Lucent Technologies DEFINITY Enterprise Communications Server Release 8.2 Installation And Maintenance For Survivable Remote EPN Manual

							DEFINITY® Enterprise Communications Server Release 7 Installation and 
Maintenance for Survivable Remote EPN  555-233-102  Issue 2
June 1999
SREPN Maintenance 
2-25 Fault isolation procedures 
2
TN2301 has d isc onnec ted  from the SREPN, and  the SRP is no 
long er in c ontrol. Connec tions have b een re-estab lished  b etween 
the EI in the SREPN and  its EI/SNI c ounterp art in the Release 7r. 
Fault isolation procedures
Use the following  p roc ed ure to isolate faults on a fib er link. This sec tion c ontains 
information on:
n‘‘Fib er fault isolation’’
n‘‘Loopback tests’’
Fiber fault isolation
!CAUTION:
On systems with d up lic ated  Port Network Connec tivity (PNC), first b usyout 
the standby PNC (busyout pnc-standby
) b efore b usying out any of the 
following standby components:
nFiber-Link (FIBER-LK)
nSt a n d b y  Ex p a n s io n  I n t e r f a c e  ( EXP- I N TF)
nSwitc h Nod e Interfac e (SNI)
nDS1 Converter (DS1-CONV)
!WARNING:
Calls are d rop p ed when b usying  out of any of these c omp onents on a 
simp lex PNC.
!CAUTION:
Be sure to release all b usied  out c omp onents after c omp leting  the tests.
To isolate fib er link faults use two p roc ed ures:
n‘‘Gather information’’
n‘‘Test the fib er link hard ware’’
Gather information
1. Know whic h fiber sp an to isolate b y using  the link information (status 
health
) reports from b oth the Release 7r and  the SREPN and  the 
information in Tab le 2-7
.
2. Enter display alarms
 and press 
En t e r. 
						

							DEFINITY® Enterprise Communications Server Release 7 Installation and 
Maintenance for Survivable Remote EPN  555-233-102  Issue 2
June 1999
SREPN Maintenance 
2-26 Fault isolation procedures 
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3. Type pnc
 in the Category
 field , then c hoose En t e r.
NOTE:
Sinc e the system is in Survive mod e, the Release 7r thinks it has lost 
its c onnec tions to the EPN. Therefore, alarms may b e p resent, even 
thoug h the p rob lem has been diag nosed  and  fixed .
4. Look for any 
on-b oard alarms other than the EI c irc uit p ac k. If there are 
any, rep lac e the c irc uit p ac k. Do not rep lac e the EI c irc uit p ac k unless 
there are on-board alarms.
If No,
5. Enter display errors
 and press 
En te r.
6. Type pnc
 in the Category
 field , then c hoose 
En t e r.
7. Check for any of the following errors:
8. If you find 
one or more of the ab ove errors, g o to Step  10.
9. If you find 
none o f  t h e  e r ro r s in  St e p  7 ,  t h e n  re s o l v e  a n y SN I -PEER e r ro r s .
a . I f  t h e re  is  o n e  SN I  c irc u i t  p a c k  w i t h  m a n y  d i ff e re n t  SN I - PEER e rro r  
types, replace the indicated SNI circuit pack
b . I f  t h e re  a re  m a n y SN I -PEER e r ro r s  o f  t h e  sa m e  e rro r  t y p e ,  re p la c e  
the indic ted  SNI c irc uit pac k using Tab le 2-10
.
Maintenance 
ObjectError 
Ty p e
FIBER-LK Any
SN I- B D 51 3
EXP-INTF 257 769 
770 
1281 
1537 
3073 
3074 
3075 
3076 
3585 
3841 
3842 
						

							DEFINITY® Enterprise Communications Server Release 7 Installation and 
Maintenance for Survivable Remote EPN  555-233-102  Issue 2
June 1999
SREPN Maintenance 
2-27 Fault isolation procedures 
2
c . After rep lac ing  an SNI c irc uit p ac k, c lear alarms b y exec uting  test 
board UUCSS long clear
 for all alarmed  EXP-INTF c irc uit p ac ks. 
Wait 5 minutes for any SNI-BD or SNI-PEER alarms to c lear.
NOTE:
You c an sp eed  this p roc ess with clear firmware counters 
[a-pnc
|b-pnc
] for the repaired PNC.
10. Enter list fiber-link
 to g et the p hysic al loc ation of the fib er-link end p oints.
11.  If a DS1 CONV is ad ministered  to the fiber-link (DS1 CONV is y
), enter 
display fiber-link
  to d etermine the p hysic al loc ation of the DS1 CONV 
c irc uit p ac ks on the fiber-link.
12. Busyout the fiber link (busyout fiber-link 
number).
13. Test the fib er link (test fiber-link 
number long
).
14. If any tests in the sequenc e fail, p roc eed  with ‘‘
Test the fiber link hard ware’’ 
below.
Table 2-10. SNI-PEER errors 
Error Type SNI slot
12
257 3
513 4
769 5
1025 6
1281 7
1537 8
1793 9
2049 13
2305 14
2561 15
2817 16
3073 17
3329 18
3585 19
3841 20
Continued on next page 
						

