Lucent Technologies Definity Audix System Administration Guide

							DEFINITY AUDIX System Administration  585-300-507  Issue 7
May 1999
Feature Administration 
3-29 TDD 
3
The d oc umentation ship p ed  with the td d  announc ement set p rovid es an estimate 
of the numb er of b loc ks of storag e the announc ement set oc c up ies on the 
system. 
Assig n the tdd  announc ement set to users either on the Class of Servic e sc reen 
or on the Sub sc rib er sc reen. The td d announc ement set c an b e the Log in 
Announc ement Set, the Call Answer Primary Announc ement Set, or the Call 
Answer Sec ond ary Announc ement Set. 
There are several c onsid erations when dec id ing  how to ad minister the 
Multiling ual feature and c all c overag e for the hearing -imp aired  TTY user. For 
examp le: 
nDo you exp ec t the hearing -imp aired  p erson to rec eive voic e c alls? 
nDoes the p erson have suffic ient hearing  ab ility to listen to voic e 
messag es? 
nIs your c omp any able to p rovide c all c overag e to a TTY translator servic e 
for hearing-imp aired  users who c annot listen to voic e messag es? 
It may b e more p rac tic al to set the Multiling ual feature Call Answer Language 
Choice
 field  to “ n”  (no) on the Sub sc rib er or Class of Servic e sc reen unless b oth 
the p rimary and  sec ond ary announc ement sets are td d  (suc h as U.S. Eng lish td d  
and  another td d -b ased  lang uage whic h may b e availab le in the future). 
In the example below, Mary Jones has no hearing and does not speak; and her 
c omp any has an in-house TTY translation servic e to hand le inc oming  voic e c alls. 
Th e  Call Answer Language Choice
 field  is set to “ n”  (no) for Mary, and  she 
has one p ersonal g reeting . 
The system ad ministrator, or another sp eaking  p erson, rec ord s the first p art of 
Mary’s p ersonal g reeting  whic h is very short. If the td d  announc ement set is the 
Log in Announc ement Set for Mary Jones, the g reeting  p romp ts are in TTY; in 
whic h c ase, the sp eaker removes the hand set from the TTY ac oustic  c oup ler 
when the GA p romp t d isp lays on the TTY, voic es the g reeting , and  then returns 
the hand set to the ac oustic  c oup ler either to rec ord  the TTY p art of the g reeting  
or to await more promp ts. 
The following c ould  b e the voic e part of a g reeting  rec orded  for Mary Jones: 
“ This mailb ox b elong s to a hearing -imp aired  user, Mary Jones. To leave 
a voic e messag e, p ress zero now.”   
						

							DEFINITY AUDIX System Administration  585-300-507  Issue 7
May 1999
Feature Administration 
3-30 TTY Automated Attendant 
3
Pressing  zero would  send  the c aller to the extension of a hearing  p erson who c an 
transc rib e voic e messag es to TTY messag es and send  them to the mailb ox of 
Mary Jones. The transc rib er need s to b e ad ministered  as a c overing  extension 
on the Sub sc rib er sc reen for this arrang ement. The sec ond  p art of Mary’s 
p ersonal g reeting  is in TTY, p rob ab ly rec ord ed  b y Mary or the p erson who 
rec ord ed  the voic e p art of the g reeting . The TTY p art of the g reeting  need s to b e 
rec ord ed  d uring  the same rec ord ing  session as the voic e p art. (In other word s, 
Mary’s g reeting  c ontains b oth voic e and  TTY. The voic e p art is first and  very 
short so that it d oes not c ause a d elay in the TTY g reeting  seen b y the TTY c aller. 
The TTY part immed iately follows the voic e p art.) 
The ab ove examp le illustrates one p ossib le sc enario for ad ministering  the TTY 
user. Consid er the TTY user’s need s, the req uirements of his or her job , and  c all 
c overag e c ap abilities availab le at your c omp any. 
TTY Automated Attendant
You c an c reate TTY automated attend ants using  the td d  announc ement set. You 
need  a TTY to ad minister the TTY automated  attend ant menus (availab le from 
any Luc ent Prod uc t Rep resentative); a TTY with a b uffer is rec ommend ed  
b ec ause you will want to ed it the menu b efore d ownload ing  it to the DEFINITY 
AUDIX system. It also is rec ommend ed  that you have the tdd  announc ement set 
running  when you ad minister the automated  attend ant menus. If the td d  
announc ement set is not running when you rec ord an automated  attend ant 
menu, you c an p ut your ear to the hand set resting in the ac oustic  c oup ler to hear 
the sp oken DEFINITY AUDIX announc ements. If you are not familiar with using  a 
TTY, refer to the user’s g uid e that c ame with the TTY. 
