Merge "Do not inform user when the alpha identifier is a null data."

        ctlv = searchForTag(ComprehensionTlvTag.ALPHA_ID, ctlvs);

        if (ctlv != null) {

            textMsg.text = ValueParser.retrieveAlphaId(ctlv);

            // Assign the tone message text to empty string, if alpha identifier

            // data is null. If no alpha identifier tlv is present, then tone

            // message text will be null.

            if (textMsg.text == null) textMsg.text = "";

        }

        // parse tone duration

        ctlv = searchForTag(ComprehensionTlvTag.DURATION, ctlvs);