Qualification Test
Report 501-545
05Jan07 Rev B
MT-RJ Patch Panel and Outlet Jacks (Standard, XG, SECURE and|SECURE XG)|
©2007 Tyco Electronics Corporation
Harrisburg, PA
All International Rights Reserved
* Trademark
| Indicates change 1 of 8
LOC B
1. INTRODUCTION
1.1. Purpose
Testing was performed on T y c o E lectroni c s MT - RJ J ac k , 39 mm , multi mode, S tandard, XG c ompatible|and MT- RJ S E CURE fiber opti c c onnec tors to deter mine t heir conformance t o the requi r ements of|Product Specificat ion 108-1832, Revision D, whic h meet s the Optical Fiber Cabli ng Component s|Standar d TIA /EIA - 568- B .3
1.2. Scope
This report c overs the optic al, environmental, and mechanical perfor mance of MT- RJ J ac k , 39 mm ,|m ult imode fiber optic c onnec tors, i n the fol lowing configurations: S tandard, XG and M T-RJ SE CURE .|Al l connec tors were manufactured by T y c o E lectroni c s, Fi ber Optic Busi ness Unit . Testing was|performed bet ween 21Oct02 and 01Mar05. The test fi le numbers for this testing are B034072-006|B041976-004, A 285- 005 and B 059794- 002.|
1.3. Conclusion
The MT-RJ J ac k , 39 m m, multi mode Standard fiber opt ic connec tors, listed in paragr aph 1.5, (Test|Groups 1-4), meet t he opti c al, environmental, and mec hanical performanc e r equirement s of Produc t|Specifi c ati on 108- 1832, Revision D and the Opt ical Fiber Cabli ng Components Standard T IA/ E IA-568-|B.3.
The MT-RJ J ac k , 39 m m, multi mode, S tandard fiber opt ic connec tors terminated to 250
:
m c oated|fi ber , listed in paragraph 1.5 (Test Group 5), m eet the optic al and mechanical performance|requi r ements of P r oduc t Specificat ion 108-1832, Revision D and t he Optical Fiber Cabling|Com ponents Standard TIA/EI A - 568- B .3. E nvironmental perfor mance is assum ed to be qualified by|simi larity to the standar d pr oduc t terminated to 900
:
m ti ght buffered fiber.|
The MT-RJ J ac k , 39 m m, multi mode, XG c ompatible fiber opt ic connec tors, listed in paragr aph 1.5|(Test G r oup 6) , meet t he opti c al perfor mance r equirement s of Pr oduc t Specification 108-1832,|Revi si on D and the Opti c al Fiber Cabli ng Components Standard T IA/ E IA-568-B .3. E nvironmental and|m ec hanical perfor manc e ar e assumed to be qualified by simil ar ity to the standar d pr oduc t line.|
The MT-RJ J ac k , 39 m m, multi mode, secure fiber opti c c onnec tors, l isted in paragraph 1. 5 ( Test|Group 7) , were subj ec ted to optic al t ests and a subset of the mechanical tests f r om Pr oduc t|Specifi c ati on 108- 1832, Revision D and the Opt ical Fiber Cabli ng Components Standard|TI A /EI A - 568- B .3. Pr oduc t meets performanc e r equirement s for t hose tests perfor med. P er formance|from the environment al tests and remaining mec hanical tests i s assumed to be quali fied by si mil ar it y|to t he standar d pr oduc t l ine. The following addit ional k ey ing configurations/c olors are assumed t o be|qualified by simil ar it y to the parts tested.|
MT- RJ S E CURE J ac k s| MT- RJ S E CURE P lugs|1588493-2 (Yellow)| 1588493-6 (Aqua)|| 1918356-2 (Yellow)|1918356-6 (Aqua)|1588493-3 (G r een)| 1588493-8 (Violet)|| 1918356-3 (G r een)|1918356-8 (Violet)|1588493-4 (Blue)| 1588493-9 (O r ange)|| 1918356-4 (Blue)|1918356-9 (O r ange)|1588493-5 (Rose)| 1-1588493-0 (S lat e)|| 1918356-5 (Rose)|1-1918356-0 (S lat e)|
501-545
Rev B 2 of 8
1.4. Product Descri ption
The T y c o E lectroni c s MT - RJ J ac k , 39 mm fi ber optic c onnec tors are fi eld installable m ult imode 2-fiber|c onnec tors that ar e used i n data communi c ation and tel ec ommunications networks and equipment .