Refer to the Automated  Attend ant feature earlier in this c hap ter for instruc tions on 
setting  up  an automated  attendant. Instead  of rec ord ing  the attend ant menu 
using the telep hone, you typ e the menu using  the TTY keyb oard . Also, refer to 
Chapter 9, ‘‘Automated  Attend ant’’, for more d etailed  instruc tions on automated  
attend ants. It is strong ly rec ommend ed , b ut not req uired , that you have sep arate 
telep hone numb ers for TTY automated  attendants and  for voic ed  automated  
attend ants. Otherwise, TTY users may see either nothing or unread ab le 
c harac ters resulting  from voic e promp ts or g reeting s, and hearing  users may 
enc ounter some TTY messag ing  noise. 
Mod e Sync hronization. TTYs use the Baud ot c ommunic ations p rotoc ol in whic h 
the same five-b it c od e c an rep resent either a letter or a non-alphab etic  
c harac ter, suc h as a numb er or fig ure. (For examp le, the b inary c od e 00001 is 
b oth the letter E and  the numb er 3.) This sharing  of five-b it c od es is mad e 
p ossib le by having  two mod es, a letters mod e and  a numbers/fig ures mod e.  
						

							DEFINITY AUDIX System Administration  585-300-507  Issue 7
May 1999
Feature Administration 
3-31 TTY Automated Attendant 
3
If a rec eiving  TTY is set to letters mod e (b y rec eiving  the five-bit c od e 11111), 
then the TTY assumes all sub seq uent five-b it c harac ter c od es rec eived  are 
letters. By c ontrast, if a rec eiving  TTY is set to numb ers/fig ures mod e (b y 
rec eiving  the five-b it c od e 11011), then the TTY assumes all sub seq uent five-b it 
character c odes received are numbers and figures. This is important; when a 
TTY is not in the same mod e as the d evic e that is transmitting to it, the c harac ters 
that d isp lay on the rec eiving  TTY will make no sense to the user. 
All DEFINITY AUDIX td d  announc ements c ontain the ap p rop riate mod e reset 
c od es to ensure that the rec eiving  TTY stays mod e-sync hronized  with the 
DEFINITY AUDIX system d uring menu p layb ac k. It is, however, the system 
ad ministrator’s resp onsib ility to ensure mod e sync hronization when rec ord ing  
TTY m e n u s.  
Some TTYs have b oth a letters key and  a numb ers/fig ures key for switc hing  to the 
indic ated  mod e. If the first c harac ter in a menu is a letter, p ress the letters key 
b efore you typ e anything  else; or, if the first c harac ter in a g reeting  is a numb er or 
fig ure, p ress the numb ers/fig ures key b efore you type anything  else. 
Most TTYs d o not have a letters key and a numb ers/fig ures key. If you d o not 
have sep arate letters and  numb ers/fig ures keys, sync hronization of mod es is 
less c onvenient b ut c an b e ac c omp lished  in the following  way: 
nIf the first c harac ter you need  to typ e is a letter, enter a slash (/); then 
p ress the sp ac e b ar a few times b efore you start typ ing. This c auses the 
system to reset to letters mod e. 
nIf the first c harac ter you need  to typ e is a numb er or fig ure, typ e x
; then 
p ress the sp ac e b ar a few times b efore you start typ ing. This c auses the 
system to reset to numb ers/fig ures mod e. 
General g uid elines on g enerating  menus. TTY users need  to use b oth the TTY 
keyb oard  and  the touc h-tone telep hone keyp ad . The instruc tions c ontained  in 
automated  attend ant menus must make it c lear whic h d evic e to use. You mig ht 
want to use 
dial when the user need s to use the telep hone keyp ad  and  typ e 
when the user need s to use the TTY keyb oard . 
