2wire (1000-000057-000) Modem "att home phone line" Questions

...att.com to chat with the technician and a technician came to my house and check my modem. But he said that my modem's working fine. Sometimes when I closed all my downloading softwares the modem will ...

...there a phone line/data cable with my att 2wire modem if I do not have home phone service available? Is a filter to split signals for the phone device and for the modem, if it is like in the