The MT-RJ S E CURE pr oduc t line is avai lable in ten keys and ten c olors - four standar d c olors and six|additional c olors. MT-RJ S E CURE pr oduc t provides assured safety and pr otect ion agai nst unwanted|intrusion. The chanc e of impr oper inter c onnec ti ons between networks can be m inim ized when m ultiple|networks in a common area ar e segregat ed by c olors. Onl y plugs and jack s of t he same col or will|m ate, and none of the MT - RJ S E CURE pr oduc ts will mate with the standard versi ons.|
1.5. Test Spec imens
Test speci mens were manufac tured using nor mal producti on means. Spec imens consisted of t he jack|assemblies and the foll owing suppl ies outl ined below.
Test Group 123 4 5 6|7|Fiber size : (
:
m/
:
m ) 50/125 62.5/125 50/125 50/125|50-125|Cabl e type for jack te rmina tion|(recei ve end) 900
:
m
Ti ght Buffe r 900
:
m
Ti ght Buffe r 250
:
m
Coated Fiber 250
:
m|Coated Fiber|900
:
m|Ti ght Buffe r|
MT-RJ Plug Cable Assembly PN 1-1278128-0 1-1278032-0 1278128-3|1-1278873-0|1-1828264-0|
MT-RJ Jack Module Assembly PN 1588495-2 1588495-1 1-1374395-1 1-1374395-3
|(XG)|1588493-1 (red)|1588493-7 (brown)|MT-RJ SECURE jack|
MT-RJ Conne ctor Kit PN|see Note (a)|6278750-1|1918356-1 (red)|1918356-7 (brown)|MT-RJ SECURE plug|Test specime ns required 8 8 8 8 8 15|8 see Note (b)|Control cable required 1 0 0 1 0 0|0|
(a) MT- RJ c onnec tor kit par t numbers were used in the m anufactur e of plug c able|NOTE assembli es l isted above.|(b) Two color s were tested to r epr esent the MT - RJ S E CURE pr oduc t line. The test gr oup|quantity of 8 specimens consisted of 4 each fr om t he par t numbers shown. An MT - RJ|SECURE plug and an MT-RJ SE CURE jack were mated to form 8 connector pairs.|
501-545
Rev B 3 of 8
1.6. Quali ficati on Test Sequence
Test or E xamination Test G r oups (a)
123456| 7| Test Sequenc e ( b)
Vi sual and mec hanical i nspect ion 111111| 1| Attenuation (insertion l oss) 222222| 2| Return loss 333333| 3| Low temper ature 4 4|| Hum idity, steady stat e 5 5|| Temperature l ife 6 6|| S trengt h of c oupling m ec hanism 4| 4| Cable r etention, 0 degr ees|54|| Cable r etention, 90 degr ees|65|| Durability 7| 6| Cable flexing 4 6|| Twist 5 7|| Impact 6 8| 5|
(a) See paragraph 1.5.
NOTE
(b) Numbers indic ate sequence in which tests ar e per formed.
2. SUMMARY OF TESTING
2.1. Vi sual and M ec hanical Inspect ion - A ll Test G r oups
Al l speci mens submitted for t esting were m anufac tured by Tyco Electroni c s, and were i nspect ed and|accept ed by the Produc t Assurance Department of the F iber Optics Business Unit.
Specimens are assumed t o be c ompli ant with FOCI S dimensions per T y c o E lect r onics First Ar ti c le|approval, which incl udes veri fic ati on of product dr awings per t he dimensions specified i n|TI A /EI A - 604- 12. For M T-RJ S E CURE pr oduc t, ar eas not impact ed by k ey ing geometr ies are assum ed|to comply, based on First Ar ti c le.|
2.2. Initial Optical Performance - A ll Test Gr oups
Al l at tenuation and ret ur n loss measurements m et the specifi c ation r equirement s. A ttenuation and
retur n loss were measured at 850 and 1300 nm for all test groups, bot h 50/125 and 62.5/ 125 micr on
fi ber si z e.
