SBC as The
as a P-CSCF supports S-CSCF restoration procedures as defined in 3GPP TS 23.380. If the
SBC as as a P-CSCF does not receive any response to a SIP request, sent to the IMS core or if the next hop is blacklisted by
SBC’s the ’s Address Reachability Service (ARS), it rejects the request with a 504 (Server Time-out) response. The
SBC uses uses its path header as P-Asserted-Id header in the response message. The error response also carries MIME body type "application/3gpp-ims+xml" with the following content:
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The SBC supports IMS restoration procedures using the IP Signaling Profile flag supportSCSCFRestorationProcedures on ePSX or Support S-CSCF Restoration Procedures on an external PSX. The flag is disabled by default. When enabled, SBC the acting as P-CSCF rejects a request with 504 (Server Time-out) response carrying MIME body of type application/3gpp-ims+xml if SBC the does not receive a response to the request from S-CSCF network, or if the next hop address is blacklisted as part of ARS (Address Reachability Service) service. |
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For SBC configuration
configuration details, see:
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