							DEFINITY® Enterprise Communications Server Release 7 Installation and 
Maintenance for Survivable Remote EPN  555-233-102  Issue 2
June 1999
SREPN Maintenance 
2-28 Fault isolation procedures 
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NOTE:
Test #759 may fail if SNI c irc uit pac ks are p resent.
15. If 
all of the tests p ass, c lear the alarms b y exec uting  test board UUCSS 
long clear
 f o r  a l l a la r m e d  EXP- I N TF c i rc u i t  p a c ks .  Wa it  5  m i n u t e s f o r  a n y 
SNI-BD, SNI-PEER, FIBER-LK, or DS1C-BD alarms to c lear.
NOTE:
Test attemp ted  on the EI c irc uit pac k in the SREPN d o not run.
NOTE:
Th e  clear firmware counters 
[a-pnc | b-pnc] c ommand  for the PNC 
that was rep aired  may b e q uic ker than c learing  the alarms with the 
test board UUCSS long clear
 c ommand .
Test the fiber link hardware
For eac h end p oint of the fib er link:
1. Busyout the c irc uit p ac k (busyout board UUCSS
).
2. Test the c irc uit p ac k (test board UUCSS long
) and  rec ord  all test failures. 
When looking  at test results, c onsult the exp lanations for Fig ure 2-17
 and 
Fi g u re  2 - 1 8
 later in this c hap ter.
3. Does Board Not Assigned
 d isp lay for an Exp ansion Interfac e in an 
EPN ? 
a. If 
Ye s, use the test maintenance long
 c ommand  to release an 
Exp ansion Interfac e that may b e held  reset b y an EPN Maintenanc e 
circuit pack.
NOTE:
Tests attemp ted  on the EI c irc uit p ac k in the SREPN d o not run.
4. If 
No, Did  EXP-INTF Test #242 fail? 
a. If Yes, rep lac e the EI c irc uit p ac k and  the lig htwave transc eiver (if 
p resent) and  g o bac k to Step  12 in the ‘‘
Gather information’’ 
p roc ed ure ab ove. 
NOTE:
EXP- I N TF Te s t  # 2 4 2  r u n s a n  o n - b o a rd  l o o p a ro u n d  if  n o  l ig h t w a v e  
transc eiver is c onnec ted  to the EI.
5. If 
No, Did  SNI Test #757 fail? 
a. If 
Ye s, rep lac e the SNI c irc uit pac k and  go b ac k to Step  12 in the 
‘‘
Gather information’’ p roc ed ure ab ove. 
						

