Both the AVM and UAVM are available in single and dual-channel models. The dual-channel model of either unit has two sets of indicators at the front, while the single-channel model has only one set. Telephone connections to either AVM or UAVM are made from the rear. Details on the telephone interface connectors are provided in the appropriate Hardware Installation Manual shown below:
The FXS Voice Module is available in dual and quad-channel models. The dual-channel model has two sets of indicators at the front, while the quad-channel model has four sets. Details on the telephone interface connectors are provided in the Hardware Installation Manual shown below:
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Passport 4430/50/55