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 
2-35 Fault isolation procedures 
2
8. Connec t the transmit and  rec eive c ab les tog ether using  the fib er op tic  
c oup ler (Comc od e 407643014, p rovided  in Maintenanc e Kit #30) to c reate 
a loop  as shown in Fig ure 2-19
.
Figure 2-19. Manual loopback with fiber optic coupling
9. Go to the front of the c ab inet and  inspec t the yellow LED.
a. If the yellow LED flashes on at a rate of onc e p er sec ond , the 
Exp ansion Interfac e or Switc h Nod e Interfac e c irc uit p ac k or 
transc eiver should  b e rep lac ed .
b . If the yellow LED flashes on at a rate of 5 times p er sec ond , the  
Exp ansion Interfac e or Switc h Nod e Interfac e c irc uit p ac k or the 
lig htwave transc eiver may need  rep lac ement. This c ond ition may 
also b e d ue to a faulty system c loc k on the network c ontaining  the 
Exp ansion Interfac e c irc uit pac k or in the switc h nod e c arrier 
containing the SNI.
c . If the yellow LED was b linking  b efore starting  this proc ed ure and  
the yellow LED is not b linking now, this c irc uit p ac k (Exp ansion 
Interfac e or Switc h Nod e Interfac e) and  the lig htwave transc eiver 
are func tioning  p rop erly. Figure Notes
1. Fib er op tic  coup ling  (Comcod e 407643014)
RX
RX TX
TX
cydfloop LJK 032398
Back of cabinet
1 
						

							DEFINITY® Enterprise Communications Server Release 7 Installation and 
Maintenance for Survivable Remote EPN  555-233-102  Issue 2
June 1999
SREPN Maintenance 
2-36 Fault isolation procedures 
2
10. Rep lac e faulty c omp onent(s) and rec onnec t the orig inal fib er. Be sure to 
rec onnec t the fib ers p rop erly as noted  in Step  7 in this  ‘‘
Manual loop bac k 
p roc ed ure’’ section.
11. Release the Exp ansion Interfac e c irc uit p ac k or Switc h Nod e Interfac e 
c irc uit p ac k (release board UUCSS
).
12. If p rob lems still exist after the Manual Loop b ac k Proc edure ind ic ates that 
b oth Exp ansion Interfac e c irc uit p ac ks and  b oth lig htwave transc eivers 
are healthy, verify that eac h op tic al fib er is c onnec ted  to a transmitter at 
one end  and  a rec eiver at the other.
DS1 interface cable pinout
Table 2-11 shows the p in assig nments for the c ab le c onnec ting  the TN1654 DS1 
CONV c irc uit p ac k to DS1 fac ilities. 
						

