Ok, So, I'm willing to isntall ip phones, I have, to choise: snom 200 cisco phones alcatel phones... snom 200, not in mexico,must import. cisco phone, in mexico, quite expensive, protocl to use; sip alcatel, in mexico, no so expensive, protocol to use: h323 Asteris, which protocol support better? Sip o H323? Any advice is welcome... :)