Howto:Overlap dialing in SIP
Overlapping INVITE Transactions
The INVITE transaction with incomplete destination number hangs out until replaced by a new INVITE transaction.
A new (replacing) INVITE transaction causes the existing one to be terminated with "484 Address Incomplete".
Conv.| Time | 172.16.16.109 | 172.16.16.180 | 172.16.16.107 |
0 |8,363 | INVITE SDP () | |SIP From: sip:IP230-1b-00-24@innovaphone.de To:sip:2@innovaphone.de
| |(2060) ------------------> (5060) | |
0 |8,546 | 100 Trying| | |SIP Status
| |(2060) <------------------ (5060) | |
0 |10,275 | INVITE SDP () | |SIP From: sip:IP230-1b-00-24@innovaphone.de To:sip:20@innovaphone.de
| |(2060) ------------------> (5060) | |
0 |10,278 | 484 Address Incomplete | |SIP Status
| |(2060) <------------------ (5060) | |
0 |10,282 | ACK | | |SIP Request
| |(2060) ------------------> (5060) | |
0 |10,466 | 100 Trying| | |SIP Status
| |(2060) <------------------ (5060) | |
0 |12,455 | INVITE SDP () | |SIP From: sip:IP230-1b-00-24@innovaphone.de To:sip:207@innovaphone.de
| |(2060) ------------------> (5060) | |
0 |12,458 | 484 Address Incomplete | |SIP Status
| |(2060) <------------------ (5060) | |
0 |12,462 | ACK | | |SIP Request
| |(2060) ------------------> (5060) | |
-----------------------------------------------------------------------------
1 |12,469 | | INVITE SDP () |SIP From: sip:anonymous@172.16.16.180 To:sip:207@172.16.16.180
| | |(2059) ------------------> (2051) |
-----------------------------------------------------------------------------
0 |12,646 | 100 Trying| | |SIP Status
| |(2060) <------------------ (5060) | |
-----------------------------------------------------------------------------
1 |13,504 | | 180 Ringing |SIP Status
| | |(2059) <------------------ (2051) |
-----------------------------------------------------------------------------
0 |13,508 | 180 Ringing | |SIP Status
| |(2060) <------------------ (5060) | |
-----------------------------------------------------------------------------
1 |15,690 | | 200 OK SDP () |SIP Status
| | |(2059) <------------------ (2051) |
1 |15,695 | | ACK | |SIP Request
| | |(2059) ------------------> (2051) |
-----------------------------------------------------------------------------
0 |15,699 | 200 OK SDP () | |SIP Status
| |(2060) <------------------ (5060) | |
0 |15,718 | ACK | | |SIP Request
| |(2060) ------------------> (5060) | |
-----------------------------------------------------------------------------
1 |16,598 | | BYE | |SIP Request
| | |(5060) <------------------ (2155) |
1 |16,600 | | 200 OK | |SIP Status
| | |(5060) ------------------> (2155) |
-----------------------------------------------------------------------------
0 |16,602 | BYE | | |SIP Request
| |(2060) <------------------ (5060) | |
0 |16,607 | 200 OK | | |SIP Status
| |(2060) ------------------> (5060) | |