Lucent Technologies DEFINITY Enterprise Communication Server Release 8.2 Installation For Adjuncts And Peripherals Manual

							DEFINITY ECS Release 8.2
Installation for Adjuncts and Peripherals  555-233-116  Issue 1
April 2000
DS1/T1 CPE Loopback Jack 
119 Loopback Testing with a Smart Jack 
9
5. End  the test. Enter 
test DS1-loop 
location end cpe-loopback-jack-test
6. Wait ab out 30 sec ond s for the DS1 to reframe on the inc oming  sig nal and 
c lear DS1 fac ility alarms. Condition Solution
The value of the Bit-error count
 field  is 
g reater than 1Rep lac e the ICSU, and  retest.
The value of the Bit-error count
 field is still 
g reater than 1
 after you rep lac e the ICSU.Rep lac e the DS1 c irc uit p ac k, and  retest.
The value of the Bit-error count
 field  is 1
The test p assed .
Condition Solution
Loop bac k termination fails 
with an error c od e of 1313. The sp an is still loop ed somewhere, p ossib ly at the 
loop b ac k jac k, at the ICSU, or somewhere in the 
network.
The red  LED on the loop b ac k 
jac k is on.  Rep lac e the ICSU, and  re-run the test.
Loop bac k termination still 
fails.Replace the DS1 circ uit pack, and repeat the test
The DS1 c annot frame on the 
inc oming  sp an’s sig nal after 
the loopback jack power 
down. There is something  wrong  with the rec eive sig nal into the 
loop b ac k jac k from the d umb b loc k or the smart jac k. 
The sp an failed  the servic e 
provider’s loopback test.The p rob lem is in the servic e p rovid er’s network. 
The servic e p rovider 
suc c essfully loop  tested  the 
sp an, up to the smart jac k.The wiring  between the loop b ac k jac k and  the smart jac k 
is susp ec t.  Test, and make rep airs, as need ed .
You c annot loc ate and  rep air 
the p rob lem in the time 
availab le and  must termnate 
the test.The test will not terminate normally in the ab senc e of a 
g ood  framing  sig nal. You have to reset the c irc uit p ac k. 
En t e r  
reset board 
UUCSS 
where 
UU is the c ab inet numb er, C is the  c arrier 
numb er, and  
SS is the slot numb er of the DS1 b oard .
The test terminated  normally. Proc eed  with ‘‘Restoring  DS1 ad ministration’’
, below. 
						

							DEFINITY ECS Release 8.2
Installation for Adjuncts and Peripherals  555-233-116  Issue 1
April 2000
DS1/T1 CPE Loopback Jack 
120 Loopback Testing with a Smart Jack 
9
Restoring DS1 administration
1. At the manag ement terminal, op en the DS1 ad ministration form. Enter 
change DS1 
UUCSS
where UU is the c abinet numb er, C is the  c arrier number, and  SS is the 
slot number of the DS1 b oard .
2. Chang e to p ag e 2 of the DS1 ad ministration form. 
3. Change the value of the TX LBO
 field  to the orig inal value that you wrote 
d own when you were ‘‘Ad ministering  the DS1 for the test’’ on p ag e 116
. 
4. Press 
EN TER to make the c hang es, CANCEL to q uit without c hang es.
Releasing the DS1 circuit pack
1. Release the DS1 c irc uit pack. From the management terminal, enter 
release board 
UUCSS
where UU is the c abinet numb er, C is the  c arrier number, and  SS is the 
slot number of the DS1 b oard . 
2. Leave the loop b ac k jac k in p lac e.
Testing the DS1 Span from the Smart Jack to the 
Network Interface Termination or Fiber 
Multiplexer (MUX)
1. Have the servic e p rovid er run a smart-jac k loop b ac k test ag ainst the 
network interfac e wiring  that links the smart jac k to the CO (Sec tion 3 in 
Fi g u re  3 4
). 
2. If the tests fails, there is a p rob lem on the network sid e. Have the servic e 
p rovid er c orrec t it.
Testing the DS1 Span from the Loopback Jack to 
the Smart Jack
Test the short leng th of c ustomer p remises wiring  b etween the loopb ac k jac k and  
the smart jac k (Sec tion 2 in the following  3 fig ures) using  a loop b ac k that 
overlaps  this sec tion of the sp an. 
n
Have the DS1 servic e p rovid er at the CO end  run a loc al ICSU line 
loopback test.
n
Have the DS1 servic e p rovid er at the CO end  run a loc al DS1 p ayload  
loopback test. 
n
Run a far-end  ICSU line loopb ac k, using  the proc ed ure below.  
						

