Schematic · n.d.
E-580260 Connector Circuit Explanation (local or toll, trunk/level hunting, night line)
Step-by-step circuit explanation of an AE connector; the textual companion to H-580260.
Schematic · n.d.
Step-by-step circuit explanation of an AE connector; the textual companion to H-580260.
i ., 1 COPTL$. CKT LOC.$I, OR S IFIPLIFIED TOT,L-TT.:!( & LEV. KT^. IIITI1 NIGIIT LINE S E N . ON ALL LI1fl.S EXCEFT 16T IN CRP., ETON-REV. EAT. SUPW. ON SFFC. X.VS GRD. OR BAT. GEN. H-580260 (V1difo3 opccificdly for circcit icmo 1 6 , but ,ray d c o apply ta lafox ic3ncr. fiofor to H print for approprioto P icsuo numbor.) *Not updated f o r NAFM F i g s . FEATURES ( ) p e r m i t s s e i z u r e by b a t t e r y o r absence of ground searching Selectors (b) F l a s h busy f o r s i m p l i f i e d T o l l T r a i n (c) Last party or c a l l i n g party r e l e a s e (d) F r e e s e r v i c e on s p e c i f i e d l e v e l s (c) Night l i n e s e r v i c e on a l l l i n e s e x c e p t f i r s t i n F l a s h busy by r e v e r s e b a t t e r y controlled by grocnd p r o j e c t e d forward over EC l e a d o r 4 t h w i r e ( g ) P r o v i d e s timed d i s c o n n e c t i o n 1 (E) i' C I R C U I T OPEBATION 1. S e i z u r e (Operated : VON S p r i n g s ) B a t t e r y v i a #2 windine of r e l a y C on lend C marks t h i s s w i t c h i d l e . When s e i z e d grocnd v i a l e n d C c l o s e s #2 windi n g of r e l a y C end r e l n y A i s c l o s e d v i a l e a d s +LIP33 and -LINE. Relay C o p e r a t e s . Relny A o p e r a t e s w d c l o s e s r e l a y B. Relny B o p e r a t e s . c l o o e s r e l n y L ( i f FIG TA i s used) o r c o n n e c t s ground t o l c o d 1: ( i f '7?' v i n i c ~i o used) c o x n e c t s ground t o l c n d C t o hold t h e preceding equipm-r - ~ tm d t o mrlc t h i s switch busy. (UIlen n c i s c d by a t o l l s w i t c h t r a i n , ground forwarded v i a lcnd C s h o r t - c i r c u i t s r e l a y L ~rhenr e l a y I3 o p e r a t e s and c o n r c c t s ground t o lcod C v i a C2 winding o f r e l a y L . ) Relay L o p c r n t c s i t s "::"c o n t a c t s , l o c k s v i a i t s # 2 winding and s h o r t - c i r c u i t s i t s /I1 winding. ' 2. Vertical L j (VON s p r i n g s (Operated: Relays A , R , C , arld p o s s i b l y Relay A follows t h e p u l s e s ( s ) of t h e f i r s t d i g i t and when a t normal, opens r e l a y R , a n d cl-oses # 1 winding o f r e l a y C i n s e r i e s w i t h t h e VERT magnet. The VERT magnet o p e r a t e s , and s t e p s t h e switch s h a f t t o t h e d i a l e d l e v e l . The VON s p r i n g s r e s t o r e on t h e f i r s t v e r t i c a l s t e p [Relay J (FIG FS) could be closed a t t h e end of v e r t i c a l s t e p p i n g (see S e c t i o n 9)1. Relays B and C do not r e s t o r e during d i a l i n g due t o t h e r r slow--to-release c h a r a c t e r i s t i c s . A f t e r t h e l a s t p u l s e of t h e d i g i t , r e l a y A remains operated and opens winding of r e l a y C and t h e VERT magnet. A f t e r i t s slowt o - r e l e a s e i n t e r v a l , r e l a y C and the VERT magnet r e s t o r e . 