Снял трассировку звонка c SIP номера 733 на номер инфры 418.
ie 0x04 Bearer capability: 90 90 A3
Coding: CCITT standardized
Information transfer capability: 3.1 kHz audio
Transfer mode: Circuit mode
Transfer rate: 64 Kbit/s
User info layer 1: G.711 A-law
ie 0x18 Channel identification: A3
Interface identifier: Implicit
Interface type: Primary rate
Indicated channel: Preferred
D-channel identified: No
Information channel selection: any channel
ie 0x1E Progress indicator: 85 83
Coding: CCITT standardized
Location: Private network serving the remote user
Progress: Origination address is non-ISDN
ie 0x6C Calling party number: 09 80 37 33 33
Number type: Unknown
Numbering plan: Private
Presentation: presentation allowed
Screening: user-provided, not screened
Number: 733
ie 0x70 Called party number: 89 34 31 38
Number type: Unknown
Numbering plan: Private
Number: 418
ISDN3_00051 23/08 10:43:07 RX d_channel: 112 (S:00 T:000) payload: (10) 08 02 80 4E 02 18 03 A9 83 81
0x02 CALL_PROCEEDING Ref: D,78
ie 0x18 Channel identification: A9 83 81
Interface identifier: Implicit
Interface type: Primary rate
Indicated channel: Exclusive
D-channel identified: Yes
Information channel selection: B1 channel
Coding: CCITT standardized
Channel type: B-channel units
Channel number: 0x01
HIS_00052 Event 224 on slot 80, access: 255
on 23.08 at 10:43:07 (88349841)
Info: C0 A8 00 02
ISDN3_00053 23/08 10:43:07 RX d_channel: 112 (S:00 T:000) payload: (9) 08 02 80 4E 01 1E 02 80 88
0x01 ALERTING Ref: D,78
ie 0x1E Progress indicator: 80 88
Coding: CCITT standardized
Location: User
Progress: In-band information or appropriate pattern now available
ISDN3_00054 23/08 10:43:07 RX d_channel: 112 (S:00 T:000) payload: (5) 08 02 80 4E 07
0x07 CONNECT Ref: D,78
ISDN3_00055 23/08 10:43:07 TX d_channel: 112 (S:00 T:000) payload: (5) 08 02 00 4E 0F
0x0F CONNECT_ACK Ref: O,78
ISDN3_00056 23/08 10:43:07 RX d_channel: 112 (S:00 T:000) payload: (9) 08 02 80 4E 45 08 02 80 90
0x45 DISCONNECT Ref: D,78
Все в роде верно, в процессе нашелся шлюз (HIS_00052 Event 224 on slot 80, access: 255
on 23.08 at 10:43:07 (88349841)
Info: C0 A8 00 02),
т.к. у него до звонка не было сети.
Сравнивал данную трассировку с номера 733 на номер инфры 460, различий не видно, кроме № сессий.