rep ort d isp lays the numb er of c alls 
in the q ueue waiting  to b e servic ed . For c omp arative analysis, the trunk memb ers 
in the g roup  ac tive on c alls are also d isp layed. With this d ata, it is p ossib le to 
rearrang e the memb ers in the g roup s to p rovid e load  b alanc ing . For examp le, if 
one g roup shows a hig her number of c alls waiting in the q ueue and  the size of 
the g roup  is too small, more memb ers c an b e ad d ed  to that g roup .
Command
To d isp lay the Trunk Group  Status Rep ort:
1. Type monitor traffic trunk-groups [option] 
and press 
RETU RN.
Options: Entering  the c ommand  without an op tion p rod uc es a d isp lay of 
the first 60 ad ministered  trunk g roup s. To d isp lay hig her numbered  trunk 
g roups, enter the numb er of the first g roup  of the 60 trunk g roup s to b e 
d isp layed . Only those trunk g roup s ad ministered  are shown on the rep ort.
Bec ause the c ommand  is c onstantly up d ated , you must p ress 
CANCEL to 
cancel the command.
Screen
Screen 3-61 shows a typ ic al sc reen for the Trunk Group  Status rep ort. If the 
system has less than 60 g roup s ad ministered , then some of the rig ht-hand  
c olumns are b lank. The d ate and  time at whic h the report was req uested  are 
d isp layed  to the rig ht of the sc reen title. Table 3-51
 d esc rib es the d ata field s 
p resented  in the Trunk Group  Status report.
The d ata on the sc reen is up d ated  every 60 sec ond s. If the values of any of the 
field s for a g iven trunk g roup are c hang ed , all field s for that trunk g roup  are 
updated. 
						

							DEFINITY Enterprise Communication Server Release 8.2
Reports Guide  555-233-505  Issue 1
April 2000
Traffic Data Analysis 
3-175 Trunk Group Status Report 
3
Screen 3-61. Trunk Group Status Report
Table 3-51. Trunk Group Status Report
Field Description
#
Group Numb er. The numb er that id entifies eac h trunk 
group.
S
Group Size. The numb er of trunks ad ministered for the trunk 
group.
A
Ac tive Group  Memb ers. The numb er of trunk memb ers in 
the g roup  ac tive on a c all. Busied-out trunks are not ac tive.
Q
Queue Leng th. The leng th of the q ueue ad ministered  for the 
group.
W
Waiting  Calls. The number of calls waiting in the group 
q ueue.
monitor traffic trunk-groups 
TRUNK GROUP STATUS      19:03 SAT MAY 19 19xx 
 #    S   A   Q   W     #   S   A   Q   W     #   S  A  Q  W    #  S  A  Q  W 
 1   20  10   0   0    16  14   3   0   0    59   9  1  0  0 
 2   21  21  20  10    23   4   6   8   0    60   8  1 18  0 
 3   31  12   0   0    25   5   0   0   0    61   2  0  0  0 
 4   10   5  10   8    27  12   2  18   0    62   4  1  8  0 
 5    9   5  10   0    30   7   2  14   0    63   6  1 15  0 
 6   10   8  10   0    41   5   1   0   0    73   6  0  8  0 
 7    4   1   8   0    42  12   4  20   0   211  22  2  0  0 
 8    4   4   8   2    43   6   3   0   0 
 9    5   2  10   0    44  16   6  18   0 
10    7   3  14   0    45   8   0   0   0 
11    6   2  12   0    46   8   3  18   0 
12    5   2  10   0    54   9   2   0   0 
13    4   1   0   0    55   6   6  12   3 
14    5   4   8   0    57   8   4  10   0 
15    5   3   9   0    58   4   1   0   0 
(#: Group; S: Grp Size; A: Active Members; Q: Q length; W: Call Waiting.) 
						

