Label  Color  State  Function 
Channels 
Green  On  Telephone in off-hook position or ringing. 
Red  On  Line malfunction. 
-  Off  Normal. 
 
 
3.1.2  MP-124 Rear Panel 
The rear panel of the MP-124 provides the port interfaces. The  MP-124 is available as 
either an AC-powered or DC-powered device.  
  DC-powered model: 
Figure  3-3: Rear Panel of MP-124 DC Powered Model 
 
The table below describes the MP-124 rear panel components. 
Table  3-2: MP-124 Rear-Panel Description 
Item #  Label  Component Description 
1   
Protective earthing screw (mandatory for all 
installations). Accepts a 6-32 UNC screw. 
2 
100-250 V~50 - 60Hz 
2A 
AC power supply socket. 
Note: Applicable only to the AC-powered model. 
48V 1.3A 
DC inlet for a DC terminal block. 
Note: Applicable only to the DC-powered model. 
3 
ANALOG FXS 
LINES 1–24 
50-pin Telco connector for 1-24 analog lines. 
4 
RS-232 
9-pin RS-232 port. 
5 
ETHERNET 
10/100Base-TX Ethernet RJ-45 port.