On 12/8/22 09:18, Mychaela Falconia wrote:
And how exactly do you propose implementing an actual
MT call (with MT
SETUP CC message to MS) on top of this silent-call logic? The moment
you send that MT SETUP message to an MS, that MS will respond with CALL
CONFIRM and other CC messages to follow - how are you going to handle
them? You will need at least some handling of CC messages from MS: if
the MS sends DTMF start, call hold or call modify messages, the network
MUST respond with either ACK or REJ, and then of course there is
graceful call disconnect and clearing. Likewise in the case of vty-
initiated "hang up" of these test calls, you will also need to send CC
DISCONNECT toward MS and then follow subsequent graceful call clearing
sequence. I invite you to look at the source for themwi-test-mtc as
an example.
The primary goal for me would be making the phone activate its
microphone and speaker, so that the associated RTP stream would carry
valid Uplink voice frames. I assume sending a CC SETUP message and
pressing the green button on the phone would be enough for that. The
subsequent Alerting and Connect messages from the MS can simply be
ignored for now.
This is not a complete solution, rather a quick hack that should be
relatively easy and quick to implement without touching the MNCC logic.
Best regards,
Vadim.
--
- Vadim Yanitskiy <vyanitskiy at sysmocom.de>
http://www.sysmocom.de/
=======================================================================
* sysmocom - systems for mobile communications GmbH
* Alt-Moabit 93
* 10559 Berlin, Germany
* Sitz / Registered office: Berlin, HRB 134158 B
* Geschaeftsfuehrer / Managing Director: Harald Welte