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Back to SBC as P-CSCF

product

 as

 

SBC as a P-CSCF supports S-CSCF restoration procedures as defined in 3GPP TS 23.380.  If the SBC as

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 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

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’s Address Reachability Service (ARS), it rejects the request with a 504 (Server Time-out) response. The SBC uses

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 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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Excerpt The SBC Spacevars 0 product 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 Spacevars 0 product 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 Spacevars 0 product 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.

For SBC configuration

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 configuration details, seerefer to:

• commonIpAttributes Common IP Attributes - SIP - CLI
• Common Ip IP Attributes - Flags (EMA)

For PSX-related information, refer to the PSX documentation.

 

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