[Linphone-users]two questions about linphonec

[Franklin]

Hello: 

I am reading the console version of linphone--linphonec and have two 
questions need your help. 

1)When the user types in "c", linphonec uses linphone_core_invite to send 
sip message to the called party. But I can't see how the calling party wait 
for the message from the called party and which function it uses to open the

soundcard and send/receive the rtp stream. 
2) The are two kind of sound card linphonec support:oss card and Alsa. Thay 
are encapsulated in the osscard.c amd alsacard.c respectively. How wil 
linphonec decide which kind of card is in use and then used the API 
accordingly? 

Thank you very much in advance. 

Bestwishes 
Franklin