import pjsua


class MyAccountCallback(pjsua.AccountCallback):
    def __init__(self, account=None):
        pjsua.AccountCallback.__init__(self, account)

    def on_incoming_call(self, call):
        call.hangup(501, "Sorry, not ready to accept calls yet")

    def on_reg_state(self):
        print "Registration complete, status=", self.account.info().reg_status, \
              "(" + self.account.info().reg_reason + ")"

sip_url="sip.nextfone.com.bd"
sip_username="09614449000"
sip_password="45621548649"
lib = pjsua.Lib()

acc_cfg = pjsua.AccountConfig(sip_url, sip_username, sip_password)

acc_cb = MyAccountCallback()
acc = lib.create_account(acc_cfg, cb=acc_cb)