I have called them before late at night, it was just after we got out of sleep school - we actually called the sleep school first but were told, 'We're busy, you'll have to call back tomorrow.' How great that is for a mum in distress I tell you... so we called the MCHN line and yes it was busy. I should have hung up though, as all they told me was it was perfectly fine for my child to cry for two hours straight and that was it. That was the night we stopped taking everyone's advice and co-slept - there was no support or worthwhile advice out there for us.