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Physical Description 
 
 
 
 
 
 
 
Protective earthing screw (mandatory for all installations). Accepts a 6-32 UNC screw. 
 
100-240V 
50 – 60Hz 1.0A 
 
(DC) 
48V = 1.3A 
AC power plug entry or DC inlet for terminal block (depending on ordered model). 
Ready LED (located on front panel): 
Power received by device and normal operation 
Loading software or initialization 
LINES 1-24 
50-pin Telco connector providing up to 24 Foreign eXchange Subscriber (FXS) lines.  
Channels 1-24 LED (located on front panel): 
Phone in off-hook position or ringing 
  SRTP is enabled and device resources (DSPs) are currently 
unavailable for calls on these ports (their resources are 
"borrowed" for SRTP functionality). This LED state applies to 
Phone in on-hook position or not connected 
 
Control LED (located on front panel): 
Sending and receiving signaling (SIP) messages 
 
Data LED (located on front panel): 
RS-232 serial interface port (RJ-45). 
 
10/100Base-T Ethernet port (RJ-45) for connecting to the IP network. 
LAN LED (located on front panel): 
Ethernet link established