SIP P-Early-Media and SS7 UID Parameters Interworking
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3GPP TS 29.163 is the latest of the interworking standards between ISUP and SIP. It is closely aligned with ITU-T Q.1912.5, but also supports some additional interworking use cases and supplementary services. On the SIP side, conventions of IMS SIP are often used.
This feature will add the interworking of the SIP P-Early-Media versus the SS7 UID parameters (capability/action indicators).
Call Flow Diagrams
The call flows displayed below are the supported call flows interworking of the SIP P-Early-Media versus the SS7 UID parameters (capability/action indicators).
SIP to SS7 call
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SS7 to SIP call
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Configuration
SIP configuration is done in SIP Profile - Headers:
Set the P-Early-Media Support to "Relay".
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