() , , . , , .

(backbone network) . ' , . , , .

1:

(LOS: Line of sight) , .

, , , .

, , :

. (TRUNK NODES) . . , , .

. (ACCESS NODES) . .

. (LOOP GROUP, REMOTE SUBSCRIBERS) .

. (RR) , ' .

Scania P - 113HK, , . , . , , (bulk encryption) 2 Mbps.

2: SCANIA (' )

(administrators), (switch). :

. (Hot Line) , , .

. (Precedence and Pre-emption) , .

. (Camp-on-Busy)

, , (camp-on-busy).

. (Call Transfer)

H , .

. (Conference) ' - .

. (Call Hold)

, .

. (Abbreviated Dialing) .

: .

, .

.

, :

(SEP: System Executive and Planning). .

(OSC: Operating System Control). OSC () SEP.

(FC: Facility Control). ,

. OSC ( ) .

' , , ( ) , .

3: UNIMOC ( )

:

, .

(SEP, OSC) .

- , .

( 2Mb/s).

(Single Channel Radio Access), , . :

o (RAP), , .

o (MST), 30 (RAP).

( ), , .

SCRA SCRA (Single Channel Radio Access). SCRA , , , ( ) , . SCRA , ( ) , MSTs. SCRA , :

- .

SCRA .

4: SCRA

- .

SCRA , , , .

5: RAP

, , RAP (),

, .

SCRA

(MST: Mobile Subscriber Terminal). MST , MST's . RAP (Radio Access Point) . RAP () . () RAP 15-40 , .

6: Control Terminal MST /S 290 GD

SCRA :

. MST's RAP, RAP.

( ). MST's RAP, , . RAP , .

. . MST's RAP's RAP. , MST

, .

. (TRUNK NODES). (ACCESS NODES). (LOOP GROUP, REMOTE SUBSCRIBERS). (RR)

. (Hot Line). (Precedence and Pre-emption). (Conference). (Abbreviated Dialing)

:,

' SCRA