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 
2-5 SREPN connections 
2
Expansion Interface connections
nTN570C Exp ansion Interfac e (EI) c irc uit p ac ks use either the 9823A 
(multimod e) or the 300A (sing le mod e) transc eivers.
NOTE:
A new SREPN system inc lud es the TN570C EI c irc uit p ac k. Earlier EI 
c irc uit pac ks (for examp le, TN570B) are not sup p orted .
DS1 CONV...

DEFINITY® Enterprise Communications Server Release 7 Installation and 
Maintenance for Survivable Remote EPN  555-233-102  Issue 2
June 1999
SREPN Maintenance 
2-6 SREPN connections 
2
Transfer sequence to Survive mode
Transfer from Normal to Survive mode is automatic  and  is c ontrolled  b y the 
TN775C Maintenanc e b oard . Fi g u re  2 - 3
 shows a schematic of the link switc hing  
within the TN2301 c irc uit p ac k.
Figure 2-3. TN2301 link switching schematic
The transfer seq uenc e to Survive mod...

DEFINITY® Enterprise Communications Server Release 7 Installation and 
Maintenance for Survivable Remote EPN  555-233-102  Issue 2
June 1999
SREPN Maintenance 
2-7 SREPN connections 
2
Tab le 2-3 shows the sequenc e of events to transfer to the Survive mod e, the 
ap p roximate times for eac h event, and  the servic e affec ted  at eac h stag e.
TN2301 (SRSwitch)
The SRSwitc h c irc uit p ac k (TN2301) oc c up ies 6 slots in the SRP c ab inet. Fi g u re  
2-4 shows the fac ep late switc h and  LEDs for...

DEFINITY® Enterprise Communications Server Release 7 Installation and 
Maintenance for Survivable Remote EPN  555-233-102  Issue 2
June 1999
SREPN Maintenance 
2-8 SREPN connections 
2
Figure 2-4. TN2301 faceplate switch and LEDs
Faceplate switch
Tab le 2-4 ind ic ates the 3 p ositions for the fac ep late switc h and  the use for eac h.
Table 2-4. Faceplate switch positions and uses
Label Position Use
RSTR Top Forc es c ontrol to the Release 7r b y switc hing  from Survive mod e 
to Normal mod e
1
1....

DEFINITY® Enterprise Communications Server Release 7 Installation and 
Maintenance for Survivable Remote EPN  555-233-102  Issue 2
June 1999
SREPN Maintenance 
2-9 SREPN connections 
2
SREPN connections
Fi g u re  2 - 5 shows a d etailed view of the rear p anel c onnec tors.
Figure 2-5. SREPN rear panel - detail
scdfsre4 RPY 022398
PI EI
TX S.R.
SW ITCHEPN B EPN APPN B PPN A
TX TX TX
RX RX RX RXAUX
DCE TERM 

DEFINITY® Enterprise Communications Server Release 7 Installation and 
Maintenance for Survivable Remote EPN  555-233-102  Issue 2
June 1999
SREPN Maintenance 
2-10 SREPN connections 
2
Fi g u re  2 - 6 shows the hard ware c onnec tions in the d irec t fib er system.
Figure 2-6. Detailed SRP direct fiber connections Figure Notes:
1. Fib er transmit (TX) and rec eive (RX) 
p airs for A and  B c arriers.
2. SRP AUX B25A 25-p air c ab le; max. 
leng th =  50 ft. (15.25 m):
nMajor SRP p ower failure alarm...

DEFINITY® Enterprise Communications Server Release 7 Installation and 
Maintenance for Survivable Remote EPN  555-233-102  Issue 2
June 1999
SREPN Maintenance 
2-11 SREPN connections 
2
Fi g u re  2 - 7 shows the hard ware c onnec tions in the DS1-CONV system.
Figure 2-7. Detailed SRP DS1-CONV connections  Figure Notes:
1. Fib er transmit (TX) and rec eive (RX) 
p airs for A and  B c arriers.
2. SRP AUX B25A 25-p air c ab le; max. 
leng th =  50 ft. (15.25m):
nMajor SRP p ower failure alarm lead
nRemote...

DEFINITY® Enterprise Communications Server Release 7 Installation and 
Maintenance for Survivable Remote EPN  555-233-102  Issue 2
June 1999
SREPN Maintenance 
2-12 Maintenance procedure 
2
Maintenance procedure
Sinc e Survive mod e is invoked  bec ause of a link failure b etween the Release 7r 
and  an EPN, the maintenanc e strateg y is to:
1.‘‘
Check system status’’
2.‘‘Rep air the link c onnec tion’’
3.‘‘Rec onnec t the Release 7r to the EPN’’
4.‘‘Post-reset check’’
The final sec tions of this c hap...

DEFINITY® Enterprise Communications Server Release 7 Installation and 
Maintenance for Survivable Remote EPN  555-233-102  Issue 2
June 1999
SREPN Maintenance 
2-13 Maintenance procedure 
2
Expansion Interface (TN570C) LED interpretation
The Exp ansion Interfac e c irc uit p ac k has red , g reen, and  yellow LEDs. The red  
and  g reen LEDs show the stand ard  c ond itions:
nRed  ind ic ates an alarm c ond ition
nGreen ind ic ates maintenanc e testing  in p rog ress
The yellow LED is used  to p rovid e...

DEFINITY® Enterprise Communications Server Release 7 Installation and 
Maintenance for Survivable Remote EPN  555-233-102  Issue 2
June 1999
SREPN Maintenance 
2-14 Maintenance procedure 
2
Table 2-6. Expansion Interface circuit pack 
Yellow LED Flashing States 
Condition LED On LED Off
Fib er Out-of-Frame
1
1. This flashing  state c orresp onds to Error Codes 769 and  770 from the 
Hard ware Error Log and ind icates a failure of Test #238. These error cod es 
are usually ac c ompanied  by Error Cod e...