Edit in JSFiddle

var contact1Model = new Backbone.Model({
    firstName: 'John',
    lastName: 'Doe',
    phone: '1-111-1111'
});

var contact2Model = new Backbone.Model({
    firstName: 'Jane',
    lastName: 'Doe',
    phone: '2-222-2222'
});
//create a collection, pass in two models
var contacts = new Backbone.Collection([contact1Model, contact2Model]);

console.log(contacts.models); //logs array containing models