T1/E1 And Digital Voice Modules; T1 Voice Module (Tvm) - Nortel Passport 4400 Series Introduction Manual

Optional Modules

T1/E1 and Digital Voice Modules

T1/E1 digital voice and data is supported on the Passport 4400 through the use
of the modules and components described below:
• T1 Voice Module (TVM) - provides a T1 interface to a PBX. Up to six
• E1 Voice Module (EVM)- provides an E1 interface to a PBX. Up to six
• Digital Voice Expansion Module (DVEM) - provides slots to support
• Digital Voice Module (DVM) - is a SIMM module that is plugged directly

T1 Voice Module (TVM)

The T1 Voice Module provides a user interface to one or two 1.544 Mbps T1 lines.
It can support a maximum of 24 Digital Voice Modules (six on the module, the
rest on the Digital Voice Expansion Modules).
Universal Analog Voice Module with Interface Modules
Digital Voice Modules plug into this module.
Digital Voice Modules plug into this module.
additional DVMs.
into the TVM, EVM or DVEM.
Passport 4400 Introduction and Road Map
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