							DEFINITY® Enterprise Communications Server Release 7 Installation and 
Maintenance for Survivable Remote EPN  555-233-102  Issue 2
June 1999
SREPN Maintenance 
2-37 Fault isolation procedures 
2
Table 2-11. DS1 Interface Cable Connectors 
Lead Desig.50-Pin 
Connector 
Pin #15-Pin 
Connector 
Color Pin Color
Plug 04
Fac ility D Line In LID 38 W-BL 11 W-BL
Fac ility D Line In LID* 13 BL-W 03 BL-W
Fac ility D Line Out LOD 39 W-O 09 W-O
Fac ility D Line Out LOD* 14 O-W 01 O-W
Plug 03
Fac ility C Line In LIC 41 W-G 11 W-G
Fac ility C Line In LIC* 16 G-W 03 G-W
Fac ility C Line Out LOC 42 W-BR 09 W-BR
Fac ility C Line Out LOC* 17 BR-W 01 BR-W
Plug 02
Fac ility B Line In LIB 44 W-S 11 W-S
Fac ility B Line In LIB* 19 S-W 03 S-W
Fac ility B Line Out LOB 45 R-BL 09 R-BL
Fac ility B Line Out LOB* 20 BL-R 01 BL-R
Plug 01
Fac ility A Line In LIA 47 R-O 11 R-O
Fac ility A Line In LIA* 22 O-R 03 O-R
Fac ility A Line Out LOA 48 R-G 09 R-G
Fac ility A Line Out LOA* 23 G-R 01 G-R
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 
2-38 110 block cross-connect pins 
2
110 block cross-connect pins
Table 2-12. 110 block cross-connect pins
SRP AuxEPN Aux
Amphenol
Pin 
Number ColorCross-
Connect 
Pin 
NumberLead 
Designation
1
1. When the loop b etween Cust A (alarm) and  Cust Rtn (return) c loses, the SRSwitc h c onfigures the SRP into 
Restore mod e, overriding  the fac ep late switc h setting . Closure of the c ustomer alarm relay is c ontrolled  b y 
an SRP SAT c ommand whic h c loses the c ustomer alarm relay on the SRP p roc essor.
Pwr Fail (-48V) is g round ed  when the TN2301 d etec ts that its -48V red und ant p ower is b ad .
Cust A (alarm) - see ab ove.
SRPresent is always g round ed , indic ating  to the TN775C (Maint.) that it is c onnec ted  in a SREPN.
SRAc tive is g enerated  b y TN775C (Maint.) to d isc onnec t links from Release 7r to SRP in Survive mod e.
-48V In/Rtn is inp ut and  return used by DC/DC c onverter for sup p lying red und ant p ower to the op tic al 
transc eivers.
SR Cntrl/Rtn, when ac tive, c onnec ts to the SR Cntrl Rtn signal on the TN775C (Maint.). Loop c losed  - 
TN2301 goes into Survive mod e; loop  op en - TN2301 c annot c ome out of Survive mode without manual or 
remote reset.
Cross-
Connect 
Pin 
Number ColorAmphenol
Pin 
Number
23 G-V 46 Cust Rtn 3 W-O 27
SRP AuxSRP Switch
Amphenol
Pin 
Number ColorCross-
Connect 
Pin 
NumberLead 
DesignationCross-
Connect 
Pin 
Number ColorAmphenol
Pin 
Number
27 W-O 3 Pwr Fail (-48V) 46 G-V 23
48 V-G 45 Cust A 23 BK-O 37
EPN AuxSRP Switch
Amphenol
Pin 
Number ColorCross-
Connect 
Pin 
NumberLead 
DesignationCross-
Connect 
Pin 
Number ColorAmphenol
Pin 
Number
02 O-W 4 Cust Rtn 24 O-BK 12
28 W-G 5 SRPresent 47 V-BR 49
29 W- B R 7 SRA c t i ve 4 8 BR- V 24
46 V-BL 41 -48V Rtn 41 V-BL 46
21 BL-V 42 -48V In 42 BL-V 21
48 V-G 45
2
2. Momentarily short these two lead s on the EPN Aux to verify the d etec tion c irc uit on the TN2301 and  the 
Maintenanc e (TN775C) c irc uit pac k wiring .
SR Cntrl 43 V-O 47
23 G-V 46
2SR Cntrl Rtn 44 O-V 22 
						

							DEFINITY® Enterprise Communications Server Release 7 Installation and 
Maintenance for Survivable Remote EPN  555-233-102  Issue 2
June 1999
SREPN Maintenance 
2-39 Replacing the TN2301 circuit pack 
2
Fi g u re  2 - 2 0 shows the p inout and  c ross-c onnec tions for the SREPN.
Figure 2-20. SREPN pinout and connections
Replacing the TN2301 circuit pack
!CAUTION:
EPN service is interrupted until a replacement TN2301 is installed, powered 
up , and  the EI links restored .
Unseat the circuit pack
1. Power d own the c ab inet b y turning  the p ower switc h off.
2. Attac h an ESD strap  to your wrist. Figure Notes
1. Switc hes to g round  after link failure 
(ap p roximately 3 minutes)2. Momentary c losure after 3 minutes
A-PNC
B-PNC
ABEI
EI
EISRP
TN 2301
SR Switch
Latch
Latch
Reset
TN 790
processor
R6R PPN47SRPresent (V-BR) (W-G) Aux_Alm_3
48
41
42
43
44
24
46
23SRActive (BR-V)
-48v. Rt (BL-V)
SRCnt1 (V-O)
SRCntRt (O-V)
CustRtn (O-BK)
PwrFail (G-V) -48v. (V-BL)5
7
41
42
45
46
4
3 (W-BR) Aux_Alm_4
(V-BL) Grd
(BL-V) -48v.
-48v. (V-G) Ext_Alm
(G-V) Ext_Alm_Rt
(O-W) Grd
(W-O) Aux_Alm_2
Maintenance/Test
TN775C EPN
Aux
EPNAux_Alm_2 (W-O)
Y cable3
46
Ext_Alm_Rt (G-V)
Ext_Alm (V-G) 45CustA (BK-O)
SR Switch
SRP Aux
1
2
iodf001 EWS 111198 
						