							DEFINITY® Enterprise Communications Server Release 7 Installation and 
Maintenance for Survivable Remote EPN  555-233-102  Issue 2
June 1999
SREPN Maintenance 
2-29 Fault isolation procedures 
2
6. If No, Did  SNI Test #756 fail? 
a. If 
Ye s, rep lac e the SNI c irc uit pac k and  the lig htwave transc eiver (if 
p resent) and  g o bac k to Step  12 in the ‘‘
Gather information’’ 
p roc ed ure ab ove.
7. If 
No, Did  EXP-INTF Test #240 fail?
a. If 
Ye s, rep lac e the EI c irc uit p ac k and  g o b ac k to Step  12 in the 
‘‘
Gather information’’ p roc ed ure ab ove.
8. If
 No,  D i d  Te s t  # 2 3 8  ( EXP- I N TF)  o r Te s t  # 9 8 9  ( SN I )  f a il ? 
a. If 
Ye s, replac e the lig htwave transc eivers and  fib er-op tic  c ab le and  
g o b ac k to Step  12 in the ‘‘
Gather information’’ p roc edure ab ove. 
b . The faulted  c omp onent c an b e further isolated  by using  information 
in the ‘‘
Loop b ac k tests’’ sec tion later in this c hap ter.
c . If a fib er out of frame c ond ition exists and  lig htwave transc eivers 
are used , c hec k that b oth lig htwave transc eivers are of the same 
type, (9823A or 9823B). If they are not b oth the same, rep lac e one 
of the lig htwave transc eivers so that they matc h. 9823A is used  for 
d istanc es up  to 4900 feet (1493 m) and  9823B is used  for distanc es 
up  to 25,000 feet (7620 m).
9. If No, Is a DS1 CONV ad ministered on the fib er-link? 
a. If 
No and  the p rob lem is still p resent, follow normal esc alation 
p roc ed ures.
b . If 
Ye s, is there an SNI-BD 513 alarmed  error (display errors
 for 
category pnc
)? If yes, replace cabling between the SNI circuit pack 
and  the DS1C c irc uit p ac k. 
c . If the alarm p ersists, first attempt the manual loop b ac k p roc ed ure 
b elow, then rep lac e the DS1C and  the SNI c irc uit p ac ks and  g o 
b ac k to Step  12 in the ‘‘
Gather information’’ p roc ed ure ab ove.
10. If 
No,  if  t h e  c o n n e c t e d  c i rc u it  p a c k  is  a n  EXP-I N TF,  d i d  Te s t  # 2 3 8  f a i l? 
a. If 
Ye s,  re p l a c e  c a b l in g  b e t w e e n  t h e  EXP- I N TF c irc u i t  p a c k a n d  t h e  
DS1C c irc uit p ac k. If Test #238 c ontinues to fail, rep lac e the DS1C 
and  the EI c irc uit p ac ks and  g o b ac k to Step  12 in the ‘‘
Gather 
information’’ p roc ed ure ab ove.
11. If 
No, b usyout the c irc uit p ac k (busyout board UUCSS
).
12. Test the c irc uit p ac k (test board UUCSS long) 
for b oth DS1C c irc uit 
p ac ks and  note all test failures and  aborts.
NOTE:
Test #790 fails with Error Cod e 1 when in Survive mod e. 
						

							DEFINITY® Enterprise Communications Server Release 7 Installation and 
Maintenance for Survivable Remote EPN  555-233-102  Issue 2
June 1999
SREPN Maintenance 
2-30 Fault isolation procedures 
2
13. Did  the test return Board not inserted 
for the near-end  c irc uit p ac k 
(nearest the SPE),  o r  f o r  t h e  f a r- e n d  c irc u i t  p a c k i n  a  s im p l e x  PN C ?
a.  If 
Ye s, replac e the c abling  b etween the DS1C c irc uit p ac k and  the 
SNI or EI c irc uit p ac k.
b . Wait 1 minute and  retest.
c . If the b oard  is still not inserted , rep lac e the DS1C c irc uit p ac k and  
the EI or SNI c onnec ted  to it and  Go b ac k to Step  12 in the ‘‘
Gather 
information’’ p roc ed ure ab ove.
14. If 
No, visually c hec k to see if any CSU d evic es are loop ed  b ac k.
a. Busyout the c irc uit p ac k (busyout board UUCSS
).
b. Test for external loopback (test ds1-facility UUCSS external-loop
) 
for eac h DS1 fac ility.
NOTE:
Many tests p ass if the system is in Survive mod e.
15. Did  Test #788 p ass and  Test #789 fail? 
a. If yes, rep lac e the DS1C and  lig htwave transc eiver (if p resent) at 
the other end  of the DS1C c omplex. (See Figure 2-18
)
b . Go b ac k to Step  12 in the ‘‘
Gather information’’ p roc ed ure ab ove.
16. If 
No, d id  Test #788 fail or ab ort and  Test #789 fail or abort? 
a. If 
Ye s, enter test ds1-facility UUCSS long
 for eac h ad ministered  
and  eq uip p ed DS1 fac ility.
NOTE:
If the Switc h Nod e Interfac e (SNI) b oard ’s yellow LED is fast flashing  
(0.1 sec  on/0.1 sec  off), it c an ind ic ate a p rob lem with the fib er from 
the SNI b oard  to the SREPN. For more d etailed  information, refer to 
the SNI-BD Maintenanc e Ob jec t in Chap ter 9 of 
DEFINITY ECS 
Release 7 Maintenanc e for R7r
.
Loopback tests
The following section d escrib es loop b ack tests:
n‘‘Fib er d irec t-c onnec t system’’
n‘‘DS1 CONV system’’
n‘‘Manual loop bac k p roc ed ure’’ 
						

