public function getPhonebook()
    {
        $entries = Connection::sendCurlRequest(Connection::URL_PHONEBOOK . '_' . $this->iden, 'GET', null, false,
            $this->apiKey)->phonebook;

        $objEntries = [];
        foreach ($entries as $e) {
            $objEntries[] = new PhonebookEntry($e, $this);
        }

        return $objEntries;
    }