ISUP (ISDN User Part)
Протокол прикладного уровня подсистемы ISDN (
ISDN
User
Part). Обеспечивает взаимодействие между телефонными коммутаторами для управления телефонными вызовами, а также услугами ISDN.
В качестве транспортного уровня может использовать:
Пример дешифрации
ISUP-R-2000: Russian specifications, 2001
8 ***b12** Circuit identification code... 284 Dec
0000.... Spare......................... 0
10 00000001 Message Type.................. INITIAL ADDRESS
-- Nature of connection indicators
11 ......00 Satellite ind................. No satellite circuit
....00.. Continuity check ind.......... Not required
...0.... Echo control device........... Not included
000..... Spare......................... 0
-- Forward call indicators
12 .......0 National/international ind.... National call
.....00. End-to-end method ind......... No method available
....1... Interworking ind.............. Encountered
...0.... End-to-end info ind........... Not available
..0..... ISDN user part ind............ Not used all the way
01...... ISUP preference ind........... Not required all the way
13 .......0 ISDN access ind............... Originating access non-ISDN
.....00. SCCP method ind............... No indication
00000... Spare......................... 0
-- Calling Party's Category
14 00001010 Category...................... Ordinary calling sub. cat. 1
-- Transmission medium requirement
15 00000011 Transmission medium req....... 3.1 kHz audio
16 00000010 Pointer....................... 2 Dec
17 00001010 Pointer....................... 10 Dec
18 00001000 Length........................ 8 Dec
-- Called Party Number
19 .0000011 Nature of address ind......... National (significant) number
1....... Odd/even ind.................. Odd
20 ....0000 Spare......................... 0
.001.... Numbering plan ind............ ISDN (Telephony)
1....... Internal network number ind... Routing not allowed
21 ***b44** Address signal................ 9062743318F
0000.... Filler........................ 0 Hex
27 00001010 Optional parameter............ Calling Party Number
28 00000111 Length........................ 7 Dec
-- Calling Party Number
29 .0000011 Nature of address ind......... National (significant) number
0....... Odd/even ind.................. Even
30 ......11 Screening ind................. Network provided
....00.. Presentation restricted ind... Presentation allowed
.001.... Numbering plan ind............ ISDN (Telephony)
0....... CallingPN incomplete ind...... Complete
31 ***B5*** Address signal................ 4712535130
36 00110001 Optional parameter............ Propagation Delay Counter
37 00000010 Length........................ 2 Dec
-- Propagation Delay Counter
38 ***b16** Propagation delay value....... 0 Dec
40 00111101 Optional parameter............ Hop Counter
41 00000001 Length........................ 1 Dec
-- Hop Counter
42 ...11111 Hop counter................... 31 Dec
000..... Spare......................... 0
43 00111001 Optional parameter............ Param Compatibility Info
44 00000100 Length........................ 4 Dec
-- Parameter Compatibility Information
45 00110001 Upgraded parameter............ Propagation Delay Counter
-- Instruction indicators
46 .......0 Transit at intermediate....... Transit interpretation
......0. Release call Ind.............. Don't release call
.....0.. Send notification Ind......... Don't send notification
....0... Discard message............... Don't discard message
...0.... Discard parameter............. Don't discard parameter
.10..... Pass on not possible ind...... Discard parameter
1....... Extension..................... Last octet
47 00111101 Upgraded parameter............ Hop Counter
-- Instruction indicators
48 .......0 Transit at intermediate....... Transit interpretation
......0. Release call Ind.............. Don't release call
.....0.. Send notification Ind......... Don't send notification
....0... Discard message............... Don't discard message
...0.... Discard parameter............. Don't discard parameter
.10..... Pass on not possible ind...... Discard parameter
1....... Extension..................... Last octet
49 00000000 Optional parameter............ End Of Optional Parameters
Фильтрация
Ссылки