226 CHAPTER 4: FLEXIBLE INTERFACE CARDS
DFIC-24FXO24FXS
Introduction The DFIC-24FXO24FXS provides 24-port voice subscriber circuit and 24-port voice
AT0 analog trunk circuit. FXS interfaces process and transmit voice signals over
data communications networks for 24 regular analog phones, faxes, or AT0 loop
trunks of telephone exchanges. The FXO interfaces process and transmit voice
signals over data communications networks for 24 loops of telephone exchanges.
Interface Attributes
Interface LEDs DFIC-24FXO24FXS has two kinds of LEDs, Active and Link.
The following figure illustrates the DFIC-24FXO24FXS panel.
Figure 278 DFIC-24FXO24FXS front panel
Interface Cable DFIC-24FXO24FXS uses a 5 m (16.4 ft.) or 15 m (49.2 ft.) telephone conversion
cable. At one end of the cable is a D50 male connector that is used to connect to
the DFIC-24FXO24FXS card; at the other end are 24 RJ11 connectors.
Table 169 Interface attributes of the DFIC-24FXO24FXS module
Attribute Description
Connector 50-pin D-type female connector
Interface standard FXS and FXO interface
Interface rate 24 × FXO interface rate plus 24 × FXS
interface rate
Table 170 Description of LEDs on the DFIC-24FXO24FXS panel
LED FXO interface FXS interface
Active OFF means all links are idle.
Blinking means one or more
links are occupied.
OFF means all links are idle.
Blinking means one or more
links are occupied.
Link Steady ON if an electric device
is connected.
Steady ON means no fault
occurs on the link