3. -Rotary Steppin5 (Operated: Relays A 2 B2 and p o s s i b l y L ~ 7 d / 0 rJ ) Relay A f o l l o w 3 the p u l s e s o f the second d i ~ i at n d when a t noscnl c l o ~ c othe ROT c 2 p c t clad r c l a y E. The ROT n n s n e t opcenccs a d otcpa t h c c r ~ i t c hto the d i a l c d l i n e . BcLoy E o p c s a t c s ~ n dc a a n c c t s relay K t o ehe C w i p c r . A f t c r t h 3 l a s t pubcc o f the d i s i t , r e l a y A r e m i n o o p c r a t c d o ~ . dopcns r e l a y E ~ 3 dt k ROT rnzF-et. The ROT noset E C G ~ O Z C G . KClay E docs n o t r e s t o r e a t t h i s timz due t o i t s slow-ro-reiease characteristic. 4. T e o t i c q t h s Callcd L i q e (Operated: m d p o o ~ i b l yL m d / o r J ) 4.21 Cnll.cd Lhe Relays A, B, E, Et?3y If t h 2 c a l l e d line i.0 busy, g r o m d v i a t h e C w i p e r cloccc; r e l a y K b e f o r e r c l a y E rcsttdrc~j. Relay M ~ p c s a t e r r . A f t c r i t s olct~-to-rclcocci.ntc:-gal,, r e l a y E r c o t o s c s , c l o ~ c o/I2 w i n d i . ~o f r e l a y 11 m d o p c m srclay I<. Rclay tl opczatco a d locbo. AEecz t t o c l o w - t o - r e l c a s c i ~ t c s v a lr c~l a y I< e c s t o z c o clad c(421ccts kcad CCSU T@:E t o l c a 3 -LEE2 v i a capclcilGoz N, c m n c c t o lead 60 LPlI CO h o d EC .=d c l o s e s t h e #1 winding of r e l a y D v i a t h e 60 IP1.1. Relay D follows t h e 60 IPM p u l s e and i n t e r m i t t e n t l y corlnect and disconnect ground f r o m lead EC t o provide a f l a s h busy s i g n a l t o t h e preceding switch t r a i n . I I f t h e d i a l e d number r e p r e s e n t s t h e l a s t l i n e of a group, ground v i a t h e m e t e r o r 1 2 0 0 o h m r e s i s t o r a n d t h e E C w i p e r c a n n o t o p e r a t e r e l a y P s i n c e i t s non-inductive winding and shunt r e s i s t o r prevent i t s o p e r a t i o n . 4.12 Called Line I d l e If t h e c a l l e d l i n e i s i d l e , r e l a y K does not operate. A f t e r i t s slow-to-release i n t e r v a l , r e l a y E r e s t o r e s and conn e c t s 7'11 winding of r e l a y G t o wiper C . Battery v i a w i e r C c l o s e s $1winding of r e l a y G . Relay G o p e r a t e s i t s "XrPcontacts, locks v i a i t s $12 winding, o p e r a t e s f u l l y , s h o r t - c i r c u i t s t h e i / l w i n d i n g o f r e l a y G , connects g r ~ u n dt o w i p e r C t o m a r k t h i s l i n e busy, c l o s e s r e l a y N . ~ e l o pae r a~t e s~a s d e s c r i b e d i n Section 5. 4.2 4.21 C a l l s t c t h e F i r s t Tdine of a Trunk Hunting Group Called Line I d l e Operation i s t h e same a s t h a t described i n Section 4.12 4.22 Called Line Busy Operation i s s i m i l a r t o t h a t described i n Section 4.11 except t h a t whenrelay E r e s t o r e s , t h e # l w i n d i n g o f r e l a y P i s closed i n serieswiththe#Z non-inductivewindingofrelayPvia ground onwiper E C , t h e # 2 w i n d i n g o f r e l a y M i s closed, and r e l a y K i s opened. RelayMoperates and locks v11 i aII t h e r o t a r y i n t e r r u p t e r s p r i n g s . Relay P o p e r a t e s t o i t s X c o n t a c t s , s h o r t c i r c u i t s i t s i i 2 ~ i n d i n g ,o p e r a t e s f u l l y , locks, t r a n s ferswiperECtothe#1windingofrclayM,connects resistor C t o t h e C w i p e r , closcstheROTmagnetandre-closes relayK which did not r e l e a s e due t o i t s show-to-release charac t e r i s t i c . Relay Gdoes n o t o p e r a