Perfor mance r equirements Multimode Test G r oups (1-7)|850 nm 1300 nm
Maxi mum all owed att enuation for any indi vidual specimen 0.75 0.75
Mi nimum al lowed return loss for any indi vidual specim en 20 20
Attenuation (I nsert ion Loss) and Return Loss - Requirements for New Product (dB)
501-545
Rev B 4 of 8
Test
Group Fiber
Type Maximum A ttenuati on Mi nimum Retur n Loss
850 nm 1300 nm 850 nm 1300 nm
1 Multimode 0.64 0.56 30.9 32.7
2 Multimode 0.60 0.49 34.8 34.9
3 Multimode 0.62 0.58 32.4 32.8
4 Multimode 0.64 0.59 34.0 31.9
5 Multimode 0.48 0.42 33.7 36.1
6| Multimode|0.63|0.47| 32.7| 34.2|7| Multimode|0.35|0.32| 36.4| 39.0|Attenuation (I nsert ion Loss) and Return Loss - Actual for New Product (dB)
2.3. Attenuation, Change in Attenuation, At tenuation Inc r ease and Retur n Loss – All Test Groups|
Al l at tenuation, c hange in at tenuation, attenuat ion increase and retur n loss measurements m et the|speci fic ati on r equirement s. A ll measurements were recorded at 850 and 1300 nm for 50/125
:
m and
62.5/ 125
:
m fiber si z es. V alues shown in the table below represent max imum attenuation, maximum
change i n attenuation, maximum at tenuation i nc r ease and mi nimum retur n loss.|
Test
Group Condition
Requirements
(850 and 1300 nm) Actual
(850 nm) Actual
(1300 nm)
Before During After Before During After Before During After
IL
)
IL|IL,RL,IL
8
|IL
)
IL|IL,RL,IL
8
|IL
)
IL|IL,RL,IL
8
|
1
Low temperature
0.75
0.3
0.75(IL)
20(RL)
0.59 0.08|0.59(IL)
31.0(RL) 0.55 0.07|0.53(IL)
31.6(RL)
Humidity, steady state 0.4 0.61 0.13 0.64(IL)
30.6(RL) 0.54 0.07 0.55(IL)
32.3(RL)
Temperature life NA 0.65 NA 0.64(IL)
30.9(RL) 0.55 NA 0.59(IL)
32.4(RL)
2
Strength of coupling mechanism
0.75 NA
0.75(IL)
20(RL) 0.58
NA
0.59(IL)
34.7(RL) 0.45
NA
0.46(IL)
34.7(RL)
Cable retention 0.75(IL)
20(RL)
0.5(IL
8
)|
0.61 0.61(IL)
34.7(RL)
0.06(IL
8
)|0.49 0.49(IL)
34.7(RL)
0.06(IL
8
)|
Side pull 0.60 0.65(IL)
34.7(RL)
0.07(IL
8
)|0.56 0.57(IL)
34.8(RL)
0.09(IL
8
)|
Durability 0.75(IL)
20(RL) 0.56 0.60(IL)
26.7(RL) 0.45 0.50(IL)
25.1(RL)
3
Cable flexing
0.75 NA 0.75(IL)
20(RL)
0.67
NA
0.73(IL)
32.5(RL) 0.64
NA
0.63(IL)
33.3(RL)
Twist 0.67 0.70(IL)
32.6(RL) 0.61 0.64(IL)
33.3(RL)
Impact 0.62 0.66(IL)
32.7(RL) 0.59 0.58(IL)
33.2(RL)
4
Low temperature
0.75
0.3|
0.75(IL)
20(RL)
0.59 0.06|0.59(IL)
34.1(RL) 0.59 0.05|0.59(IL)
32.2(RL)
Humidity, steady state 0.4|0.63 0.15|0.60(IL)
33.9(RL) 0.59 0.10|0.57(IL)
33.3(RL)
Temperature life NA 0.60 NA 0.60(IL)
33.7(RL) 0.58 NA 0.59(IL)
33.2(RL)
Change in A ttenuation, At tenuation Inc r ease and Retur n Loss Resul ts (dB)
(continued)
501-545
Test
Group Condition
Requirements
(850 and 1300 nm) Actual
(850 nm) Actual
(1300 nm)
Before During After Before During After Before During After
IL
)
IL|IL,RL,IL
8
|IL
)
IL|IL,RL,IL
8
|IL
)
IL|IL,RL,IL
8
|
Rev B 5 of 8
5
Cable retention, 0 degrees|
0.75 NA
0.75(IL)
20(RL)
0.5(IL
8
)|
0.44
NA
0.59(IL)
33.8(RL)
0.23(IL
8
)|0.52
NA
0.51(IL)
35.9(RL)
0.23(IL
8
)|
Cable retention, 90 degrees|0.40|0.52(IL)|33.7(RL)
0.14(IL
8
)|0.41|0.54(IL)|36.1(RL)
0.15(IL
8
)|
Cable flexing
0.75(IL)
20(RL)
0.52 0.61(IL)