							DEFINITY ECS Release 8.2
Installation for Adjuncts and Peripherals  555-233-116  Issue 1
April 2000
DS1/T1 CPE Loopback Jack 
121 Loopback Testing with a Smart Jack 
9
NOTE:
This test c annot isolate the p roblem if there are p roblems in 
the wiring  b etween the far-end CO and  the far-end  ICSU. You 
must c oord inate this test with the DS1 servic e p rovider. 
1. From the manag ement terminal,  enter 
test DS1-loop 
UUCSS far-csu-loopback-test-begin
 
where 
UU is the c abinet numb er,C is the  carrier number, and SS is 
the slot numb er of the DS1 board . 
2. Examine the b it-eror c ounts, as in ‘‘Testing the integrity of data sent 
over the loop ’’ on p ag e 117. 
3. Terminate the test. Enter 
test DS1-loop 
location end-loopback/span-test
. 
3. If the tests fails and  the there were no p rob lems ‘‘Testing the DS1 Span 
from the ICSU to the Loop b ac k Jac k’’ or ‘‘Testing  the DS1 Sp an from the 
Smart Jac k to the Network Interfac e Termination or Fib er Multip lexer 
(MUX)’’, there is a p rob lem b etween the loop b ac k jac k to the smart jac k. 
Work with the servic e p rovider to isolate the fault.
Figure 34. Network Interface at Smart Jack1. Span section 1
2. Span section 2
3. Span section 3
4. 120A2 (or later) ICSU
5. RJ-48 to network interfac e (up to 1000 ft [ 305 m] )6. Loop b ac k jac k
7. Network interfac e smart jac k
8. Interfac e termination or fib er 
multip lexer (MUX)
9. Central offic e 
						

							DEFINITY ECS Release 8.2
Installation for Adjuncts and Peripherals  555-233-116  Issue 1
April 2000
DS1/T1 CPE Loopback Jack 
122 Loopback Testing with a Smart Jack 
9
Figure 35. Network Interface at Extended Demarcation Point (Smart Jack Inaccessible)1. Sp an sec tion 1
2. Sp an sec tion 2
3. Sp an sec tion 3
4. 120A2 (or later) ICSU
5. RJ-48 to network interfac e (up  to 1000 ft 
[305 m] )6. Loop b ac k jac k
7. Dumb  b loc k (extend ed  d emarc ation)
8. Network interfac e smart jac k
9. Interfac e termination or fib er 
multip lexer (MUX)
10. Central offic e 
						

							DEFINITY ECS Release 8.2
Installation for Adjuncts and Peripherals  555-233-116  Issue 1
April 2000
DS1/T1 CPE Loopback Jack 
123 Loopback Testing Without a Smart Jack 
9
Figure 36. Network Interface at Extended Demarcation Point (Smart Jack Accessible)
Loopback Testing Without a Smart 
Jack
When the loop b ac k jac k is ad ded  to a span that d oes not c ontain a smart jac k, 
the sp an is d ivid ed  into 2 sec tions: from the ICSU to the loop b ac k jac k and  from 
the loop b ac k jac k to the c entral offic e (CO). Sec tion 2 inc lud es the short c ab le 
from the loop b ac k jac k to the d umb  b loc k d emarc ation p oint (p art of the 
loop b ac k jac k). This c ab le is the only p art of Sec tion 2 that is part of c ustomer 
p remises wiring . It is not c overed  in the loop b ac k jac k’s loop b ac k path. See 
Fi g u re  3 7
 and Fi g u re  3 8. 1. Sp an sec tion 1
2. Sp an sec tion 2
3. Sp an sec tion 3
4. 120A2 (or later) ICSU
5. RJ-48 to network interfac e (up  to 1000 ft 
[ 305 m] )6. Loop b ac k jac k
7. Dumb  b loc k (extend ed d emarc ation)
8. Network interfac e smart jac k
9. Interfac e termination or fib er 
multip lexer (MUX)
10. Central offic e
11. Dumb  b loc k to smart jac k RJ-48 
						