When using  a TTY to typ e direc tly to the DEFINITY AUDIX system, the DEFINITY 
AUDIX system c ap tures and  p reserves any hesitations in typ ing s, missp elling s, 
and  so on. For this reason, it is rec ommend ed  that system ad ministrators use a 
TTY with a b uilt-in b uffer and  c omp letely ed it the menu b efore c alling  the 
DEFINITY AUDIX system to d ownload  the b uffer. Refer to your TTY user’s guid e 
for instruc tions on ed iting and  d ownload ing  the TTY b uffer.  
						

							DEFINITY AUDIX System Administration  585-300-507  Issue 7
May 1999
Feature Administration 
3-32 Traffic Reports 
3
Traffic Reports
The Traffic  Rep ort feature p rovid es sub sc rib er, c ommunity, feature, and  p ort 
ac tivity measurements for a DEFINITY AUDIX system, AMIS Analog  Networking , 
and  Messag e Delivery b y the hour, d ay, or month. This information is used  to 
monitor ac tual system use and  d etermine if an ap p rop riate level of servic e is 
being provided. 
Traffic  d ata c ollec tion is ac tivated  or d eac tivated  on the System-Parameters 
Features
 sc reen. The p rime c ollec tion hours (your normal b usiness hours) also 
are d efined  on this sc reen. Collec tion instruc tions, inc lud ing  the typ es of 
information to c ollec t and  for what p eriod s, are sp ec ified  on the ind ivid ual 
Measurements
 sc reens that p rod uc e and  d isp lay the rep orts. 
Refer to Chap ter 8, ‘‘Traffic  Rep orts’’, for information ab out ad ministering  and  
using DEFINITY AUDIX traffic  system rep orts. 
Transfer into AUDIX
Transfer into AUDIX is both a switc h feature and a DEFINITY AUDIX feature. If 
your AUDIX system uses 
enhanc ed  transfer out of AUDIX, a c overing  user c an 
transfer the c alling  p arty d irec tly into the c alled  sub sc rib er’s mailb ox for Call 
Answer treatment. This c ap ab ility is 
not available with b asic  transfer. However, a 
covering  user still can accomp lish a transfer into mailb ox 
ind irectly b y re-entering  
the c alled subsc rib er’s extension. 
For more information on this feature, refer to 
DEFINITY AUDIX System — Feature 
Desc rip tions
, 585-300-206. 
Transfer Out of AUDIX
The Transfer Out of AUDIX feature allows a DEFINITY AUDIX subscriber who 
c alls the DEFINITY AUDIX system (or any c aller who is red irec ted  to the 
DEFINITY AUDIX system) to use the     (Transfer) c ommand  to exit and  
transfer to any extension g iven p ermission on the 
transfer-d ialplan sc reen. 
Call transfer is used  to transfer out of the DEFINITY AUDIX system to another 
extension. Call transfers out of AUDIX c an b e c omp leted  only to numb ers you 
have ad ministered  on the 
transfer-d ialp lan sc reen. There are two typ es of c all 
transfer: b asic  and  enhanc ed . Dep end ing  on your hard ware and  c hoic e of p ort 
emulation, Basic  Call Transfer may b e available with either kind of switc h 
integ ration. Enhanc ed  Call Transfer is availab le only with Control-Link switc h 
integ ration. Use the System-Parameters Feature sc reen to d efine the TRANSFER 
TYPE.  
*T 
						

							DEFINITY AUDIX System Administration  585-300-507  Issue 7
May 1999
Feature Administration 
3-33 Transfer Out of AUDIX 
3
Call Transfer Dialplan
Before you c an enab le transfer out of the AUDIX system, you must have filled  in a 
transfer d ialp lan. This form g ives you c ontrol in d etail over user c all transfers and  
help s to p revent toll fraud . Onc e filled  in, this form sp ec ifies extensions to whic h a 
c aller may transfer. Callers may not transfer to uninc lud ed  extensions nor to 
extensions exp ressly p rohibited  on the form. You may want, for examp le, to forb id  
c all transfer to extensions b eg inning  with “ 9”  if this numb er c auses ac c ess to an 
outsid e line.
Use the 
change transfer-dialplan sc reen to p rep are for transfers out of the AUDIX 
system.
To write a transfer d ialp lan:
1. Ac c ess AUDIX Ad ministration and  enter the c ommand : ch tr
 (for 
change 
transfer-d ialp lan
). The TRA N SFER D I A LPL A N sc reen ap p ears. On the 
sc reen are two head ing s. Eac h head ing  ap p ears over a matrix within 
whic h you are to enter mailb ox extension numb ers.
