'Check an incoming subnegotiation block. The parameter already has
cut off the header like sub option number and com port option value.'

def check_answer(self, suboption):

    if (self.value == suboption[:len(self.value)]):
        self.state = ACTIVE
    else:
        self.state = REALLY_INACTIVE
    if self.connection.logger:
        self.connection.logger.debug('SB    Answer    {}    ->    {!r}    ->    {}'.format(self.name, suboption, self.state))
