04 Detroit, MI WP 9-15-04.qxd 9/15/2004 2:39 PM Page 3 Telephone Provider Information Directory Advertising Services (White & Yellow Pages) Advertising Inquiries...800-647-9000* Local Sales Office...800-249-4449* For Additional Directories...800-346-4377* Additional Customer Services Michigan Relay Center (TTY/Voice)...711 or 800-649-3777* Directory Assistance - Local & National...1 + 555-1212* Buried Cable Miss Dig...800-482-7171* *To better serve our customers, calls to these telephone numbers may be monitored by supervisory personnel. Pay Phone Sales, Service & Repair 800-809-0878* 800-223-4507 800-333-0309 800-238-9716 Annoyance Calls 800-769-4099* 800-222-0300 888-747-4638 800-393-1413 800-695-6955 800-291-9699 888-575-6398 877-ASK-ZTEL Corporate Headquarters 800-257-0902* 212-387-5400 517-324-8940 800-825-4545 800-393-1413 877-762-8835 214-495-4700 800-291-9699 703-547-2000 813-273-6261 For Numbers Not Shown Above 800-222-0300 888-747-4638 800-825-4545 800-600-3008 888-449-4940 800-291-9699 877-617-2111 877-ASK-ZTEL Other Services & Numbers Local Calling Area Information 800-480-8088* 800-254-8442 877-267-3266 800-374-5364 800-393-1413 877-619-3969 888-428-3288 877-617-2111 www.sbc.com/lca www.core.com www.ldmi.com www.mci.com www.mcleodusa.com www.navtel.com www.talk.com www.xo.com Large Business Services Number of Lines 20 or more 20 or more 20 or more 20 or more Sales 800-480-8088* 800-222-0400 877-582-0050 888-827-5364 800-465-7187 800-393-1413 877-628-0035 888-226-2121 888-428-3288 877-617-2111 Customer Service 800-480-8088* 800-524-2455 888-747-4638 800-374-5364 800-749-0800 800-393-1413 877-628-0035 877-619-3969 800-291-9699 888-575-6398 Repair 800-480-8088* 800-222-3000 888-747-4638 800-374-5364 800-749-0800 800-393-1413 888-562-8835 877-619-3969 800-291-9699 888-575-6398 Bill Inquiries 800-480-8088* 800-524-2455 888-747-4638 800-374-5364 800-749-0800 800-393-1413 877-619-3969 800-291-9699 888-575-6398 Number of Lines 1-19 1-19 1-19 1-3 1-19 Sales 800-660-3000* 800-222-0400 877-267-3266 888-827-5364 800-436-4444 800-393-1413 877-628-0035 800-418-6025 888-226-2121 888-428-3288 877-617-2111 800-371-3794 Customer Service 800-660-3000* 800-524-2455 888-747-4638 800-374-5364 800-749-0800 800-393-1413 877-628-0035 800-418-6020 877-619-3969 800-291-9699 888-575-6398 877-504-8067 Repair 800-727-2273* 800-222-3000 888-747-4638 800-374-5364 800-749-0800 800-393-1413 888-562-8835 800-418-6020 877-619-3969 800-291-9699 888-575-6398 877-504-8067 Bill Inquiries 800-660-3000* 800-524-2455 888-747-4638 800-374-5364 800-749-0800 800-393-1413 800-418-6020 877-619-3969 800-291-9699 888-575-6398 877-504-8067 Local Calling Area Information 800-660-3000* 800-254-8442 877-267-3266 800-374-5364 800-393-1413 877-619-3969 888-428-3288 877-617-2111 www.sbc.com/lca www.core.com www.ldmi.com www.mci.com www.mcleodusa.com www.navtel.com www.ustel.com www.talk.com www.xo.com Small Business Services Repair 800-515-7272* 800-222-0300 888-747-4638 877-595-5364 800-444-3333 800-909-5161 800-695-6955 888-562-8835 800-275-8223 888-449-4940 800-291-9699 877-ASK-ZTEL Home Office Telecom Center 800-967-5543* 800-222-0400 877-267-3266 877-595-5364 800-909-5161 888-449-4940 800-291-9699 Special Needs Equipt. (TTY/Voice) 800-433-8505* 800-833-3232 877-595-5364 800-374-4833 800-909-5161 888-449-4940 877-536-7968 Service Assistance Programs 800-621-8650* 800-872-3883 877-595-5364 800-909-5161 888-449-4940 800-552-3467 Automated Account Balances 800-207-2228* 800-430-1367 800-444-3333 800-909-5161 800-695-6955 800-418-6050 800-291-9699 877-ASK-ZTEL Automated Ordering Service 800-331-5454* 800-909-5161 800-418-6040 800-291-9699 Local Calling Area Information 800-244-4444* 800-222-0300 877-267-3266 877-595-5364 800-909-5161 www.ustel.com 888-449-4940 800-291-9699 877-ASK-ZTEL www.sbc.com/lca www.core.com www.ldmi.com www.mci.com www.mcleodusa.com www.navtel.com www.reconex.com www.talk.com www.ztel.com Sales 800-244-4444* 877-267-3266 888-827-5364 800-444-3333 800-909-5161 800-695-6955 888-662-8835 800-732-6639 888-972-7243 800-291-9699 877-BE-SMART Customer Service 800-244-4444* 800-222-0300 888-747-4638 877-595-5364 800-444-3333 800-909-5161 800-695-6955 888-662-8835 800-275-8223 888-449-4940 800-291-9699 877-ASK-ZTEL Bill Inquiries 800-244-4444* 800-222-0300 888-747-4638 877-595-5364 800-444-3333 800-909-5161 800-695-6955 800-275-8223 888-449-4940 800-291-9699 877-ASK-ZTEL Home Services (Residential) SBC AT&T CoreComm LDMI Telecommunications MCI For further information regarding telecommunication and telephone services, look in the SBC Yellow Pages under Telephone Companies McLeodUSA Metro Teleconnect Navigator Telecommunications 1-800-RECONEX Sage Telecom Talk America XO Communications Z-Tel Commumunications Telephone Services - Provider Information 3 AMERITECH PUBLISHING, INC. 2004

