[Asterisk-Users] What is the best client's protocol for my softphones

[Kumara Jayaweera]

Hi all,
    What is the best client's protocol for my softphones in Windows pcs? and
    what is the best way for connecting clients, I meant should I use one
    protocol for all the clients or some mix (SIP/IAX/oh323) of protocols?
what
    is better?
    Thanks in advance
    Kumara
Sorry, I could not change the sub in previous one.