t e a t t h i s time due t o t h e b u s y groundonthecwiper. TheROTmagnetoperates,stepsthe wipers t o t h e n e x t b a n k c o n t a c t , a n d opens r e l a y K a n d t h e j j 2 w i n d i n g o f r e l a y M v i a i t s i n t e r r u p t e r s p r i n g s . RelayKdoes notrestoreduringtrunlchuntingduetoits slow-to-release characteristics. R e l a y M r e s t o r e s and opens theROTmagnet. The ROTmagnetrestores a n d c l o s e s M a n d K . I n t e r a c t i o n b e t w e e n r e l a y M a n d t h e I l O T m a g n e t c o n t i n u e s , stepping t h e switch, u n t i l a n i d l e l i n e i s found, t h e l a s t t r u n k i n t h e group i s reached, o r t h e e l e v e n t h r o t a r y s t c p i s taken. If a n i d l e l i n e i s found, r e s i s t a n c e b a t t e r y i s r e t u r n e d v i a wiper,: ,Itclosing t h e iil winding of r e l a y G . Relay G o p e r a t e s t o i t s X cont a c t s , o p e r a t e s f u l l y , l o c k s , removes ground f r o m t h e r o t a r y ii I i n t e r a c t i n g c i r c u i t , ccnnects ground t o the C wiper, opens Relay M r e s t o r e s . The t h e EC wiper and c l o s e s r e l a y N . ROT magnet r e s t o r e s . Relay N o p e r a t e s and opens r e l a y P . A f t e r i t s slow-to-release i n t e r v a l , Relay P r e s t o r e s r e l a y K r e s t o r e s . Further o p e r a t i o n i s s i m i l a r t o t h a t described i n S e c t i o n 4.12. . 4.23 ' A l l Trunks i n Group Busy. I f t h e l a s t t r u n k i n a g r o u p i s busy, ground i s r e t u r n e d v i a wiper C a n d r e s i s t a n c e g r o u n d i s r e t u r n e d v i a w i p e r E C . Relay Mremains o p e r a t e d v i a g r o u n d onwiper EC. The ROTmagnet remains operatedopening r e l a y K . A f t e r i t s slow-to-release i n t e r v a l , r e l a y K r e s t o r e s , opens theROTmagnetand connects l e a d BUSYTONEnnd60 I P M ~ Sd e s c r i b e d i n S e c t i o n 4 . 1 1 . 4.24 Level Hunting I f a t r u n k group covers more than one l e v e l a2d a l l t h e t r u n k s on t h e f i r s t l e v e l a r e busy, t h e s w i t c h w i p e r s w i l l be s t e p p e d t o t h e e l e v e n t h r o t a r y s t e p operatingtheCAMSPGS. I n t h e e l e v e n t h r o t a r y p o s i t i o n , 1 ~ 1 w i n d i n g o f r e l a y M i sopened. The ROTmagnetheldoperated o p e n s l / 2 w i n d i n g o f r e l a y M . Re1 a y M r e s t o r e s and opens the ROTmagnet. TheROTmagnetres t o r e s and c l o s e s r e l a y H . R e l a y H o c r a t e s , c l o s e s theRLS magnet and t h e VERTmagnet and cpens jlwinding of r e l a y G. The VERTmagnetoperates p a r t i a l l y t o k e e p t h e s h a f t f r m r e s t o r i n g v e r t i c a l l y . TheRLSmagnetoperates and r e l e a s e s t h e switch s h a f t . As t h e s w i t c h s h a f t r e s t o r e s t o r o t a r y n o r m a 1 , t h e v e r t i c a l w i p e r connects t o t h e v e r t i c a l b a n l c , c o n n e c t i n g d i r e c t g r o u n d t o t h e V E R T m a g n e t . TheCAMSPGS r e s t o r e , open t h e RLS magnet, and c l o s e /I2 winding of r e l a y M. The RLS magnet r e s t o r e s . RelayMoperates. The VERTmagnetoperates comp l e t e l y , r a i s e s t h e s w i t c h s h a f t t o t h e next bank l e v e l , and opens r e l a y H . R e l a y H r e s t o r e s , opens theVERTmagnet,and closes theROTmagnet.TheROTmagnetoperates, steps the s w i t c h s h a f t t o t h e first bankcontactandtrunk-hunting cont i n u e s a s e x p l a i n e d i n S e c t i o n 4 . 