04 Detroit, MI WP 9-15-04.qxd 9/15/2004 2:39 PM Page 4 Billing & Payments/Dialing Instructions Telephone Services - Billing & Payments/ Dialing Instructions BILLING & PAYMENTS 1. How your bill is compiled Local service is billed one month in advance. Long distance and other service charges are billed for the past month. 2. Paying your bill You may pay your bill by mail or possibly in person. To locate the nearest bill payment location, call the appropriate telephone number for your local service provider listed on the Telephone Provider Information page. Always note your area code and phone number on the check. When paying by mail, return the remittance portion of your bill and your check to your local service provider at the appropriate address. You are responsible for payment of all charges, including any calls originating from or accepted at your premises and billed to you through your calling card. 3. If you can t pay on time Call the appropriate billing telephone number for your local service provider listed on the Telephone Provider Information page. Your local service provider may be able to help you. You may avoid having your phone disconnected. 4. Disconnection of service Before telephone service is to be disconnected, a notice will be sent by first class mail. The notice will be mailed to you at least five days prior to the disconnect date. Before your service can be reconnected, you should call the appropriate billing telephone number for your local service provider listed on the Telephone Provider Information page to discuss payment of undisputed charges billed. To re-establish service, a deposit may be required. There may also be a charge to reconnect service. Telephone Service Provider Billing And Payment Information SBC Bill Payment Center Saginaw, MI 48663-0003 AT&T Residential Customers Call 800-222-0300 for billing information Business Customers Mail your bill payment to AT&T, P.O. Box 27-680, Kansas City, MO 64180-0680 CoreComm P.O. Box 2570 Cincinnati, OH 45274-2570 LDMI Telecommunications Dept. 77609, P.O. Box 77000 Detroit, MI 48277-0609 MCI Residential Customers Call 800-444-3333 for billing questions Business Customers call 800-436-4444 for billing information. McLeodUSA Residential & Business Customers Call the 800 number on your invoice for billing information. Mail your bill payment to P.O. Box 3243 Milwaukee, WI 53201-3243 Metro Teleconnect P.O. Box 67070 Harrisburg, PA 17106 Navigator Telecommunications Mail your payments to: P.O. Box 13860, North Little Rock, AR 72113-0860 Residential Customers call 888-662-8835 Business Customers call 877-628-0035 1-800-RECONEX P.O. Box 40 Hubbard, OR 97032 800-275-8223 Sage Telecom Mail bill payments to P.O. Box 79051 Phoenix, AZ 85062-9051 Residential Customers Call 888-449-4940 for billing questions Business Customers Call 877-619-3969 for billing questions Talk America P.O. Box 2356 Omaha, NE 68103-2356 XO Communications Mail your bill payment to P.O. Box 828618 Philadelphia, PA 19182-8618 SERVICE ASSISTANCE PROGRAMS HELP FOR LOW INCOME FAMILIES Your local telephone company offers telephone assistance programs to reduce the price of local telephone service for residence customers. Customers who receive aid from the Family Independence Agency, or have a household income equal to, or lower than 150% of the federal income poverty level qualify. For information about telephone assistance eligibility, and application procedures, please contact your local telephone company at the number listed for Service Assistance Programs on the Telephone Provider Information page. DIALING INSTRUCTIONS Directory Assistance When you can t find a number or the listing is new, Directory Assistance can help you. A charge may apply on calls to Directory Assistance. Rates are determined by the company that provides the service. Customers desiring more than one listing per call should inform the operator at the beginning of the call. For local and national numbers Dial 1 + 555-1212 For 800, 866, 877, and 888 numbers Dial 1 + 800 + 555-1212 Dialing Instructions continued on next page Z-Tel Communications, Inc. Residential Customers Call 877-ASK-ZTEL for billing information Business Customers Mail your bill payment to P.O. Box 17286, Baltimore, MD 21297-1286 AMERITECH PUBLISHING, INC. 2004 4

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EXHIBIT AT-12 CONFIDENTIAL

1 Background Internet Voice, also known as Voice over Internet Protocol (VoIP), is a technology that allows you to make telephone calls using a broadband Internet connection instead of a regular (or analog) phone line. Some services using VoIP may only allow you to call other people using the same service, but others may allow you to call anyone who has a telephone number - including local, long distance, mobile, and international numbers. Also, while some services only work over your computer or a special VoIP phone, other services allow you to use a traditional phone through an adaptor. How VoIP / Internet Voice Works VoIP converts the voice signal from your telephone into a digital signal that travels over the Internet. If you are calling a regular phone number, the signal is then converted back at the other end. Internet Voice can allow you to make a call directly from a computer. If you make a call using a phone with an adaptor, you ll be able to dial