You will experience the following ring patterns with Teen or Fax Line Service:

Your main number will ring one long ring.

Your other number will ring two short  rings.

Wait until the full ringing pattern is complete before answering your telephone, so you know which telephone number was dialed.

When providing your telephone number to others, be sure to just give the telephone number designated for their calls (for example, children's or Fax number instead of main number).

IMPORTANT FEATURES

You are given a directory listing for each telephone number.

Although you have two telephone numbers, you have just one line, and only one conversation can be held at a time. (But if you have Three-Way Calling, you can talk with two other parties at once, provided you originate the second call.)
The calling party hears normal ringing, not the Multi-Ring Service ring.