A:AnswerHello! Teletypewriter is a system which provides a series of tones, which are converted to text through a device. Given this fact, it will work. -C
A:AnswerHello! With the Call screening feature, while a caller is leaving a message, you can listen to the call through the unit’s speaker. In order to turn it off, take a handset, press MENU, then press the # symbol, enter code 310 and choose the OFF option. Press SAVE and then the OFF button. This can be set for each unit. If you require further assistance, please contact the Support Team via Live Chat on the Panasonic Website, Contact Us option, Mon-Fri, 9am-5pm EST. -C
A:AnswerKindly be informed that the speaker on this model is standard, however it does have good-quality sound and volume. If you would like a telephone with volume boost, we would recommend you to check out our amplified systems as well. -M