1 2 , 4 . 2 2 , and 4.23. P 5. 5.1 I Rin i n ~d-1~ t h e Called Line L or J) (Operated: ( F i ~ s11-18,ZO-21, and 24-25) Relays A , B, G, (NAFM) A f t e r i t s slow-to-operate i n t e r v a l , r e l a y N o p e r a t e s , conn e c t s lead RB TONE t o t h e c a l l i n g l i n e v i a c a p a c i t o r s M and N , and connects t h e r i n g i n g c u r r e n t (FIG BD o r FIG GG)to t h e c a l l e d l i n e v i a # I winding of r e l a y F. Relay F w i l l n o t o p e r a t e on a l t e r n a t i n g c u r r e n t . , 1 u-' a. ti -- 5.2 ( F i g s 19,22,23and 26) Relay N ( f a s t c o i l ) o p e r a t e s , c o n n e c t s l e a d RBTONEtothe cc u a lr lr ienngt l(FIG i n e vBGORE'IGGG) i a c a p a c i t o rt so Et IhaencdaNl l, ea dn dl ci no en nvei ac H t s1t h wei rnidnignignogf r e l a y F. Relay F w i l l n o t o p e r a t e o n a l t e r n a t i n g c u r r e n t . 6. 1 C a l l e dParty-4nswers (Operated: Relays A , B y G , N , and pos s l b l y L o r J) 6.1 ( F i g s 11-18, 20-21, and 24-25) (NAFM) When t h e c a l l e d p a r t y a n s w e r s , r e l a y F i s c l o s e d v i a f t e r i t s slow-ta-operate i n t e r v a 1 , r e l a y wipers 4 - a n d 5 + . A F o p e r a t e s t o i t s 11X I 1 c o n t a c t s , o p e r a t e s F u l l y a n d l o c k s v i a i t s # l w i n J i n g , d i s c o n n e c t s IeadRBTONE f r o m t h e c a l l i n g l i n e , d i s c o n n e c t s t h e r i n g i n g c i r c u i t (FIG BG OR FIG GG) from t h e c a l l e d l i n e and c l o s e s r e l a y Dand c o n n e c t s ground t o l e a d SUPYI. Relay D o p e r a t e s , g i v e s s u p e r v i s i o n by r e v e r s a l o f p o l a r i t y on l e a d s +LINE and -LINE, a n d / o r by connectrng g r o u n d t o l e a d E C ("W1'wiring). ( I f FIGFS i s used, p o l a r i t y w i l l n o t be r e v e r s e d a s e x p l a i n e d i n S e c t i o n 8 ) . 6.2 (FIGS 1 9 , 2 2 , 2 3 , and 26) When t h e c a l l e d p a r t y answers, r e l a y F i s c l o s e d v i a w i p e r s 4- and 5+. A f t e r i t s s l o w - t o - o p e r a t e i n t e r v a l , r e l a y F o p e r a t e s t o i t s 11X 11 c o n t a c t s , o p e r a t e s f u l l y a n d l o c k s v i a i t s #Lwinding, disconnectsleadRBTONE f r o m t h e c a l l i n g l i n e , d i s c o n n e c t s t h e r i n g i n g c i r c u i t (FIG BG OR FIG GG) from t h e c a l l e d l i n e , c l o s e s r e l a y D , and t r a n s f e r s r e l a y Bfrornground t o leadTB. RelayD o p e r a t e s , g i v e s s u p e r v i s i o n b y r e v e r s a l o f p o l a r i t y on l e a d s +LINE and - LINE, c o n n e c t i n g ground t o l e a d EC ("w" w i r i n g ) , and t r a n s f e r s r e l a y B from l e a d TD t o ground. ( I f F I G F S i s u s e d , p o l a r i t y w i l l n o t b e r e v e r s e d a s explainedinsection 9). 