HSCSD GSM (.. GSM) , :
GSM 50 % 9,6 / 14,4 /
.
HSCSD BS20. BS20 HSCSD.
14,4 / (TCH/F14.4):
"", . , . (RA') (FEC') . (RA') -TRAU, ' (RAA'). 14,4 / MS, BSS (.. TRAU) MSC (.. IWF). 22,8 /.
. 3.18 GSM ( CDA) (3,1 , ) "" D900/D1800
3.18 GSM ( CDA) (3,1 , /V.34) "" HSCSD (TCH/F14.4).
HSCSD " " (BS20) "" "" . "" (RLP'). 2 RLP' 1 0. HSCSD , . , , . PLMN , . ( , V.110) (V.34 (V.90) ) , .
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:
SSS 2 . TCH/F9.6, TCH/F14.4. , . , "" 1 , "" 2 . "" GSM.
- MSC - , (, TCH/F14.4, TCH/F9.6, TCH/F4.8, TCH/F2.4 ( ), TCH/4.8, TCH/2.4 ( ), TCH/FS ( ), (EFR)). - (.. ), (TRAU), (TRAC). , 20 (FR) 1, 2 (EFR), ( 14,4 /), (HR) 1, .
MSC , . , , MSC -, . . 3.19 HSCSD ( TCH/F14.4).
3.19 HSCSD .
, . , - ( 3) . ( 3).
(TS11)
"" . , . GSM , , D900/D1800 . / () , 13 / 22,8 /. TRAU BSS D900/D1800 (. 3.20).
3.20 GSM ().
(TS12)
- , MOC. ( -, ) SOS MS . (LMN), MSC.
LMN . (. " SSS", 1, "", " ".)
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, 3 (TS62)
3. (D900/D1800) - (FA) (IWF) (. 3.21). - T.30 ITU-T. - .
3.21 - "" ( 3).
MS FA (TAF). TAF, , FA . MS IWF MSC ISDN "3,1 , ". - IWF ISDN . - 3,1 -. - ISDN, TA c 3,1 .
. T.30 (" (CMM)").
IWF . - 9 600 / 7 200 / 4 800 /, 2 400 / .. 7200 / 4800 / .. (. " SSS", 1, "", "- 3 ISDN/PSTN").
( 3) (TS61)
, . " (ICM)". , . IWF, ( PSTN/ISDN). IWF , .
(TS21, 22)
( , PP)
" " ( ) 160 . ( SMS) (. 3.22). ( ).
, SMS GSM , PLMN.
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3.22 .
GSM SMS.
SMS D900/D1800 D900/D1800, MS, BSS MSC, MS MSC, (SMS-IWMSC)/ MSC, (SMS-GMSC). (. " SSS", 1, "", " , MS MS, ").
(TS23)
(CBC) (MS), . Siemens (SBS) CBC, BSS (.. BSC), - (. 3.23). - (CBE), . CBC, BSC SBS (CBC) , PLMN CBC .
GSM , . , , , .
PLMN , , , , . , , .
3.23 .
/ (TS91/TS92)
VGCS/VBS . " D900/D1800", GSM-R, " ". , , , , , , , , . eMLPP (ASCI), .
( / ). , D900/D1800, " D900/D1800", " ", " ". . ( ) .