Nortel Networks Passport 4400 - Manual (Page 79)

8-1
Analog Voice Modules
8
Analog voice modules provide support for Foreign Exchange Station (FXS),
Foreign Exchange Office (FXO), and Ear and Mouth (E&M) analog voice services.
The following voice modules are available:
• the Universal Analog Voice Module (UAVM) and its three interface
modules (for FXS, FXO, and E&M)
• the single and dual channel Analog Voice Module (AVM).
Universal Analog Voice Module (UAVM)
The Universal Analog Voice Module (UAVM) converts analog voice obtained from
a telephone interface into digital form. The digitized signal is transmitted over a
data link and routed to a compatible voice/fax channel specified by the destination
address. The UAVM consists of a motherboard and one or two interface modules
(see Figure 8-3, “Universal Analog Voice Module with Two Interface Modules
Installed”).
Figure 8-1. Front View and Indicators for Universal Analog Voice Module
OK LO RO LS RS TM OK LO RO LS RS TM
Dual Interface Module
OK LO RO LS RS TM
Single Interface Module