just as you always have, and the service provider may also provide a dial tone. If your service assigns you a regular phone number, then a person can call you from his or her regular phone without using special equipment. What Kind of Equipment Do I Need? A broadband Internet connection is required to make VoIP calls. Some services allow you to use a regular telephone, as long as you connect it to an adaptor. Some companies allow you to make calls from a computer or a VoIP phone that doesn t require an additional adapter. If you are calling a regular telephone number, the person you are calling does not need any special equipment, just a phone. If I have VoIP Service, Whom Can I Call? Depending upon your service, you might be limited only to other subscribers to the service, or you may be able to call any phone number, anywhere in the world. The call can be made to a local number, a mobile phone, a long distance, or an international number. What Are Some Advantages of VoIP? Because VoIP is digital, it may offer features and services that are not available with a traditional phone. If you have a broadband Internet connection, you need not maintain and pay the additional cost for a line just to make telephone calls. Does My Computer Have to be Turned On? Not if you are making calls with a phone and adaptor or special VoIP phone, but your broadband Internet connection needs to be active. You can also use your computer while talking on the phone. (More)..... Federal Communications Commission Consumer & Governmental Affairs Bureau 445 12th St., SW Washington, DC 20554 1-888-CALL-FCC (1-888-225-5322) TTY:. 1-888-TELL-FCC (1-888-835-5322). Fax: 1-866-418-0232 www. fcc. gov/ cgb

2 Is There a Difference Between Making a Local Call and a Long Distance Call? Some VoIP providers offer their service for free, normally only for calls to other subscribers to the service. Some VoIP providers charge for a long distance call to a number outside your calling area, similar to existing, traditional wireline telephone service. Other VoIP providers permit you to call anywhere at a flat rate for a fixed number of minutes. Your VoIP provider may permit you to select an area code different from the area in which you live. This means that if your provider charges for long distance, then charges could be based on whether you call within your area code rather than geographic area. It also means that people who call you may incur long distance charges depending on their area code and service. Can I Take My Phone Adapter With me When I Travel? You may be able to use your VoIP service wherever you travel as long as you have a broadband Internet connection available. In that case it would work the same as in your home. How Do I Know If I have a VoIP Phone Call? The phone will ring like any other call. Does the FCC Regulate Internet Voice? The Federal Communications Commission (FCC) has worked to create an environment promoting competition and innovation to benefit consumers. Historically, the FCC has not regulated the Internet or the services provided over it. (More) On February 12, 2004, the FCC found that an entirely Internet-based VoIP service was an unregulated information service. On the same day, the FCC began a broader proceeding to examine what its role should be in this new environment of increased consumer choice and what it can best do to meet its role of safeguarding the public interest. Additional Considerations If you re considering replacing your traditional telephone service with VoIP, there are some possible considerations you should be aware of: Some VoIP services don t work during power outages and the service provider may not offer backup power; It may be difficult for some VoIP services to seamlessly connect with the 911 emergency dispatch center or to identify the location of VoIP 911 callers; VoIP providers may or may not offer directory assistance/white page listings. Aspects of these considerations may change with new development in Internet Voice technology. You should always check with the potential VoIP service provider to confirm any advantages and limitations to their service. Where to Go for Additional Information and Assistance For further information about VoIP, please visit the FCC s Consumer & Governmental Affairs Bureau at www.fcc.gov/voip. ### For this or any other consumer publication in an accessible format (electronic ASCII text, Braille, large print, or audio), please write or call us at the address or phone number below, or send an e-mail to FCC504@fcc.gov. To receive information on this and other FCC consumer topics through the Commission's electronic subscriber service, click on www.fcc.gov/cgb/emailservice.html. 040211 This document is for consumer education purposes only and is not intended to affect any proceeding or cases involving this subject matter or related issues...... Federal Communications Commission Consumer & Governmental Affairs Bureau 445 12th St., SW Washington, DC 20554 1-888-CALL-FCC (1-888-225-5322) TTY:. 1-888-TELL-FCC (1-888-835-5322). Fax: 1-866-418-0232 www. fcc. gov/ cgb