7. R e l e a s e 7.1 From a Completed C a l l (Operated: Relays A , B y D , F, G , N , and p o s s i b l y L a n d / o r J ) 7.11 L a s t P a r t y Release ("L" w i r i n g ) (FIGS 11-18, 20-21, and 24-25) (NAFM) 7.11.1 C a l l i n g P a r t y Disconnects F i r s t When t h e c a l l i n g p a r t y d i s c o n n e c t s f i r s t , t h e c i r c u i t t o r e l a y A i s o p e n e d v i a l e a d s +LINE and -LINE. RelayA r e s t o r e s and opens B a n d c l o s e s r e l a y E . R e l a y E o p e r a t e s a n d d i s c o n n e c t s w i p e r C f r o m l e s d c . A f t e r i t s slow-to-release interval, r e l a y B r e s t o r e s , removes ground f r o m l e a d c a n d o p e n s r e l a y E . After i t s slow-to-release i n t e r v a l , r e l a y E r e s t o r e s a n d r e c o n n e c t s wiperC a n d g r o u n d t o l e a d C t o m a r k t h i s s w i t c h b u s y . When t h e c a l l e d p a r t y d i s c o n n e c t s , t h e c i r c u i t t o r e l a y D i s opened v i a w i p e r s 5 + and 4 - . Relay D r e s t o r e s , r e ito ores p o l a r i t y t o normal i f r e l a y J i s n o t o p e r a t e d , o p e n s r e l a y N, # 2 winding o f r e l a y L ( i f o p e r a t e d ) , r e l a y J ( i f o p e r a t e d ) , # 2 w i n d i n g of r e l a y G , and # 2 winding o f r e l a y F , removes ground from l e a d S U P Y 2 and l e a d EC ("W" w i r i n g ) and c o n n e c t s ground t o l e a d SUPY 1. Relay G r e s t o r e s . A f t e r i t s s l o w - t o - r e l e a s e i n t e r v a l due t o t h e s h o r t c i t c u i t o f i t s #1 w i n d i n g , r e l a y L r e s t o r e s ( i f o p e r a t e d ) , and/or r e l a y J r e s t o r e s ( i f o p e r a t e d ) . A f t e r i t s slow-tor e l e a s e i n t e r v a l , r e l a y F r e s t o r e s , d i s c o n n e c t s l e a d s +LINE and -LINE v i a c a p a c i t o r s P and M r e s p e c t i v e l y from w i p e r s +5 and - 4 and removes g r o u n d from l e a d SUPY 1. A f t e r i t s s l o w - t o - r e l e a s e i n t e r v a l , r e l a y N r e s t o r e s and removes ground from l e a d C and w i p e r C and c l o s e s t h e RLS magnet. The RLS magnet o p e r a t e s and r e t u r n s t h e s w i t c h s h a f t t o normal. The s w i t c h s h a f t a t normal o p e r a t e s t h e VON s p r i n g s . The VON s p r i n g s o p e r a t e , o p e n t h e RLS magnet and c o n n e c t r e s i s t a n c e b a t t c r y v i a # 2 winding of r e l a y C t o l e a d C. The RLS magnet r e s t o r e s and t h e c i r c u i t i s a t normal. I 7.11.2 Called P a r t y Disconnects F i r s t When t h e ca1.led p a r t y d i s c o n n e c t s f i r s t , t h e c i r c u i t t o r e l a y D i s opened v i a w i p e r s 5+ and 4-. Relay D r e s t o r e s , c o n n e c t s ground t o l e a d SUPY 1 and r e t u r n s p o l a r i t y t o normal i f r e l a y J (FIG FS) i s n o t o p e r a t e d and removes ground from l e a d EC ("W" w i r i n g ) . When t h e c a l l i n g p a r t y d i s c o n n e c t s , o p e r a t i o n i s s i m i l a r t o t h a t described i n Section 7.11.1 except t h a t r e l a y B a l s o o p e n s r e l a y F , G I N , and L o r J ( i f o p e r a t e d ) . 7.12 C a l l i n g P a r t y R e l e a s e ( F i g s 11-18, (NAFM) 7.12.1 C a l l i n g P a r t y D i s c o n n e c t s F i rst 20-21, and 24-25) When t h e c a l l i n g p a r t y d i s c o n n e c t s f i r s t , t h e o p e r a t i o n i s s i m i l a r t o t h a t d e s c r i b e d i n S e c t i o n s 7 . 1 1 . 