							DEFINITY® Enterprise Communications Server Release 7 Installation and 
Maintenance for Survivable Remote EPN  555-233-102  Issue 2
June 1999
SREPN Maintenance 
2-40 Replacing the TN2301 circuit pack 
2
3. Push the latc h p in up ward  to unloc k the loc king  lever.
4. Pull d own on the loc king  lever until the c irc uit p ac k d isc onnec ts from its 
soc ket.
5. Pull the c irc uit pac k just enoug h to b reak c ontac t with the bac kp lane 
c onnec tor, b ut d o not remove it from the c ab inet.
!CAUTION:
Ensure that there is enoug h slac k d rawn from the extra fib er op tic  c ab ling  
from the bottom p an of the c ab inet to c lear the c irc uit p ac k from the c ab inet 
(ap p roximately 18 inc hes or 45.7 c m).
Replace the circuit pack
NOTE:
If the same op tic al transc eivers c an b e reused , then the op tic al 
c onnec tions to the transc eivers d o not have to b e removed. Just remove 
the transc eivers from the old  c irc uit p ac k and  rec onnec t them to the 
c orresp ond ing  c onnec tor p ositions on the rep lac ement c irc uit p ac k.
1. Remove the fib er c onnec tions from eac h transc eiver, 
taking  c are to note to 
whic h transc eiver the c ab les g o and whic h is the transmit (TX) and  rec eive 
(RX) c onnec tions for eac h transc eiver. 
See Fig ure 2-2 1. 
						

							DEFINITY® Enterprise Communications Server Release 7 Installation and 
Maintenance for Survivable Remote EPN  555-233-102  Issue 2
June 1999
SREPN Maintenance 
2-41 Replacing the TN2301 circuit pack 
2
Figure 2-21. Transceivers attached to the TN2301 circuit pack
2. Remove the b rac ket and then the transc eivers from the old  c irc uit p ac k 
and  rep lac e them 
in the id entic al positions on the new TN2301 c irc uit 
pack.
3. Rep lac e the b rac ket over the transc eivers to sec ure them to the b oard . 
4. Feed  the fib er c ab les throug h the slot in the b ac k of the c irc uit p ac k and  
rep lac e the fib er c onnec tions on eac h of the transc eivers. Figure Notes
1. Connec tions from PPN A (lig htwave 
transc eiver typ e must match other end )
2. Connec tions to EPN A
3. Connec tions from PPN B
4. Connec tions to EPN B5. Lig htwave transc eiver (9823A is 
always in this p osition)
6. Fib er op tic  cab le p airs from the 
rear p anel of the SRP c ab inet
ckdf03fo KLC 010899
R
XT
X
R
XT
X
1
2
3
4
5
6
PPN A
EPN A
PPN B
EPN B 
						

