Initiate call to engaged party

Three devices A B C with Release Candidate installed and running, set up with the following Phone Numbers and Names:
- 55501 TestA
- 55502 TestB
- 55503 TestC
Ensure that the peer list (Serval main screen → Contacts → List Phones On The Mesh) on each phone shows the other two devices
On device A, go to peer list: Serval main screen → Contacts → List Phones On The Mesh and press the TestB entry call icon (green telephone)
On device B, press Answer button
Ensure Device A Serval call screen shows In Call above Serval logo, TestB 55502 below Serval logo and three buttons at bottom: Speaker, End Call and Dialpad
Ensure Device B Serval call screen shows In Call above Serval logo, TestA 55501 below Serval logo and three buttons at bottom: Speaker, End Call and Dialpad

On device C, go to peer list: Serval main screen → Contacts → List Phones On The Mesh and press the TestA entry call icon (green telephone)
ASSERT Device C shows Calling above Serval logo, TestA 55501 below Serval logo and three buttons at bottom: Speaker, End Call and Dialpad
ASSERT After a few seconds, device C changes to Call Ended above Serval logo
ASSERT Devices A and B continue their In Call screens with voice transmission
On device C, press End Call button
ASSERT Device C returns to peer list with entries for TestA and TestB
On device C, press the TestB entry call icon (green telephone)
ASSERT Device C shows Calling above Serval logo, TestB 55502 below Serval logo and three buttons at bottom: Speaker, End Call and Dialpad
ASSERT After a few seconds, device C changes to Call Ended above Serval logo
ASSERT Devices A and B continue their In Call screens with voice transmission

Hang up the calls on devices A and B. Any failure in this process should be reported under the appropriate test case:
- Calling party hangs up call
- Called party hangs up call

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