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6-1
Analog Voice Modules
6
Analog Voice Modules convert analog voice obtained from telephone interfaces
into digital form, and internally connect the converted voice to the Ethernet
Base Module within the unit.
The following voice modules are discussed in this chapter:
• Analog Voice Module on page 6-3. FXS, FXO, and E&M interfaces are
determined by changing the straps on the front of the module’s circuit
board.
— Single Channel (AVM/1 - NTAU61AA)
— Dual Channel (AVM/2 - NTAU62AA)
• Universal Analog Voice Module on page 6-6 (UAVM/2 - NTAU50AA)
offers the following signaling formats:
— FXS and FXO Interface Modules on page 6-11 (VIM/FXS -
NTAY09AA and VIM/FXO-E - NTLN23AA)
— E&M Interface Module on page 6-17 (VIM/E&M - NTAY09AA)
— Voice/Fax Switch Module on page 6-19
Single and Dual Channel Models
Both the Analog Voice Module and Universal Analog Voice Module are available
in single- and dual-channel models.
Figure 6-1. Front View and Indicators for Analog Voice Module and
Universal Analog Voice Module
Caution:
!
The interface module must not be inserted into, or removed from
the unit, while the unit is operating. This could cause damage to
the unit or cause interruption of network services or both.
OK LO RO LS RS TM OK LO RO LS RS TM
Dual Channel
OK LO RO LS RS TM
Single Channel