							DEFINITY ECS Release 8.2
Installation for Adjuncts and Peripherals  555-233-116  Issue 1
April 2000
DS1/T1 CPE Loopback Jack 
124 Loopback Testing Without a Smart Jack 
9
Figure 37. Network Interface at “Dumb” Block1. Sp an sec tion 1
2. Sp an sec tion 2
3. 120A2 (or later) ICSU
4. RJ-48 to network interfac e (up to 1000 ft [ 305 m] )5. Loopback jack
6. Dumb b loc k (d emarc ation p oint)
7. Interfac e termination or fib er 
multiplexer (MUX)
8. Central office 
						

							DEFINITY ECS Release 8.2
Installation for Adjuncts and Peripherals  555-233-116  Issue 1
April 2000
DS1/T1 CPE Loopback Jack 
125 Loopback Testing Without a Smart Jack 
9
Figure 38. Network Interface at “Dumb” Block with Repeater Line to Fiber MUX
You are resp onsib le for find ing  and  c orrec ting  p rob lems in the c ustomer wiring  
(sec tion 1 and  the loop b ac k c ab le p ortion of sec tion 2). The DS1 servic e p rovid er 
is resp onsib le for find ing  and  c orrec ting  p rob lems in the majority of sec tion 2. 
Proc eed  as follows.
1. Test c ustomer p remises wiring  from the ICSU to the loop b ac k jac k, as 
d esc rib ed  in the “ DS1 Sp an Test”  sec tion.
2. Test the loop b ac k jac k-to-dumb block and dumb block-to-CO wiring 
(sec tion 2 in Fi g u re  3 7
). This c an b e d one using  a loop bac k that 
“ overlap s”  the sec tion of the sp an. Any of the following loop b ac ks c an d o 
this:
n
The loc al ICSU’s line loop b ac k, whic h the DS1 servic e provid er at 
the CO end  typ ic ally ac tivates, tests, and then d eac tivates.
n
The local DS1 interface’s payload loopback, which the DS1 service 
p rovid er at the CO end  ac tivates and  tests.  1. Sp an sec tion 1
2. Sp an sec tion 2
3. 120A2 (or later) ICSU
4. RJ-48 to network interfac e (up  to 1000 ft [305 m])
5. Loop b ac k jac k6. Dumb b loc k (d emarc ation p oint)
7. Repeater
8. Fiber multip lexer (MUX)
9. Central office 
						

