Hi Zhnu,

Welcome to FS. I have tried HT503. It worked but I have issues with humming noise. I wouldn't recommend this. I haven't tried Obihai. 

Re controlling incoming calls from a computer. FS has a powerful module mod_event_socket. http://wiki.freeswitch.org/wiki/Event_Socket . You can create your script to do what you want. FS is really a telephony Swiss knife and I think there are other modules available. Just go over the Wiki.

Cheers,
/Nandy

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On Sat, Apr 6, 2013 at 1:50 AM, Zhnupy Gonzalez <zhnupy@gmail.com> wrote:
Hi
I'm a total newbie looking a way to controll PSTN calls from my computer, by control I mean:  see caller id on screen, answering with softh phone, pressing a button to play a song, that kind of stuff.
Is it possible with hardware like grandstream Ht503 or obihai OBi110 or do I need more (and more expensive) hardware?

regards
zhnu

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