So apparently both of our conference phones ONLY work with an analog phone line. Now luckily, the majority of rooms on campus have analog phone jacks, so this is fine. If someone has trouble with a phone, Telephone Services does have an adapter (DONGLE!) that will make it work with a digital jack. As a result of all of this, we have removed any analog/digital designation on the phones – for all intents and purposes, they are identical.