IMS P-CSCF Proxy Call State Control Function

- details for the function, operation and implementation of the IMS P-CSCF, Proxy Call State Control Function.

The P-CSCF is the user to network proxy. In this respect all SIP signalling to and from the user runs via the P-CSCF whether in the home or a visited network.

P-CSCF basics

When any user registers with the IMS network, the registration signalling will pass through the P-CSCF.

For instances where a subscriber has more than one active terminal, these may communicate and pass registration requests through different P-CSCFs, but the same S-CSCF will always be used. This is because the HSS will provide data to use the same S-CSCF regardless of which I-CSCF presents the requests.

By Ian Poole

<< Previous   |   Next >>

Share this page

Want more like this? Register for our newsletter

A medal for mobile medicine? Rudy Ramos | Mouser Electronics
A medal for mobile medicine?
Medical services the world over are coming under great pressure to deliver high-quality healthcare and, at the same time control costs. Alongside this, patients are becoming far more involved in their wellbeing as well as wanting a high standard of healthcare with even greater convenience than before. As people are more mobile these days, mobile healthcare (mHealth) avoids the need to visit the doctor’s office and allows patients to provide health data to providers, as well as receive care, anywhere on the planet.

Forthcoming Events

    . . . . More Events is operated and owned by Adrio Communications Ltd and edited by Ian Poole. All information is © Adrio Communications Ltd and may not be copied except for individual personal use. This includes copying material in whatever form into website pages. While every effort is made to ensure the accuracy of the information on, no liability is accepted for any consequences of using it. This site uses cookies. By using this site, these terms including the use of cookies are accepted. More explanation can be found in our Privacy Policy