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Interface specifications
Table 39 Interface specifications
Connector type RJ-11
Number of connectors
2 FXS interfaces
1 FXO interface
Interface standard
• Supports subscriber circuit interface (FXS), compliant with ITU Q.512
• Supports loop trunk interface (FXO), compliant with ITU Q.552
• Over-current and over-voltage protection compliant with ITU K.20
Cable type Telephone cable with ferrite core
Dial-up mode Supports DTMF, compliant with GB3378, but does not support pulse dial-up.
Bandwidth 300 Hz to 3400 Hz
Interface LEDs
Figure 29 SIC-2FXS1FXO panel
Table 40 LED description
LINK/ACT
• Off means the link is idle.
• On (Green) means the link is being occupied for call connection.
• Flashing (Yellow) means the link is being occupied for communication.
Interface cables and connection methods
For more information about FXS/FXO interface cables and connection methods, see
"ADSL/BS/FXS/FXO/AM/FCM interface."
DSIC-4FXS1FXO
Introduction
The 4-port analog subscriber circuit interface module and 1-port voice AT0 loop trunk interface
module (DSIC-4FXS1FXO) provide access for and handle five channels of analog voice signals over
data communication networks.
• FXS interfaces are analog subscriber line interfaces that provide ordinary analog telephone and
fax access and also can connect AT0 loop trunks of exchanges;
• FXO interfaces are loop trunk interfaces that provide access for common subscriber lines.
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