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...

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...

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...

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...

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...

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....

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...

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...

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...

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...