2. As you enter the sc reen, the c ursor is in the first position und er the 
head ing  that c alls for p ermitted  extension numb ers. In this p osition and  in 
p ositions to the rig ht of and  b elow this first p osition, enter numb ers with 
these characteristics:
nEac h entry must rep resent extensions to whic h it is safe for any 
c aller to b e transferred .
nEac h entry must b e as long  as a valid  mailb ox extension for this 
system.
nEac h entry must b eg in with a numb er. Sub seq uent d ig its may b e 
rep resented by an “ X”  or “ x”  whic h c an b e taken to mean “ any 
n u m b e r . ”  C o n s e q u e n t l y,  t h e  e n t r y “ 7 XXXX, ”  m e a n s  “ a n y n u m b e r 
b etween 70000 and  79999.”
nNo X/x c an p rec ed e a numb er.
nNo two p ermitting entries c an overlap eac h other. 
3. Move the c ursor to the first position und er the head ing  that c alls for 
restric ted  extension numb ers. In this p osition and  in p ositions to the rig ht 
of and  b elow this first p osition, enter numb ers with these c harac teristic s:
nEac h entry must rep resent extensions to whic h transfer from the 
AUDIX system should  b e forb id d en.
nEac h entry must b e as long  as a valid  mailb ox extension for this 
system.
nEac h entry must b eg in with a numb er. Sub seq uent d ig its may b e 
rep resented by an “ X”  or “ x”  whic h c an b e taken to mean “ any 
n u m b e r . ”  C o n s e q u e n t l y,  if  7 XXXX is  p e r m it t e d ,  b u t  7 5 XXX i s 
restric ted , one c an transfer from AUDIX to any numb er b eg inning  
with “ 7”  exc ep t for numb ers b etween 75000 and  75999.
nNo X/x c an p rec ed e a numb er.
nNo two restric ting  entries c an overlap  eac h other.  
						

							DEFINITY AUDIX System Administration  585-300-507  Issue 7
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Feature Administration 
3-34 Transfer Out of AUDIX 
3
Basic Call Transfer
Basic  Call Transfer uses a switc hhook-flash method  to send  the transfer 
c ommand  over voic e p orts. The DEFINITY AUDIX system g oes off-hook, waits for 
a d ial-tone, dials the transfer numb er, then waits ag ain for the c onnec tion to 
c omp lete. If the c alled number is b usy, c allers will hear nothing  and  must hang  
up  (c allers are not automatic ally returned  to DEFINITY AUDIX). 
Basic  c all transfer out of the DEFINITY AUDIX system is ac tivated  or d eac tivated  
on the System-Parameters Features
 sc reen. When this feature is d isab led, the 
return c all, Esc ape to Attend ant, and Automated  Attend ant features also are 
d isallowed  b ec ause these features rely on c all transfer c ap ability. Call transfer is 
limited  to numb ers g iven p ermission to transfer on the 
transfer-d ialp lan sc reen. 
See Chap ter 10, ‘‘Ong oing  System Sec urity’’ for more information.
!WARNING:
Your system is more susc ep tib le to toll fraud  with Basic  Call Transfer than it 
is with Enhanc ed  Call Transfer. Refer to 
Chapter 10, ‘‘Ong oing  System 
Se c u ri t y ’’
, for more information on guard ing  your system ag ainst toll fraud. 
Enhanced Call Transfer
With Enhanc ed  Call Transfer, the DEFINITY AUDIX system c ollec ts all the 
relevant d ata and  send s it to the switc h using  a transfer messag e. Sinc e 
Enhanc ed Call Transfer allows transfer req uests only to valid  extensions on the 
switc h, c allers attemp ting  to p lac e unauthorized  long -d istanc e c alls b y 
transferring  out of the DEFINITY AUDIX system will hear a messag e stating  that 
the numb er they d ialed  is not a valid extension and  their transfer req uest is 
d enied . 
Enhanc ed Call Transfer offers the following  features: 
nThe transfer is q uic k. 
nThere are two Transfer Typ es that app ly when the c aller presses 0 to 
esc ap e to the operator after b eing  forward ed  to the DEFINITY AUDIX 
system: 
—enhanced_no_cover_0
 treats the c all as a 
red irec ted c all. The 
c all will not b e subjec t to c all c overag e or c all forward ing  as 
d efined  for the sp ec ified  d estination extension. 