33.4(RL) 0.45 0.72(IL)
34.2(RL)
Twist 0.60 0.41(IL)
33.5(RL) 0.71 0.52(IL)
33.3(RL)
Impact 0.41 0.42(IL)
33.4(RL) 0.51 0.47(IL)
33.8(RL)
6|Insertion loss and return loss|only (see paragraph 2.2. for|results)|NA|NA|NA|NA|NA|NA|NA|NA|NA|
7|
Strength of coupling mechanism|
0.75|NA|0.75(IL)|20(RL)|
0.38|
NA|
0.39(IL)|36.6(RL)|0.35|
NA|
0.35(IL)|39.2(RL)|
|Impact|
||| 0.40|
|0.31(IL)|36.5(RL)|0.35|
|0.27(IL)|38.5(RL)|
|Durability|
||
|0.34|
|0.42(IL)|26.4(RL)|0.32|
|0.35(IL)|28.1(RL)|Attenuati on, Change in A ttenuation, At tenuation Inc r ease and Retur n Loss (dB)
(end)
IL - Insertion Los s ( A ttenuation)
NOTE
)
IL - Change in Insertion Los s ( A ttenuation)
IL
8
- Insert ion Los s ( A ttenuation) Increas e
RL - Retur n Los s
2.4. Low Temper ature – T est Groups 1 and 4
There was no evi denc e of phy si c al damage t o the jac k c onnec tor or termi nated fi ber and no c hange in
optical performanc e bey ond the specified l imi t during low temperature exposure. All attenuati on and
retur n loss measurements m et requirements before and after t est. Opt ical perfor mance was measured
at 850 and 1300 nm.
2.5. Hum idity, St eady S tate - Test Groups 1 and 4
There was no evi denc e of phy si c al damage t o the jac k c onnec tor or termi nated fi ber and no c hange in
optical performanc e bey ond the specified l imi ts during steady state hum idity. All attenuati on and r eturn
loss measurement s met requirements befor e and after test. Optical performance was measured at 850
and 1300 nm .
2.6. Temperature Li fe - Test Groups 1 and 4
There was no evi denc e of phy si c al damage t o the jac k c onnec tor or termi nated fi ber after t emperature
life. A ll attenuation and ret ur n loss measurem ents met specifi ed limits bef or e and after t est. Opt ical
performance was measured at 850 and 1300 nm.
2.7. Str ength of Coupl ing Mec hanism - Test Groups 2 and 7|
There was no evi denc e of phy si c al damage t o the jac k c onnec tor or termi nated fi ber . Attenuation and
retur n loss measurements m et the specifi ed lim it s before and after strengt h of coupl ing mechanism
test. Optical perfor mance was measured at 850 and 1300 nm.
501-545
Rev B 6 of 8
2.8. Cable Retention, 0 Degr ees - T est Groups 2 and 5|
There was no evi denc e of fiber pullout, or other damage to the jack c onnec tor or t er minated fiber and
no change i n opti c al perfor manc e bey ond the specified l imi ts af ter cable ret ention test. Optical
performance was measured at 850 and 1300 nm.
2.9. Cable Retention, 90 Degr ees - T est Groups 2 and 5|
There was no evi denc e of fiber pullout, or other damage to the jack c onnec tor or t er minated fiber and
no change i n opti c al perfor manc e bey ond the specified l imi ts af ter side pull test. O pti c al perfor manc e
was measured at 850 and 1300 nm.
2.10. Durability - Test Groups 2 and 7|
There was no evi denc e of phy si c al damage t o the jac k c onnec tor or mat ing plug connect or .
Attenuation and ret ur n loss measurements met t he specifi ed lim it s before and after durability test.
Opt ical perfor manc e was measured at 850 and 1300 nm.
