Filter
Top Products
5-1
T1, E1, and Digital Voice Modules
5
This chapter describes the hardware features and physical descriptions of the
voice modules (digital) that provide the Passport 4400 unit (4430/4450/4455)
with T1 or E1 connectivity and digital/analog voice options. Included are the
following modules:
• T1 Voice Module on page 5-2
— The Single Port T1 Voice Module (TVM/1 - NTAU99AA) provides
connection to a single T1 line DS-1).
— The Dual Port T1 Voice Module (TVM/2 - NTAY14AA) provides
connections to two T1 lines (DSX-1 and DS-1).
• E1 Voice Module on page 5-4
— The Single Port E1 Voice Module (EVM/1 - NTAY15AA) provides
connections to a single E1 line (L1).
— The Dual Port E1 Voice Module (EVM/2 - NTAY16AA) provides
connections to two E1 lines (L1 and L2).
• Digital Voice Expansion Module on page 5-10 (NTAY18AA), is an
expansion module that contains slots to support additional Digital Voice
Modules. To support a full T1 or E1 link, two Digital Voice Expansion
Modules in addition to the T1 Voice Module or E1 Voice Module are
required.
• DVEM Power Harness on page 5-11 (NTAU32AA), provides additional
power to the Digital Voice Expansion Module.
• Digital Voice Module on page 5-12 (NTAU60AA), is a SIMM card
(daughterboard) that is installed directly onto the T1 Voice Module, the
E1 Voice Module, or the Digital Voice Expansion Module. Each Digital
Voice Module supports one digital voice channel.
• Removing and Installing Daughterboards is discussed on page 5-13
• ISDN BRI Voice Module on page 5-14 ( IVM-BRI/ST/2- NTAU76CA), is
an expansion module providing the Passport 4400 unit with an ISDN
interface for connection to an ISDN PBX, ISDN phone, or other ISDN
protocol.
Refer to the following chapters for added information:
• Chapter 8, Indicators
• Chapter 11, Connecting a Workstation
• Appendix A, Cable Diagrams
• Appendix B, Agency and Telephone Company Requirements.
• Appendix D, T1 Voice Module Cabling Requirements.