Gateway Model Document 1102 Installation Manual 1104 User Manual , Reference Manual , Configuration Notes 1124 Installation 1204 Configuration Notes 2102 Specifications 3000 Series Specifications 3300 Specifications 3400 Specifications 3500 Series Specifications 3530 Specifications 3531 Specifications 3532 Specifications 3600 Series Specifications 3621 Hardware Installation Manual 3630 Specifications 3631 Hardware Installation Manual , Specifications 3632 Hardware Installation Manual , Specifications 3632 (E1 PRI) Hardware Installation Manual 4400 SERIES Specifications , Application Note 4401 Application Note 4402 Application Note 4404 Application Note