							DEFINITY ECS Release 8.2
Installation for Adjuncts and Peripherals  555-233-116  Issue 1
April 2000
DS1/T1 CPE Loopback Jack 
126 Loopback Testing Without a Smart Jack 
9
n
The far-end  ICSU’s line loop b ac k. Ac tivate this test at the 
manag ement terminal b y entering  test DS1-loop 
location far-csu-
loopback-test-begin
. Terminate this test b y entering  test DS1-loop 
location end-loopback/span-test
. Bit error c ounts are examined  
as desc rib ed  in the “ DS1 Sp an Test”  sec tion. This test only isolates 
p rob lems to Sec tion 2 wiring  if there are no p rob lems in the wiring  
b etween the far-end  CO and  the far-end  ICSU. Coord inate this test 
with the DS1 servic e p rovid er.
Failure of any of the ab ove tests (a, b , or c ) ind ic ate a prob lem in 
Section 2. This could mean bad loopback jack -to-”dumb” block 
c ab ling, b ut is more likely to ind ic ate a p rob lem somewhere 
b etween the “ d umb ”  b loc k and  the CO. This is the resp onsib ility of 
the DS1 service provider.
If the DS1 Sp an Test c onfirms that there are no p rob lems in Sec tion 
1, the tec hnic ian should  p roc eed  as follows to avoid  unnec essary 
dispatch.
1. Id entify and  c ontac t the DS1 servic e p rovid er.
2. Inform the DS1 p rovid er that loop b ac k tests of the CPE 
wiring  to the “ d umb”  b loc k (sec tion 1) showed  no p rob lems.
3. If the far-end  ICSU line loop b ac k test failed, inform the DS1 
provider.
4. Req uest that the DS1 p rovid er p erform a loopb ac k test of 
their p ortion of the Sec tion 2 wiring  b y send ing  someone out 
to loop Sec tion 2 b ac k to the CO at the “ d umb ”  b loc k. 
If this test fails, the p rob lem is in the servic e p rovid er’s 
wiring . 
If the test p asses, the p rob lem is in the c ab le between the 
loop b ac k jac k and  the “ d umb”  b loc k. Rep lac e the loop b ac k 
jac k.
Configurations Using Fiber Multiplexers
Use the loop b ac k jac k when c ustomer p remises DS1 wiring  c onnec ts to an on-
site fib er multip lexer (MUX) and  allows wiring  to the network interfac e p oint on 
the MUX to b e remotely tested . This req uires that ICSUs b e used  on DS1 wiring  
to the MUX.
Fiber MUXs c an take the p lac e of Interfac e termination feed s as shown in Fi g u re  
34, Fi g u re  3 5, Fig ure 36, and Fi g u re  3 7. Test these sp ans using  the same 
p roc ed ures as metallic  sp ans. Note the following  p oints:
1. Fiber MUXs may have loop b ac k c ap ab ilities that c an the servic e p rovid er 
c an ac tivate from the CO end. These may loop  the signal b ac k to the CO 
or b ac k to the DS1 b oard . If the MUX p rovid es the eq uivalent of a line  
						

							DEFINITY ECS Release 8.2
Installation for Adjuncts and Peripherals  555-233-116  Issue 1
April 2000
DS1/T1 CPE Loopback Jack 
127 Loopback Testing Without a Smart Jack 
9
loop b ac k on the “ p rob lem”  DS1 fac ility, ac tivate it after a suc c essful 
loop b ac k jac k test, and  use it to isolate p rob lems to the wiring  b etween 
the loop b ac k jac k and the MUX.
2. Be aware that there are installations that use rep eatered  metallic  lines 
b etween the MUX and  the “ d umb ”  b loc k. These lines req uire DC power for 
the rep eaters and  this DC p ower is p resent at the “ d umb ”  b loc k interfac e 
to the CPE eq uip ment. A loopb ac k jac k is req uired  in this c onfig uration to 
p rop erly isolate and  terminate the DC p ower.
To c hec k for the p resenc e of DC, make the following  4 measurements at the 
network interfac e jac k:
1. From transmit tip  (T, Pin 5) to rec eive tip  (T1, Pin 2)
2. From transmit ring  (R, Pin 4) to rec eive ring  (R1, Pin 4)
3. From transmit tip  (T, Pin 5) to transmit ring  (R, Pin 4)
4. From rec eive tip (T1, Pin 2) to rec eive ring  (R1, Pin 4)
All measurements should  read  0 (zero) volts DC. For p in numb ers and  p in 
designations, refer to Integ rated  Channel Servic e Unit (ICSU) Installation and  
Operation.
Operating Characteristics
If a TN464F or TN767E and  a 120A2 were installed in a system running  pre-
DEFINITY ECS, V3 software and  the software is later up g rad ed  to DEFINITY ECS, 
V3 Release 3 or later, remove and  re-install the DS1 c irc uit pac k so that the ICSU 
ad ministration field s will ap p ear on the DS1 ad ministration sc reen. 
						

							DEFINITY ECS Release 8.2
Installation for Adjuncts and Peripherals  555-233-116  Issue 1
April 2000
DS1/T1 CPE Loopback Jack 
128 Loopback Testing Without a Smart Jack 
9