Partner MLS-34D Style TelephoneKey Features of Partner MLS-34D This Partner MLS-34D Display Telephone has 16 programmable buttons with dual LEDs for line or feature appearance.2 Line by 16 Character Multilingual Display, and 4 flex keys under the displays.Business telephone set has fixed feature buttons for Conference, Transfer, and Hold.Partner MLS-34D has 2-Way Intercom and 2-Way speaker phone.Message waiting light indicates messages in your voice mailExtra Port allows connection to other standard devices, such as modems or fax machinesVolume Controls for Handset, Speaker, and RingerWorks with all releases of the Avaya Partner business telephone system family.