2.11. Cable Fl exing - T est Groups 3 and 5
There was no evi denc e of phy si c al damage t o the jac k c onnec tor or termi nated fi ber . Attenuation and
retur n loss measurements m et the specifi ed lim it s before and after flex test. Optical performanc e was
m easured at 850 and 1300 nm.
2.12. Twist - Test Gr oups 3 and 5
There was no evi denc e of phy si c al damage t o the jac k c onnec tor or termi nated fi ber . Attenuation and
retur n loss measurements m et the specifi ed lim it s before and after twist test. Optical performanc e was
m easured at 850 and 1300 nm.
2.13. Impact - Test Groups 3, 5 and 7|
There was no evi denc e of phy si c al damage t o the jac k c onnec tor. A ttenuat ion and return l oss
m easurement s met t he specified limi ts bef or e and after im pac t test. Opt ical perfor manc e was
m easured at 850 and 1300 nm.
3. T EST METHODS
The multimode environment al facility is an autom ated, FOTP-20 compliant test system with initial
specimen installat ion perfor med ac c or ding to FOTP-171 proc edur es. Fol lowing the installati on of the
specimens, t he sequential testi ng was perf or med.
3.1. Vi sual and M ec hanical Inspect ion
Product drawings and inspect ion pl ans were used to examine t he specim ens. They were ex amined
visually and func tionally.
501-545
Rev B 7 of 8
3.2. Attenuation (I nsert ion Loss)
Al l mul ti mode attenuat ion was measured in acc or danc e with FO TP-171, method D1 processes, except
that the l aunc h was part of the specimen under t est and was not reference quality. The ini ti al optical
power through each launch (plug) connec tor fiber pat hs was measured. The plug- to-jack c onnec tor
assembly was then m ated and optical power measured from the receive si de field fiber. A ttenuation
was c alculated by taki ng the di fference bet ween these two measurement s. The fi eld fiber was then
spli c ed to a receive lead attac hed to the optic al t est equipment. Opt ical power was recorded as a
referenc e to cal c ulat e c hange in at tenuation during/after subsequent tests. Optic al power readi ngs
were compensated by c hanges i n a source monitor c able. In cases where a c ontrol c able was al so
used and exceeded lim it s stated in t he specifi c ation, the c hange in the c ontrol cabl e was also f ac tored
into the loss.
3.3. Return Loss
Return loss was m easured in accor danc e with FO TP-8 or si mil ar method. A si ngle measurem ent was|recorded for ret ur n loss. Return loss was m easured initi all y and after eac h test evaluat ion.
3.4. Change in A ttenuation ( Insertion Loss)|
The ini tial opt ical power (dBm) t hr ough the specimens was recorded before the test usi ng an optic al
source and detector. Relative optical power (dB) t hr ough the fi ber was measured during and after eac h
test as applicable. Change in at tenuation was c alculated by taking the differenc e between the initial|m easurement and the duri ng/aft er measurements and recor ding the maximum r ange of all val ues for a|spec imen. Optical power readings were com pensated by c hanges i n the source m onit or c able. In|cases where a c ontrol c able was al so used and exc eeded li mit s stated in the specifi c ati on, the change
in the cont r ol cable was also factor ed int o the loss.
3.5. Attenuation Inc r ease|
Incr ease i n attenuation was calculat ed by taking the differenc e between the initial measurement and|the measurement after each appli c able t est. Attenuation i nc r ease represents a change in attenuation|that resul ts f r om a decr ease i n opti c al power (degraded perfor manc e) .|
3.6. Low Temper ature|
Mated specimens wer e subj ec ted to 0 ± 3
/
C for a period of 96 hours (4 days). Optical performanc e for
each specimen was recorded before and after exposure wi th the specim ens i n place in the test
chamber and at 4- hour inter vals throughout the exposure. Final optical performance was recorded
after specim ens ret ur ned to ambi ent condi ti ons.
3.7. Hum idity, St eady S tate|
Mated specimens wer e subj ec ted to 40 ± 2
/
C at 90 t o 95% RH for a period of 96 hours (4 days).
Opt ical perfor manc e for eac h specimen was recorded befor e and after exposure with t he specimens in
plac e in t he test chamber and at 4- hour int er vals throughout the exposure. Final optical performance
was r ec or ded after speci mens retur ned to ambient conditions.