							DEFINITY Enterprise Communication Server Release 8.2
Reports Guide  555-233-505  Issue 1
April 2000
Traffic Data Analysis 
3-176 Trunk Group Status Report 
3
Data Analysis Guidelines
The following guid elines are intend ed  to show an easy and  fast method  of 
d etermining  whether the c ollec ted  d ata is invalid  or q uestionable. These 
g uid elines represent the least you should  d o for valid ation. Perform add itional 
valid ation as nec essary.
Use the list p erformanc e trunk-g roup  rep ort to ob tain an overall ind ic ation of 
those trunk g roup s that may b e p rovid ing  p oor servic e. The five trunk g roup s with 
the hig hest p erc entag e of b loc king  are listed  in the list p erformanc e summary 
rep ort. However, this rep ort (summary) has the following  limitations:
nThe Group  Bloc king  shown on this rep ort is the p erc entage of b loc king  for 
outgoing and  two-way trunk g roup s. For inc oming  trunk g roup s, the Group  
Bloc king  value is the p erc entag e of all trunks b usy (ATB). A hig h value for 
either % ATB or the % Out Bloc king  is an ind ic ation of possible traffic  load  
problems.
nA two-way trunk g roup  with und esirab le inc oming  b loc king  d o not show 
any p rob lems on this report, sinc e only outg oing  b loc king  is d isp layed  on 
two-way trunks.
Use d ata from the Trunk Group  Measurements report for a more ac c urate 
estimate of servic e levels on inc oming  and two-way trunk g roup s. To valid ate the 
Trunk Group  Measurements rep ort, verify the following  d ata is in order:
nTotal Usage (in CCS) should not exc eed  36 times group  size. For examp le, 
with two trunks, the total usag e measured should  not exc eed  2 X 36 =  72 
CCS.
nOn inc oming  trunks, total seizures should  b e eq ual to total inc oming  
seizures.
nInc oming  trunk g roup s should  have a q ueue length of zero.
nThe numb er of inc oming  c alls should  never b e greater than the total 
numb er of c alls c arried  b y all trunks in the g roup.
nOutg oing  trunk g roup s should  ind ic ate zero as their numb er of inc oming 
calls.
nOut-of-servic e trunks should never b e g reater than g roup size.
nFor trunk group s with q ueues, the two field s (Calls Queued  and  Queue 
Overflow) should  total the numb er d isp layed  in the Group  Overflow field .
nFor trunk group s with q ueues, the Queue Overflow field  is inc remented  
whenever a c all find s the all trunks b usy c ond ition and  the q ueue is full.
nFor trunks g roup s without q ueues, the Calls Queued  and Queue Overflow 
field s are always zero. The bloc ked  c all c ount is reflec ted  in the Group  
Overflow field . 
						

							DEFINITY Enterprise Communication Server Release 8.2
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April 2000
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nIf the Perc ent Outgoing Bloc king  field shows a value g reater than zero, the 
Queue Overflow (if a q ueue is ad ministered  for the trunk g roup ), Queue 
Ab and on, and Group  Overflow field s should  also have values g reater than 
zero.
nMeasurement hour d ata rep orted  in the System Status Rep ort (for 
examp le, monitor system view1 or monitor system view2) should  
c orresp ond  to those shown on the hourly trunk g roup  measurements and  
performance reports.
Analyzing the Data
The Trunk Group  Summary Report may b e used  to d etermine:
nAverag e Hold ing  Time
nTrunk Bloc kag e
nNumber of trunks required for a specified Grade of Servic e
NOTE:
Data c ollec ted  in a real-time environment virtually always d eviates 
from the theoretic ally p red ic ted data b ec ause of the async hronous 
nature of proc esses and interac tions with other events suc h as 
maintenanc e.
Determining Average Holding Time
Determine the Averag e Hold ing  Time (in sec ond s) of a trunk g roup  b y divid ing  
the Total Usag e CCS b y Calls Answered  and  multip lying  the result b y 100. A 
short hold ing  time c an ind ic ate troub le.
Example:
Assume the following  d ata is rep orted  for a one-way trunk g roup :
nTotal Usag e CCS =  656 CCS
nTotal Seizures =  280
Determine the Averag e Hold ing  Time as follows: 
Average Holding Time=ì
ï
îTotal Seizures Total Usage CCS
_
  _______________ü
ï
þ´
CCS 100Seconds
_
  ___________
Average Holding Time=ì
ï
î280 656CCS
_
  ________ü
ï
þ´
CCS 100Seconds
_
  ___________
Average Holding Time=234seconds(or3minutesand 54seconds) 
						

							DEFINITY Enterprise Communication Server Release 8.2
Reports Guide  555-233-505  Issue 1
April 2000
Traffic Data Analysis 
3-178 Trunk Group Status Report 
3
Determining Trunk Group Blockage
Generally, use either the list measurements trunk-g roup  summary or list 
performance trunk-group report for determining trunk group blockage. All of the 
ap p rop riate c alc ulations are p erformed  b y the system and  the results are 
d isp layed  via the reports. However, to b e c omp lete, the eq uations and  an 
examp le are inc lud ed .
To d etermine the Perc ent Bloc king for one-way outg oing  and  two-way trunk 
groups, respectively, use the following equations:
One-Way Trunk Group  (outg oing )
Two-Way Trunk Group
NOTE:
If the trunk g roup has a q ueue, g roup  overflow is c alc ulated  as follows: 
Example:
With the following data, determine the Perc ent Bloc king  of a two-way CO trunk 
g roup without a q ueue:
nTotal Seizures =  280
nInc oming  Seizures =  170
nGroup  Overflow =  6
Using  the eq uation for two-way trunk group s, you c an c alc ulate average Perc ent 
Bloc king  as follows: 
Percent Out Blocking=ì
ï
îTotal Seizures+Group Over f low Group Over f low
_
  _____________________________ü
ï
þ´100 %
Percent Out Blocking=
ì
ï
îTotal Seizures-Incoming Seizures+Group Over f low Group Over f low
_
  _______________________________________________ü
ï
þ´100 %
Group Over f low=Queue Over f low+Queue Abandons
Percent Blocking=ì
ï
î( 280-170 )+6 6
_
  ________________ü
ï
þ´100=5. 2  %