ISDN , .
() ISDN. . ISDN (. 4)
4. ISDN
. 15 . ISDN, 32- , ISDN. 32 .
6.2
.
, . , , , .
, , . , , , , , . , , , . , .
, , , , , . , , , , ( , , . .). Storage Networking Industry Association (SNIA), Serial ATA Working Group, SCSI Trade Association .
, . , . (ANSI).
SCSI
() SCSI, Fibre Channel SATA.
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Small Computer Systems Interface (SCSI) 20 . 80- . , , , , CD-ROM, , , . . , . . , .
SCSI 16 , (). SCSI , - . SCSI , . , , SCSI.
SCSI . , , , 15 . SCSI , .
, . SCSI , , (. 1). SCSI , SCSI. SCSI, .
IDE/ ATA (AT Attachment) SCSI , SCSI ( , SCSI . .). IDE/ATA 1986 ., 1990 .
. -, , .
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. , , , , , .
, "" "", , , - , . : "" , , "" - , .
, , . , , . - , - , , , .
iSCSI
, , Internet SCSI (iSCSI). iSCSI, IP, Intranet . IP, iSCSI Intranet , .
, SAN Fibre Channel, iSCSI . , iSCSI , Fibre Channel, ( 1 / iSCSI 2 / FC). , Fibre Channel, iSCSI IP.
, iSCSI, Intel, Qlogic, Adaptec, IBM, Cisco . iSCSI , SAN , . iSCSI , , .
http://citforum.ru/nets/protocols/1_01_01.shtml
http://www.osp.ru/lan/2005/07/140754/
6.3
6.4
?
, .
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/ . - , .. , . .1, , / , .
1
.
- CAS (Channel Associated Signalling) CCS (Common Channel Signalling). (CAS) ( ) , . (CCS) , , .
7
, ITU-T ( CCITT). CAS:
1VF (One Voice Friequency) - ;
2VF (Two Voice Friequency) - (CCITT No. 4);
MVF (Multi Friequency Pulse) - (CCITT No. 5).
- / .
CCS SM (Signalling Message) - SL (Signalling Link) , SE (Signal Unit). SPC (Stored Programm Control) - PCM (Pulse-Code Modulation). SLS (Signalling Link Set) ( ), (Signalling Network).
:
CCITT Signalling System No. 6
CCITT Signalling System No. 7
60- . - CCITT No. 7 (SS#7) 70- 64 /. SS#7 :
- ;
- ;
- CAS ;
- .
- , .
SS#7 - !!!
, SS#7 . , , 80- . 80- SS#7 CCITT. SS#7 :
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PSTN - Public Switched Telephone Network
ISDN -Integrated Services Digital Network
PLMN -Public Land Mobile Network
IN - Intelligent Network
SS#7 (. 2).
2.
SS#7.
(ITU-T, ETSI, ANSI, ATM Forum .) SS#7 - Broadband-ISDN, Universal Mobile Telecommunications System, Broadband-IN.
SS#7
- SP (Signalling Point) - , SS#7.
- SL (Signalling Link) - .
- STP (Signalling Transfer Point) - , SS#7.
- (Associated Mode) - (Quasi-Associated Mode) - 3 3 .
3.
.
- MTP (Message Transfer Part) SS#7, .
- UP (User Parts) SS#7, . :
TUP- TelephoneUserPart
ISUP- ISDNUserPart
MAP - Mobile Application Part
SS#7 . 4. . 5 / :
IAM (Initial Address Message) - ;
SAM (Subsequent Address Message) - , ;
ACM (Address Complete Message) - (, );
ANC (Answer Charge) - ;
CLF (Clear Forward) - ;
RLG (Release Guard) - , .
4.
SS#7.
5.
/ SS#7.
, , MSU (Message Signal Unit) , .6.
6.
.
Signalling Information Field (SIF) - , MTP.
Service Information Octet (SIO) - .
Length Indicator (LI) - LI .
Check bits (CK) - .
Error correction - HDLC .
Flag (F) - .
, , :
1. ;
2. ;
3. ;
4. .
- . SS#7 (. 7).
(11)
7.
.
CCITT SS#7 OSI
SS#7 CCITT 1980 Q.700 ( ). ISO ( OSI). OSI SS#7 . 8.
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8.
SS#7 OSI.
SS#7 . 1984 , CCITT SS#7, OSI , . SCCP (Signalling Connection Control Part) TCAP (Transaction Capabilities Application Part), SS#7 , OSI. SS#7 MAP (Mobile Application Part) INAP (Intelligent Network Application Protocol), .
SS#7 DSSS#1
SS#7 ISDN . , CCITT Q.900, Digital Subscriber Signalling System No. 1 (DSSS#1). D-. ISDN 2B+D. ISDN 64 / () 16 /. D- LAPD.
SS#7, DSSS#1 . Q.2900 DSSS#2.
6.5 ISDN