am 1733a3de: Merge "SIP addresses containing "911" shouldn\'t be considered...

        // If the number passed in is null, just return false:

        if (number == null) return false;

        // If the number passed in is a SIP address, return false, since the

        // concept of "emergency numbers" is only meaningful for calls placed

        // over the cell network.

        // (Be sure to do this check *before* calling extractNetworkPortionAlt(),

        // since the whole point of extractNetworkPortionAlt() is to filter out

        // any non-dialable characters (which would turn 'abc911def@example.com'

        // into '911', for example.))

        if (isUriNumber(number)) {

            return false;

        }

        // Strip the separators from the number before comparing it

        // to the list.

        number = extractNetworkPortionAlt(number);