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During Roaming in Volte/IMS Home Network P-CSCF will be used or visited network?

+2 votes
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During Roaming in Volte/IMS Home Network Proxy-Call Session Control Function (P-CSCF) will be used or visited network ?

posted May 15, 2014 by Pardeep Kohli

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Incase of roaming Volte/IMS, Visited P-CSCF has to be used.

1 Answer

+1 vote

Will give you just an overview. In VoLTE roaming scenario, P-CSCF is of visited network and S-CSCF will always be of home network0 like PGW.

The SIP REGISTER request shall include a header P-Visited-network PLMN-id. This parameter is used to check if there is a roaming agreement between home network and the network represented by that PLMN-id.

answer May 16, 2014 by Rahul Vaidya
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