—enhanced_cover_0
 treats the c all as a 
direct c all p rovid ing  c all 
c overag e and  c all forward ing  as d efined  for the d estination 
extension. 
nIf the c all fails (i.e., the c alled  extension is b usy or an invalid number is 
entered ), the DEFINITY AUDIX system rep orts the failure c ond ition to the 
caller.  
						

							DEFINITY AUDIX System Administration  585-300-507  Issue 7
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Feature Administration 
3-35 Voice Mail 
3
nA failed  transfer is not ab and oned . Instead : 
— All c allers may req uest another transfer by p ressing      ag ain. 
— Callers who have b een red irec ted  to the DEFINITY AUDIX system 
throug h Call Answer and c annot c omp lete a transfer still c an leave 
a message for the c alled  p arty. 
— Callers who d ialed  the DEFINITY AUDIX system d irec tly and  c annot 
c omp lete a transfer are returned  to the previous DEFINITY AUDIX 
ac tivity. 
nA transfer attemp t does not return to the DEFINITY AUDIX system und er 
two c ond itions 
— A c all reac hes an unattend ed  p hone and  no c all-c overag e is 
availab le (the p hone ring s ind efinitely). 
— The system ad ministrator spec ifies, on a system-wid e b asis, that 
c alls transferred  to the switc h are to be treated  as 
red irec ted calls 
(enhanc ed _no_c over_0 in the Transfer Type
 field ). This ap p lies 
when the c aller p resses 0 or *0 to esc ap e to the operator after 
b eing  forward ed  to the DEFINITY AUDIX system. If the c all is 
red irec ted , the c all will not b e sub jec t to c all c overag e or c all 
forward ing  as d efined  for the sp ec ified  d estination extension. Thus, 
if the destination is b usy or forward ed  (inc lud ing  Send -All-Calls); 
the transfer will fail and  the switc h will rec onnec t the c aller to the 
DEFINITY AUDIX system. The system then p romp ts the c aller for 
alternative ac tions.    Call transfer is limited  to numb ers g iven 
p ermission to transfer on the 
transfer-d ialp lan sc reen. See Chap ter 
10, ‘‘Ong oing  System Sec urity’’ for more information.
NOTE:
Enhanc ed  Call Transfer is an effec tive way to p rohib it c allers from 
transferring  out of the DEFINITY AUDIX system and  p lac ing  unauthorized  
long -d istanc e p hone c alls (also known as toll fraud ). 
For more information on the c all transfer feature and  related  system sec urity 
issues, refer to Chap ter 10, ‘‘Ong oing  System Sec urity’’. 
Voice Mail
The Voic e Mail feature allows sub sc rib ers to rec ord  messag es for delivery to 
other sub sc rib ers’ voic e mailb oxes. This is d ifferent from c all answer, where a 
c aller (sub sc rib er or not) is transferred  into the DEFINITY AUDIX system to leave 
a message for a sub sc rib er who d oes not answer his or her p hone. No spec ific  
DEFINITY AUDIX system ad ministration is req uired  to use this feature. 
*T 
						

							DEFINITY AUDIX System Administration  585-300-507  Issue 7
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Feature Administration 
3-36 Voice Mailbox 
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Voice Mailbox
The Voice Mailbox feature provides a storage area on the DEFINITY AUDIX hard 
d isk where sub sc rib er messag es are stored . DEFINITY AUDIX sub sc ribers are 
automatic ally assig ned  a voic e mailbox when ad ministered  on the Sub sc rib er 
sc reen. Eac h sub sc rib er c ontrols ac c ess to his or her voic e mailb ox with a 
password.
The system administrator controls characteristics of the voice mailbox such as 
the seq uenc e of messag es for playb ac k, the leng th of time to store messag es, 
and  the amount of d isk sp ac e assig ned  for the mailb ox. This ad ministration is 
p erformed either on the ap p rop riate Class of Servic e sc reen for all sub sc rib ers 
assig ned  a g iven c lass-of-servic e or d irec tly on the Sub sc rib er sc reens of 
individ ual sub scrib ers. 
