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4.1.1.1 SIP Server Failover
Description
When communicating with a SIP server (e.g., when the V-SIPGW card is in INS status, when sending periodic
REGISTER requests), if the SIP server does not reply after sending the REGISTER/INVITE request, the
REGISTER/INVITE request is sent again using one of the following methods.
•
If a failover SIP server is registered, the REGISTER/INVITE request is sent to that server.
•
If a failover SIP server is not registered, a REGISTER/INVITE request is immediately sent to the destination
obtained from a DNS resolution of the registrar server name.
Conditions
•
The failover destination is decided based on the following order.
1.
The failover destination IP address of the SIP server/Registrar server
2.
DNS SRV record / A record round robin
•
If the above failover operation fails, communication is attempted over a public trunk rather than a SIP trunk.
Automatic Rerouting of SIP Trunk Calls to Public Trunks
When a SIP trunk call cannot be completed successfully, the PBX can automatically attempt to make the call
using a public trunk instead. This provides a backup method of making calls in cases when IP network
transmission cannot be completed successfully. For more information, refer to "4.3.2 Voice over Internet
Protocol (VoIP) Network—Automatic Rerouting of VoIP Calls to Public Trunks".
[Example]
PBX-1
PBX-2
Extn.1000
Extn.1011
(012-345-1011)
V-SIPGW
V-SIPGW
Dials
"012-345-1011".
IP Network
Telephone Company
(area code: 098)
Telephone Company
(area code: 012)
012-345-1011
Installation Manual References
4.4 Virtual Cards
8.4 SIP Trunks
PC Programming Manual References
9.10 PBX Configuration—[1-1] Configuration—Slot—Port Property—V-SIPGW—Main—
Address for Failover
9.10 PBX Configuration—[1-1] Configuration—Slot—Port Property—V-SIPGW—Register —
IP Address for Failover
9.10 PBX Configuration—[1-1] Configuration—Slot—Port Property—V-SIPGW—Option—
378
Feature Guide
4.1.1 SIP (Session Initiation Protocol) Trunk
Summary of Contents for KX-NS500
Page 14: ...14 Feature Guide Table of Contents...
Page 15: ...Section 1 For Your Safety Feature Guide 15...
Page 18: ...18 Feature Guide 1 1 1 For Your Safety...
Page 19: ...Section 2 Call Handling Features Feature Guide 19...
Page 57: ...632 Maximum Number of Agents Feature Guide 57 2 2 2 Incoming Call Distribution Group Features...
Page 107: ...User Manual References 1 2 1 Basic Calling Feature Guide 107 2 5 4 Trunk Call Features...
Page 193: ...User Manual References 1 4 2 Holding a Call Feature Guide 193 2 13 1 Call Hold...
Page 324: ...324 Feature Guide 2 30 2 Outgoing Message OGM...
Page 325: ...Section 3 Unified Messaging System Feature Guide 325...
Page 375: ...Section 4 Network Features Feature Guide 375...
Page 464: ...464 Feature Guide 4 3 6 Network ICD Group...
Page 465: ...Section 5 System Configuration and Administration Features Feature Guide 465...
Page 560: ...560 Feature Guide 5 6 7 PING Confirmation...
Page 561: ...Section 6 Appendix Feature Guide 561...
Page 578: ...578 Feature Guide 6 5 2 PFMPR Software File Version 004 2xxxx...
Page 579: ...Feature Guide 579 Notes...