							DEFINITY® Enterprise Communications Server Release 7 Installation and 
Maintenance for Survivable Remote EPN  555-233-102  Issue 2
June 1999
SREPN Maintenance 
2-31 Fault isolation procedures 
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Fiber direct-connect system
Fi g u re  2 - 1 7 shows the loopbacks performed on the SNI and EI circ uit packs.
Figure 2-17. Fiber fault isolation tests for SNI and EI circuit packs
Fi g u re  2 - 1 7
 shows that:
nTest #756 rep orts the result of the off-b oard  loop b ac k
nTest #757 rep orts the result of the on-board  loop b ac k
nTest #756 and  Test #757 c an run ind ivid ually or as p art of the test board 
UUCSS
 long
 c ommand  for an SNI c irc uit p ac k.
nTest #242 c an b e run as p art of the test board UUCSS long
 c ommand  for 
an Exp ansion Interfac e c irc uit p ac k. In ad d ition to testing  on-board  
c omp onents, this test is helpful for isolating  p rob lems 
between a c irc uit 
p ac k and  the lig htwave transc eiver
.
The loop b ac k shown in this d iag ram shows only part what Test #242 d oes. 
If no lig htwave transc eiver is c onnec ted  to the Exp ansion Interfac e c irc uit 
p ac k, an on-b oard  loop b ac k is p erformed on the Exp ansion Interfac e 
c irc uit p ac k. For more information about Test #242, see the EXP-INTF 
Maintenanc e Ob jec t in Chap ter 9 of 
DEFINITY ECS Release 7 
Maintenanc e for R7r
.
cydf058 RPY 022499
TN753
switch
node
interfaceTN570C
expansion
interface Te s t  #
757Te s t  #
756Te s t  #
242Tone
clock
Tone
detector
DEFINITY
ECSSREPN
TDM
BUS
Fiber optic
cable Back of
cabinetBack of
cabinet
Lightwave
transceivers Test #989
(framing)Test #989
(framing) 
						

							DEFINITY® Enterprise Communications Server Release 7 Installation and 
Maintenance for Survivable Remote EPN  555-233-102  Issue 2
June 1999
SREPN Maintenance 
2-32 Fault isolation procedures 
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DS1 CONV system
Ad d itional DS1-CONV loop b ac k tests c an further isolate the p rob lem as shown in 
Fi g u re  2 - 1 8
.
Figure 2-18. DS1 CONV loopback tests
Fi g u re  2 - 1 8
 shows that:
nIf Test #799 fails at LB1, the p rob lem is with DS1C #1, CSU #1, or the 
c onnec tions b etween them.
nIf Test #799 p asses at LB1 and  fails at LB2, the p rob lem is with CSU #1.
nIf Test #799 p asses at LB1 and  at LB2, the p rob lem is with the DS1 fac ility, 
CSU #2, c onnec tions to CSU #2, or DS1C #2.
nFor more information about loopb ac k Tests #788 and  #789 (isolates the 
lig htwave transc eiver), see the DS1 CONV-BD sec tion in Chap ter 9 of 
DEFINITY ECS Release 7 Maintenanc e for R7r.
Manual loopback procedure
Lightwave transc eivers are not isolated  as p art of Exp ansion Interfac e or 
DS1-CONV c irc uit p ac k tests. For examp le, when the Exp ansion Interfac e 
Lightwave Transc eiver Loop around  Test (#242) and  the Exp ansion Interfac e 
Loc al Loop Around  Test #240 p ass, this ind ic ates that the Exp ansion Interfac e 
c irc uit p ac k is func tioning  prop erly, b ut it d oes not verify that the op tic al p ortion of 
the lig htwave transc eiver is func tioning  p rop erly.
To b eing  the manual loop bac k p roc ed ure:
1. If d up lic ate Exp ansion Interfac e Links are availab le, issue the test board 
UUCSS
 c ommand  on the stand by Exp ansion Interfac e c irc uit p ac ks on 
b oth end s of fib er. 
cydf059 KLC 022499
DS1C DS1CCSU CSU
DEFINITY
ECS SREPN
Lightwave
transceiverTest #797 loops at
internal interface
for DS1 facility
Test #789
loops here
DS1 facilityTest #799
LB2Test #799
LB1Tests 780,
788, 797
799 start
here 
						