						

							Ongoing Preventive Maintenance 
4-1 Overview 
4
DEFINITY AUDIX System Administration  585-300-507  Issue 7
May 1999
4
Ongoing Preventive Maintenance
This c hapter d esc rib es your ong oing  maintenanc e resp onsibilities as an 
ad ministrator. It lists ad ministrative tasks that must b e p erformed  on a reg ular 
b asis to ensure that your system is running  effic iently and  to thwart p otential 
p rob lems throug h early d iag nosis. 
Overview
Preventive maintenanc e that you p erform on a reg ular b asis is the key to 
problem-free operation and a major part of your responsibility as a DEFINITY 
AUDIX system ad ministrator. Preventive maintenanc e tasks rang e from c hec king  
alarm log s and  taking  c orrec tive ac tion to monitoring  system p erformanc e and  
p rojecting  your c omp any’s future DEFINITY AUDIX system cap ac ity 
req uirements based  on c urrent usag e and  exp ec ted  g rowth. 
It is very imp ortant that you estab lish a reg ular routine for p erforming  
ad ministrative maintenanc e. Problems that tend  to c omp ound  themselves c an b e 
id entified  and  c orrec ted  early when maintenanc e is p erformed  reg ularly, and  
information that is c ollec ted  for analysis will be more reliab le if samp les are 
c omp ared for id entic al c ollec tion p eriod s. 
Preventive maintenanc e tasks that must b e performed  on a d aily, weekly, and  
monthly b asis are d esc rib ed  in this c hapter. These are followed  b y tasks you c an 
p erform on an as-need ed  or p eriod ic  b asis to measure your system’s 
p erformanc e effic ienc y and  p rojec t future c apac ity req uirements.  
						

							DEFINITY AUDIX System Administration  585-300-507  Issue 7
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Ongoing Preventive Maintenance 
4-2 Your Responsibility as an Administrator 
4
Your Responsibility as an 
Administrator
Resp onsib ility for maintaining  your DEFINITY AUDIX system is sp lit between you 
and  other Luc ent org anizations as follows: 
nThe Luc ent Tec hnic al Servic e Center (TSC) is resp onsib le for remote 
maintenanc e on your mac hine in resp onse to system alarms that are sent 
to the TSC b y your DEFINITY AUDIX system. While resp ond ing  to these 
alarms, TSC p ersonnel will also resp ond  to error log  information they 
notic e that c ould  help  prevent further p rob lems, b ut they d o not routinely 
c hec k your error log s exc ep t when resp ond ing  to alarms. If you c hoose to 
turn off alarm orig ination or otherwise p revent inc oming  maintenanc e 
logins, the TSC c annot be resp onsib le for remote maintenanc e of your 
system. 
nYou are responsible for the daily, weekly, and monthly tasks desc ribed in 
this c hap ter, whic h inc lud e b ac king  up  filesystems and  resp onding  to 
errors rep orted  in the system administration log . 
Daily Preventive Maintenance Tasks
Perform the following  preventive maintenanc e tasks eac h d ay, p referab ly the first 
thing  every morning : 
1. Log  in to the system at your ad ministration terminal. 
2. Chec k the status line for system alarms (major, minor, and  warning ). 
If the status line d isp lays M, m, w,
 or A
, alarms are p resent. Chec k the 
Alarm Log and  the Ad ministration Log  for loc al errors as d esc rib ed  in 
Chapter 7, ‘‘Alarms, Log s, and  Aud its’’. 
3. Check the status line for system threshold alarms (lower, middle, or upper) 
as described in Chap ter 7, ‘‘Alarms, Log s, and Aud its’’. This c hap ter 
sug g ests c orrec tive ac tions you mig ht c onsid er imp lementing. 
4. Monitor DEFINITY AUDIX system traffic  b y reviewing  the traffic  rep orts for 
the current day and previous day: 
— list measurements feature d ay 
— list measurements load  d ay 
— list measurements sp ec ial-features d ay 
These reports, described in Chap ter 8, ‘‘Traffic  Rep orts’’, p rovide a wid e 
rang e of information ab out how your DEFINITY AUDIX system is b eing  
used  and  how effic iently it is p erforming. Stud y the rep orts with a c ritic al 
eye, looking  for p rob lems and  p otential p rob lems that may b e g leaned  
from report statistic s. When you d o this every day, d isc rep anc ies from 
normal traffic  p atterns will b e easy to spot.