DigiTech C0408 system manual Section ADD-ON Expansion Modules Introduction, IMI Instalk

IMI 66-083 Instalk:

SECTION 3

ADD-ON EXPANSION MODULES

INTRODUCTION

One or two optional add-on expansion modules can be installed on the common equipment base unit to increase the line and station capacity of an installed system. The add-on module is as follows:

•408 Expansion Module - A four-line by eight-station expansion unit

The expansion capabilities provided by the add-on module are shown in Figure 3-14on the next page.

The default numbering of the expanded lines and stations begin with the next higher line or station port number from that provided by the host base unit. The numbering continues sequentially from top module to bottom module if two modules are installed. For example: The defaulted 8-line, 16-station base unit

provides station ports 10 through 25 and lines 1 through 8. When installed, a 408 Expansion module will provide station ports 26 through 33 and lines 9 through 12 thus creating a twelve line by twenty-four station system.

Each expansion module provides a tip and ring pair as an emergency power failure circuit. This circuit is connected to the first module-provided line.

The line connections of the expansion module are available at two modular jacks. When facing the jack openings, lines 1 and 2 are provided by the jack on the right and lines 3 and 4 are provided by the jack on the left. Line connections are detailed in Table 3-5, below.

The station connections are available at a 50-pin connector. Table 3-6 detail these station connections.

Table 3-5. Line Connections - 408 Expansion Module

1 6 1 No Connection I I

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