1 and 7.11.2 e x c e p t t h a t when r e l a y B restores, it a l s o opens r e l a y s F , G , N , and L and/or J ( i f o p e r a t e d ) . When r e l a y N r e s t o r e s i t o p e n s r e l a y D. R e l a y D r e s t o r e s , removes ground from l e a d SUPY 1 and l e a d EC ("W" w i r i n g ) and r e t u r n s b a t t e r y p o l a r i t y t o normal i f r e l a y J ( F I G FS) i s n o t o p e r a t e d . The RLS magnet and s u b s e q u e n t o p e r a t i o n s a r e t h e same a s d e s c r i b e d i n S e c t i o n 7.11.2. , . ' f 7.12.2 C a l l e d P a r t y Disconnects ~ -irst O p e r a t i o n i s t h e same a s t h a t d e s c r i b e d i n S e c t i o n 7.11.2. .2- '.. 7.13 7.13.1 C a l l i n g P a r t y R e l e a s e w i t h Timed 7 ~ i g s1 9 , 22, 2 3 , and 2 6 ) isc connection C a l l i n g P a r t y Disconnects F i r s t When t h e c a l l i n g p a r t y d i s c o n n e c t s f i r s t , t h e c i r c u i t t o r e l a y A i s opened v i a l e a d s +LINE and -LINE. ~elay A r e s t o r e s and o p e n s B and c l o s e s r e l a y 3. R e l a y E After o p e r a t e s and d i s c o n n e c t s w i p e r C from l e a d C. i t s s l o w - t o - r e l e a s e i n t e r v a l , r e l a y B r e s t o r e s , removes g r o u n d fro13 l e a d C , o p e n s r e l a y E , r e l a y N , # 2 winding o f r e l a y L ( i f o p e r a t e d ) , r e l a y J ( i f o p e r a t e d ) , #2 w i n d i n g o f r e l a y G , and # 2 winding of r e l a y F. A f t e r i t s s l o w - t o - r e l e a s e i n t e r v a l , r e l a y E r e s t o r e s and rec o n n e c t s w i p e r C and g r o u n d t o l e a d C t o mark t h i s s w i t c h R e l a y G r e s t o r e s and removes ground from w i p e r C and busy. l e a d C. A f t e r i t s s l o w - t o - r e l e a s e i n t e r v a l due t o t h e s h o r t c i r c u i t o f i t s #l w i n d i n g , r e l a y L r e s t o r e s ( i f o p e r a t e d ) , a n d / o r r e l a y J r e s t o r e s (if o p e r a t e d ) . R e l a y N r e s t o r e s , opens r e l a y D , d i s c o n n e c t s l e a d s +LINE and -LINE v i a c a p a c i t o r s P and N , r e s p e c t i v e l y , form w i p e r s 5+ and 4 - and c l o s e s t h e RLS m a g n e t . A f t e r i t s s l o w - t o - r e l e a s e i n t e r v a l relay F restores. Relay D r e s t o r e s , r e t u r n s p o l a r i t y t o normal i f r e l a y J i s n o t o p e r a t e d , and removes ground from l e a d EC ("W" w i r i n g ) . The RLS magnet o p e r a t e s and r e t u r n s t h e s w i t c h s h a f t t o normal. The s w i t c h s h a f t a t normal o p e r a t e s t h e VON s p r i n g s . The VON s p r i n g s o p e r a t e , open t h e RLS magnet and c o n n e c t r e s f s t a n c e b a t t e r y v i a # 2 w i n d i n g o f r e l a y C t o l e a d C marking t h i s s w i t c h i d l e . The RLS magnet r e s t o r e s and t h e c i r c u i t i s a t normal. 