As far as I remember (but I can't find a source right now), this lack of interconnection between the emergency phone systems of the fire brigade and police is intentional. Some reasons for this are:
It can make it easier for people to call for medical help without having the police know about it (for example, if illicit substances are involved).
It frees up the operator and telephone lines, by not having to handle the transfer.
It does not indicate a lack of training of motivation on the operator's part.