: , SM 5ESS
SM. . SM (, , ).
SM (. 2.1): - , , PSU (Packet Switch Unit), SM ; - , :
Ø ISLU LU (Line Unit) ;
Ø DLTU (Digital Line Trunk Unit) ATU (Analog Trunk Unit) ;
Ø MMSU (Modular Metallic Service Unit)
Ø : () GDSU (Global Digital Service Unit) DSU-EXT (Digital Service Unit EXTention);
Ø 50 PPMU (Periodic Pulse Metering Unit).
2.1 SM
- PIDB (Peripheral Interface Data Bus) PICB (Peripheral Interface Control Bus). ISLU PSU DPIDB (Direct PIDB), D16 .
MCTU (Modular Controller & TSI Unit). MTU . MSTU :
Þ SMP (SM Processor);
Þ - TSI (Time Slot Interchanger) ;
Þ SP (Signalling Processor);
Þ DSU (Digital Service Unit);
Þ : I (Control Interface), DI (Data Interface), ( NCT) DLI (Dual Link Interface);
Þ PSU в (Packet Interface).
I SMP . SMP, SMP , . , I SMP SMP . I 23 в, SMP (service group), , , , 32 ().
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DI 32- 16- 4096 / PIDB 256- 32,768 / TSI .
- TSI SMP 16- 256-
DSU : (), (), - (), (), (), . DSU , .
PSU MSTU SM - 7 ( 6) ; - PSU 5ESS .
SM. 5ESS , 8 .
2.2 5ESS
SM. ISLU 2048 1024 . . : 16- Z 8- U - . , , , , . , ISLU Z U. LG (Line Group). LG D 32- .
ISLU : CD (Common Data), HLSC (High-Level Service Circuit) , RG (Ringing Generator), MAN (Metallic Access Network) (Common Control).
ISLU :
Ø BORSCHT ;
Ø (2 + D16) ;
Ø Z U PIDB TSI;
Ø D16 U DPIDB PSU;
Ø SMP.
Z BORSCHT:
B (battery feed) - (48 ) ;
O (vervoltage protection) - ;
R (ringing) - RG ISLU , , ;
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S (supervision) - , : , , , ;
(coding & decoding) - , 0,5 ;
H (hybrid) - ( ) ;
T (testing) - HLSC ISLU MMSU ( ) , .
LU. , , LU. , . BORSCHT , , .
DLTU 16 DFI (Digital Facility Interface), 2048 / : , -- , 1...15 17...31 -- (, ). , 16 . DFI, RSM, CTS RSM SM (RSM) .
MMSU . MMSU SMP в. MMSU SM RSM MMRSM. SLIM (Subscriber Lne Measurements) . MMSU 5SS. , .
GDSU. () GDSU SM (RSM) , : - . , в PIDB. -, TTF (Transmission Test Facility), TTF. - . , 32- . TTF , . , , , . . .
1. 2000 , 1000 12 .
2. .
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:
1. . 1 2 .
2. .1.
3. .
:
1. S?
2. , SM.
3. SM? SM?
4. BORSCHT.
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