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8400B Plus Data Module
7500B Data Module
The 7500B Data Module is a terminal adapter primarily intended for connecting data terminal
equipment (DTE) or data communications equipment (DCE) to the ISDN network.  It can be con-
figured in a number of ways to allow the attached DTE and DCE to send and receive data
through the digital network.  The 7500B has no voice functions.
Applications
The 7500B Data Module can be used with the DEFINITY G2 through a 4-wire‘‘T’’-interface.  It is
used by the customer who wants to connect his DCE and DTE with DTE, DCE, or host processor
at another location using an ISDN network.  The 7500B data module cannot be used in a modem
pooling or Host Access arrangement on DEFINITY G2.
Physical Description
Dimensions
Note:
The following dimensions are approximate.
Width = 7 inches
Depth (front and rear) = 8-3/4 inches
Height = 1-3/4 inches
Lights
POWER/TEST Light
This red light goes on when the 7500B data module is on and flashes during all tests.
DATA Light
This green light goes on when a data call is in progress.  It flashes during self-test and when
receiving an incoming data call that has not been answered.
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