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ManualsBrandsCarrier Access ManualsUniversal RemoteAB II
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Chapter 5 12-Channel FXO & Dial Pulse Termination
5-1
12 CHANNEL FXO & DIAL PULSE
TERMINATION CARD
DESCRIPTION
The FXO/DPT 12-channel analog card is an “office end” telephone line voice card designed specifically as an
interface for Carrier Access Corporation’s family of Access Bank
T1 Voice and Data Multiplexers, which are
FCC-approved digital Channel Banks and Channel Service Unit/ Data Service Units (CSU /DSUs) for
attachment of customer premise telecommunications equipment to public network T1 (DS1) services. The
FXO/DPT card provides an interface between the Tip/Ring pair and T1 line for each of the channels on the
FXO/DPT to provide Foreign Exchange Office (FXO) and Dial Pulse Termination (DPT) functionality. It is
similar in appearance and complementary in functionality to CAC’s FXS 12-channel analog card. The “rear”
end of the FXO/DPT card (opposite the connector to the LIU board in the front of the Access Bank) has 12-
channel status LEDs and one 4-pin DIP switch used to select whether the card utilizes FXO or DPT termination.
Also on the card, each individual channel has a two position switch for the selection of ground start or loop start
and a 6-pin DIP switch to control the line attenuation.
TERMINATION OPTIONS
The FXO/DPT card can be configured for use as either an FXO or DPT interface card. Further, FXO offers both
ground start (GS) and loop start (LS) modes of operation. These options require the setting of one switch per
channel (12 per card) and one 4-position Dual Inline Package (DIP) switch per card—see Table 6-1 below. Note
that in the table, a “1” denotes the switch is on, while a “0 indicates the switch is off. The slide switch on the 12-
channel analog card for each channel indicates whether that channel is set to GS or LS mode. The DIP switch
determines whether the card will use FXO or DPT termination. It is important to note that when DPT is selected,
the mechanical slide switches must all be set to LS. However, when FXO termination is chosen, LS or GS can be
selected on a per-channel basis.