							DEFINITY® Enterprise Communications Server Release 7 Installation and 
Maintenance for Survivable Remote EPN  555-233-102  Issue 2
June 1999
SREPN Maintenance 
2-33 Fault isolation procedures 
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2. If this test p asses from b oth sid es, b ut other tests fail, suc h as Test #241, 
this c ond ition ind ic ates either a faulty lig htwave transc eiver or a faulty fib er 
c ab le. To d etermine if either a lig htwave transc eiver or the fib er itself has 
failed, exec ute the Exp ansion Interfac e ‘‘
Manual loop b ac k proc ed ure’’ 
described below.
NOTE:
This test c an only b e run from b oth Exp ansion Interfac e c irc uit p ac ks 
if they are the Stand by pair, and  if the Ac tive p air is working  p rop erly.
Use this p roc ed ure when
nUsing  DS1 CONV fac ilities and  a 9823A lig htwave transc eiver.
nAn EI/SNI c irc uit p ac k c annot b e tested  b y software. For examp le, an EI 
c irc uit p ac k loc ated  in an EPN that is d own c annot b e tested . This c an 
oc c ur when c ommunic ation b etween the switc h nod e c arrier and  the SPE 
is d own.
!WARNING:
This procedure is destructive; all calls are broken down.
To b eg in the manual loop bac k p roc ed ure:
1. Run  the c onfig uration aud it test (#759) on SNI c irc uit pac ks where 
possible with test board UUCSS s
. 
2. Run the Proc essor Route Aud it Test (#760) with the test board UUCSS 
long
 c ommand  for the ac tive SNC in the switc h nod e c arrier. If the ac tive 
SNC is not inserted , Test #760 c an b e run with test hardware-group pnc 
a-pnc
 or b-pnc
.
3. Determine whether more than one SNI is unab le to c ommunic ate with 
software. Verify SNI and  SNC c irc uit p ac k insertion with the list 
configuration carrier UUC
 c ommand  and  c hec k for SNI and  SNC 
insertion for every ad ministered  switc h nod e c arrier.
4. If all of the SNIs and  SNCs are not inserted  (No Board
 d isp lays for eac h 
b oard) in the entire PNC (either the a-p nc  or the b -p nc ), then the link 
b etween the PPN EI (on the PNC where SNI and  SNC c irc uit p ac ks did  not 
insert) and  the c onnec ted  SNI is not func tioning  prop erly.
a. Run the test board UUCSS
 c ommand on the PPN EI and  fix any 
p rob lems found .
b . Perform the manual loop b ac k p roc ed ure for the PPN EI.
c . Perform the manual loop b ac k p roc ed ure for the SNI c onnec ted  to 
t h e  PPN  EI .
d . Rep lac e the ac tive SNC. 
						

							DEFINITY® Enterprise Communications Server Release 7 Installation and 
Maintenance for Survivable Remote EPN  555-233-102  Issue 2
June 1999
SREPN Maintenance 
2-34 Fault isolation procedures 
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5. If the system has a two-level switc h node c arrier c onfig uration, that is (all 
must ap p ly)
nSNI-SNI fib er links exist
nThe SNIs and  SNCs in the sec ond  switc h nod e c arrier only (the 
switc h nod e c arrier that has no SNI c onnec ted  to the PPN EI) are 
not inserted
nAt least two SNI-SNI fib er links exist
Then perform the following steps:
a. Run the test board UUCSS long
 c ommand  on the SNIs in the first 
switc h nod e c arrier that are c onnec ted to SNIs in the sec ond  switc h 
nod e c arrier and  fix any p roblems found .
b . Rep lac e the ac tive SNC.
c . Perform the manual loop b ac k p roc ed ure for the SNIs in the sec ond  
switc h nod e c arrier that are c onnec ted  to SNIs in the first switc h 
nod e c arrier.
6. If software is unab le to c ommunic ate with an EPN EI, but c an 
c ommunic ate with the c onnec ted  SNI:
a. Run the test board UUCSS long
 c ommand  on the c onnec ted SNI 
and  fix any p rob lems found .
b . Busyout the EI or SNI c irc uit p ac k (busyout board UUCSS
).
7. Disc onnec t the transmit and  rec eive fib er p air from the fib er c onnec tors on 
the b ac k of the c ab inet.
NOTE:
Note whic h is the transmit and  whic h is the rec eive sid e for 
p roper re-c onnec tion at the end  of this p roc ed ure.