3.8. Temperature Li fe|
Mated specimens wer e subj ec ted to 60 ± 2
/
C for a period of 96 hours (4 days). Optical performanc e
for each specim en was recorded before and after exposure wit h the specimens in place in the test
chamber. Final opt ical perfor mance was recorded aft er specim ens ret ur ned to ambient conditions.
501-545
Rev B 8 of 8
3.9. Str ength of Coupl ing Mec hanism|
The jack module assembl y was mat ed to a plug c onnec tor. A 33 N [7.4 lbf] tensile load was appli ed to
the plug housing at a r ate of 25.4 mm [ 1 in] per minute. The load was sustai ned for a mi nimum of 5|seconds. Optical perfor manc e was measured before and after test with the load removed.
3.10. Cable Retention, 0 Degr ees|
Specimens wer e subj ec ted to a sustained load of 2. 2 N [0.5 lbf] for a mi nimum of 5 seconds. The jack|connect or was secured to the t est fixture. The tensi le l oad was appli ed by wrappi ng the buffered or
coated fiber ar ound a 7.5 cm [3 in] diameter mandr el at a point 23 c m [ 9 in] fr om behind the bac k end
of the module assembl y . Load was applied at a r ate of 25.4 mm [ 1 in] per minute. Opt ical perfor mance
was measured before and after t est with the load removed.
3.11. Cable Retention, 90 Degr ees|
Specimens wer e subj ec ted to a sustained load of 2. 2 N [0.5 lbf] for a mi nimum of 5 seconds. The jack|connect or was secured to the t est fixture. The l oad was appli ed at a 90 degree pul l angle by wrapping
the buffer ed or c oated fiber around a 7. 5 c m [3 in] di amet er mandr el at a point 23 c m [ 9 in] fr om
behind the back end of the modul e assembly. Load was appli ed at a rat e of 25.4 mm [1 i n] per mi nute.
Opt ical perfor manc e was measured before and after test with the load removed.
3.12. Durability|
The plug-to-jack connection of each m ated specimen was subjected to 500 cycles of durability.
Specimens were manually cycled at a rat e not in excess of 300 cycles per hour. Jack and plug
connectors were cleaned as specified every 25 cycles. Optical perform ance was measured before
testing and after every 50th cycle. Specimens were unmated, cleaned, inspected, and re-mat ed before
each measurem ent.
3.13. Cable Fl exing|
Specimens were subjected to 100 cycles of fi ber flexi ng. Specimens were t ested at a rate of 15 cycles
per mi nute. A 7.5 cm [ 3 in] mandr el was used to apply a tensile load of 224 g [0. 5 lbf] to buffered or
coated fiber at a poi nt 20 cm [8 in] fr om the rear of a mat ed jack module. The fl ex arc was ± 90
degrees f r om a vertic al positi on. Opt ical perfor mance was measured before and after t est with the load
removed.
3.14. Twist|
Specimens were subjected to 10 cycles of twist. Specimens were t ested at a rate less than 30 cycles
per mi nute. A 7.5 cm [ 3 in] diameter mandr el was used to apply a tensile load of 2.2 N [ 0.5 l bf] t o
buffered or c oated fiber at a point 23 c m [ 9 in] fr om the rear of a mat ed jack module. The twist mot ion
for each cycle was ± 2.5 revol ut ions about the axis of the fiber. Opt ical performance was m easured
before and aft er test with the l oad r emoved.
3.15. Impact|
An unmated jack module assembly was dr opped from a hei ght of 1.8 m [70.9 in] onto a concrete slab.
The impact exposure was repeat ed 8 ti mes. I nit ial opti c al perfor mance was recorded before the
specimen was unmated and exposed to t esting. A fter completion of t he 8 impact s, eac h jack was
opened and re-t er minated ac c or ding t o guidelines i n 408- 8718. (Not e that re- termi nati on included
reposit ioning of the fiber only, and fi ber s were not re-c leaved.) Fi nal optical perfor mance was recorded
after all specimens wer e tested, re- termi nated, inspected, cl eaned and r e- mated to a plug connector.
For Test Gr oup 7 ( M T-RJ SE CURE ) , the plug was al so tested in addi ti on to the jack. Both plug and|j ac k were i ndividually dropped 8 t imes each. After c leaning the plug and re-termi nating the j ac k , parts|were mated back together to recor d final att enuati on and r eturn l oss.|
