22
Interface LEDs
Figure 25 SIC-1FXS panel
Figure 26 SIC-1FXO panel
Figure 27 SIC-2FXS panel
Figure 28 SIC-2FXO panel
Table 38 LED description
LINK
• Off means the link is idle.
• On means the link is being occupied for call connection.
ACT
• Off means the link is idle.
• On 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."
SIC-2FXS1FXO
Introduction
The 2-port analog subscriber circuit interface module and 1-port voice AT0 loop trunk interface
module (SIC-2FXS1FXO) provide access for and handle three channels of analog voice signals over
data communication networks. Two FXS interfaces and one FXO interface are available on a
SIC-2FXS1FXO module:
• 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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