+----------------+
                            |                |
                            |     Signaling  |
                            |     Server     |
                            |                |
                            +----------------+
                                ^        ^
                               /          \
                       HTTPS  /            \   HTTPS
                             /              \
                            /                \
                           v                  v
                        JS API              JS API
                  +-----------+            +-----------+
                  |           |    Media   |           |
            Alice |  Browser  |<---------->|  Browser  | Bob
                  |           | (DTLS+SRTP)|           |
                  +-----------+            +-----------+
                        ^      ^--+     +--^     ^
                        |         |     |        |
                        v         |     |        v
                  +-----------+   |     |  +-----------+
                  |           |<--------+  |           |
                  |   IdP1    |   |        |    IdP2   |
                  |           |   +------->|           |
                  +-----------+            +-----------+