.25, , . , , : - ISDN .25 1997 ., - : 2 /, m=32768, , - HDLC, PAD-, -, .164.
. . .25 . - : DTE - . , n×64 /, - 9,6 - 48 /, ISDN - 128, 384, 1536 1920 /. , .25 , : 2,4-2048 /.
.25 . , ( ) . 0,6 ( ). - , , .
.25 TCP/IP, , . : TCP/IP , .25
. , .25 IP-, - IP .25, 1.25. .25 IP , .
.25, FR, ATM, IP, ISDN .25 , .
.25 Ethernet () (NM) (TMN) SDH. -, , IBM SUN, .
1.25 TCP/IP .25, IP , "-".
-----------------------------------
4-1. .25?
4-2. OSI .25?
4-3. NACK .25?
4-4. .25?
4-5. .25?
4-6. .25?
4-7. .25 ?
4-8. LAPB?
4-9. , ?
4-10. .25?
4-11. .25?
4-12. ( .25), ?
4-13. .25?
4-14. .25?
4-15. ., .28, .29 .75?
5