Bug 971484 - [System2] Instantiable DialerComms r=alive

https://bugzilla.mozilla.org/show_bug.cgi?id=971484

Screenshot of JSDoc:

![screen shot 2014-02-13 at 10 53 50 am](https://f.cloud.github.com/assets/122602/2163532/64c16d12-94e0-11e3-923d-67dc53935a5c.png)