7.13.2 C a l l e d . P a r t y Disconnects F i r s t When t h e c a l l e d p a r t y d i s c o n n e c t s f i r s t , t h e c i r c u i t t o r e l a y D i s opened v i a w i p e r s 5+ and 4-. Relay D r e s t o r e s , r e t u r n s p o l a r i t y t o normal i f r e l a y J i s n o t o p e r a t e d , removes g r o u n d from l e a d EC ("W" w i r i n g ) , and t r a n s f e r s r e l a y B from ground t o l e a d TD. When t h e c a l l i n g p a r t y d i s c o n n e c t s , o p e r a t i o n i s s i m i l a r t o t h a t d e s c r i b e d i n S e c t i o n 7.13.1 e x c e p t t h a t r e l a y D i s r e s t o r e d b e f o r e r e l a y N. If t h e c a l l i n g p a r t y does n o t d i s c o n n e c t , a f t e r a c e r t a i n t i m e i n t e r v a l a h i g h r e s i s t a n c e ground f r o m l e a d TD A f t e r i t s slow-to-release i n t e r v a l , relay B o p e n s r e l a y B. , .. . - r e s t o r e s and s u b s e q u e n t o p e r a t i o n s a r e s i m i l a r t o t h a t d e s c r i b e d i n S e c t i o n 7 . 1 3 . 1 e x c e p t t h a t when g r o u n d i s removed from l e a d C ( r e l a y N r e s t o r e d ) , t h e p r e c e d i n q s w i t c h e s i n t h e S e l e c t o r r e s t o r e which i n t u r n o p e n s t h e l o o p t o r e l a y A v i a l e a d s + L I N E and - L I N E . Relay A restores. The RLS magnet o p e r a t e s and f u r t h e r o p e r a t i o n s a r e t h e same a s , d e s c r i b e d i n S e c t i o n 7.13.1. C 7.2 . F = O ~a ~ u a ~ ~ o n d i t i (oOnp e r a t e d : R e l a y s A , 8 , N, and p o s s i b l y P , D, C, and L and/or J ) -. 7 . 2 . 1 ( F i g s 11-18, 20-21, and 24-25) (NAFM) O p e r a t i o n i s s i m i l a r t o t h a t d e s c r i b e d i n S e c t i o n 7.12.1, e x c e p t t h a t when r e l a y B r e s t o r e s , it o p e n s r e l a y s M and P and L a n d / o r J, removes ground from l e a d C and w i p e r C and c l o s e s t h e RLS magnet. R e l a y M restores, removes 1ead'BUSY TCNE from l e a d -LINE v i a c a p a c i t o r N and l e a d 60 IPM from #1 w i n d i n g o f r e l a y D. Relay D i f o p e r a t e d r e s t o r e s , r e t u r n s p o l a r i t y t o n o r m a l if r e l a y J (FIG F S ) i s n o t o p e r a t e d and removes g r o u n d Relays from l e a d EC ("W" w i r i n g ) . Relay P r e s t o r e s . L and/or J r e s t o r e as d e s c r i b e d previously. The RLS magnet o p e r a t e s and f u r t h e r o p e r a t i o n i s t h e same a s d e s c r i b e d i n S e c t i o n 7.11.1. ( F i g s 1 9 , 22, 23, and 26) O p e r a t i o n i s s i m i l a r t o t h a t d e s c r i b e d i n S e c t i o n 7.13.1 e x c e p t t h a t when r e l a y B r e s t o r e s , i t o p e n s r e l a y s M and P , G and L and/or J removes gr-ound fr'm lead C-and c l o s e s the RLS magnet. ~ e i Ma ~ restores, removes lead BUSY TONE from lead -LINE via capacitor N and lead 60 IPM from #1 wind- . ing o f relay D. Relay D 3.9 operated restores, returns pol a r i t y t o normal i f r e l a J i s not operated and reacmes ground from lead F.1: ("W" wiringr. Relay P restore*. R e l a y G re-. store8 and rerhoves ground from wiper.C. Relay L and/or J restore as described previously. The RLS magnet operates and further operation i s the same as described i n Section 7 . 1 3 . 1 . 7.3 7.3.1 From a n Unanswered C a l l (Operated: G, N , and p o s s i b l y L a n d / o r J) ( F i g s 11-18, 20-21, and 24-25) Relays A, B, (NAFM) O p e r a t i o n i s s i m i l a r t o t h a t d e s c r i b e d i n S e c t i o n 7.12.1 e x c e p t t h a t r e l a y s F and D a r e n o t o p e r a t e d . When r e l a y N , restores, i t d i s c o n n e c t s t h e r i n g i n g c i r c u i t from w i p e r s 5+ and 4-. for Trunk Group *