Illinois

• Section - 1 Preface

• Section - 2 Vacant

• Section - 3 Service Charges

• Section - 4 Exchange Access Services

• Section - 5 Centrex Services

• Section - 6 Central Office Services

• Section - 7 Central Office Optional Features

• Section - 8 Miscellaneous Services

• Section - 9 Vacant

• Section - 10 Wide Area Telecommunications Services (WATS)

• Section - 11 Operator Services

• Section - 12 Vacant

• Section - 13 Vacant

• Section - 14 Vacant

• Section - 15 Dedicated Communications Services

• Section - 16 Special Billing Arrangements

• Section - 17 ISDN Services

• Section - 18 Video Services

• Section - 19 Vacant

• Section - 20 Vacant

• Section - 21 Vacant

• Section - 22 Vacant

• Section - 23 Vacant