Integrated Services Digital Network (ISDN) User Part (ISUP) to Session Initiation Protocol (SIP) Mapping
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Auteur(s) :
L. Ong,
J. Peterson,
G. Camarillo,
A. B. Roach
Classé sous :
Pstn,
Signaling system no. 7,
Ss7,
Public switched telephone network
RFC 3398 ISUP to SIP Mapping December 2002
10. Upon receipt of the 487, the SIP node will confirm reception
with an ACK.
7.2 State Machine
Note that REL can be received in any state; the handling is the same
for each case (see Section 10).
+---------+
+----------------------->| Idle |<---------------------+
| +----+----+ |
| | |
| | INVITE/6.2.1 |
| V |
| T7/6.2.2 +-------------------------+ REL/6.2.4 |
+<----------------+ Trying +------------>+
| +-+--------+------+-------+ |
| CANCEL/6.2.3 | | | | |
+<----------------+ | E.ACM/ | ACM/ | CON/ANM |
| | 6.2.5 |6.2.6 | 6.2.7 |
| V | | |
| T9/6.2.8 +--------------+ | | |
+<----------+ Not alerting | | | |
| +-------+------+ | | |
| CANCEL/6.2.3 | | | | |
|<--------------+ | CPG/ | | |
| | 6.2.9 | | |
| V V | |
| T9/6.2.8 +---------------+ | REL/6.2.4 |
+<----------------+ Alerting |-|-------------------->|
|<----------------+--+-----+------+ | |
| CANCEL/6.2.3 | ^ | | |
| CPG/ | | | ANM/ | |
| 6.2.9 +--+ | 6.2.7 | |
| V V |
| +-------------------------+ REL/9.2 |
| | Waiting for ACK |------------>|
| +-------------+-----------+ |
| | |
| | ACK/6.2.10 |
| V |
| BYE/9.1 +-------------------------+ REL/9.2 |
+<----------------+ Connected +------------>+
+-------------------------+
Camarillo, et. al. Standards Track [Page 18]