							DEFINITY® Enterprise Communications Server Release 7 Installation and 
Maintenance for Survivable Remote EPN  555-233-102  Issue 2
June 1999
SREPN Maintenance 
2-42 Restore from remote location 
2
5. Insert the new c irc uit p ac k, feed ing  the fiber p atc h c ord s to the b ottom 
p an of the c ab inet.
Reseat the circuit pack
1. Reseat the c irc uit pac k into the b ac kp lane c onnec tor.
!WARNING:
Ensure that the fib er c ab les are not b ent or p inc hed  b etween the 
b ac k of the c irc uit p ac k and  the b ac kp lane of the c ab inet.
2. Lift the loc king lever until the p in engag es.
3. Power up  the c ab inet.
Restore from remote location
Th e  restore survivable-remote-link
 c ommand  rec onfig ures the EI link 
c onnec tions to the Release 7r PPN just as if the fac ep late switc h was manually 
set to the RSTR (Restore) p osition. 
NOTE:
The TN2301 fac ep late switc h p osition overrid es the restore 
survivable-remote-link
 c ommand , should  the two c onflic t.
Onc e the c onnec tion to the Release 7r is repaired :
1. Dial in and  log  onto the SRP p roc essor.
2. Typ e the restore survivable-remote-link
 c ommand , whic h c loses the 
relay on the Proc essor c irc uit p ac k.
3. Wait at least 3 minutes while the EPN g oes throug h its c old  restart and  
then c hec k the status of the link c onnec tions with the status health
 
command for 
both
 the Release 7r and the SRP systems to d etermine 
whether the link b etween the Release 7r and  the EPN is up  (Fi g u re  2 - 9
).
When the c onnec tions are up  on b oth sid es (EPN and  Release 7r), the 
system is suc c essfully rec onnec ted . 
						

							DEFINITY® Enterprise Communications Server Release 7 Installation and 
Maintenance for Survivable Remote EPN  555-233-102  Issue 2
June 1999
SREPN Maintenance 
2-43 Restore from remote location 
2
Th e  Tab le 2-13 d esc rib es the c ond itions in whic h the restore from a remote 
loc ation is p ossib le.
Table 2-13.TN2301 switch configuration based on input 
Inputs to Control Logic Modes
Remote 
restoreSurvive 
mode 
requested
1
1. The EPN Maintenance (TN775C) c irc uit p ac k req uests switc hing  to Survive mod e.
Switch 
positionSRP 
power State of SREPN
Not activeNot activeAUTOGoodNormal mod e: EPN c onnected with Release 7r 
PPN
Not activeActiveAUTOGoodSurvive mode: EPN c onnec ted  to SRP 
Not activeDoes not 
matterTESTGoodSurvive mode: EPN c onnec ted  to SRP
ActiveDoes not 
matterTESTGoodSurvive mode: EPN c onnec ted  to SRP
Not activeDoes not 
matterRSTRGoodNormal mod e: EPN connec ted  to Release 7r 
PPN
Not activeDoes not 
matterRSTRBadNormal mod e: EPN c onnected with Release 7r 
PPN
ActiveDoes not 
matterAUTO or
RSTRGoodNormal mod e: EPN connec ted  to Release 7r 
PPN
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 
2-44 System links 
2
System links
The state of a system link is d ep end ent on the state of the various hard ware 
c omp onents that it travels over. The switc h maintains a list of hard ware 
c omp onents over whic h the link travels, c alled  the hard ware p ath. 
For eac h system link there is a c urrent and  a faulted  hard ware p ath as shown in 
Tab le 2-14
.
1. Foc us attention on the 
c urrent hardware path for p rob lems that d o not 
involve a link that is d own.
2. If the link is down, foc us on the 
faulted  hard ware p ath. 
3. If any alarms are p resent, follow the maintenanc e p roc ed ures for the 
alarmed  c omp onents to c lear those alarms first.
Table 2-14. Hardware path data for link repair
Hardware 
pathLink 
statusHardware path 
data present?Errors cleared at 
recovery?
CurrentUp Yes Yes
Down No Yes
Faulted
1
1. Path that the link traversed  when it last went d own.Up Yes
Down Yes
2
2. The time at whic h the faulted p ath was last rec ord ed is p reserved and  is 
ac c essib le throug h the status sys-link loc ation, whic h shows the state of 
b oth the hardware paths (current and  faulted ) and the state of eac h of the 
comp onents in that path, and the list sys-link command s.
No