ETS SMA1-LPEA-C5, Instructions

SMA1-LPEA-C5 Interface Instructions

 
The SMA1-LPEA-C5 is a single channel, two way audio Interface box designed to be used with ETS speaker / 
microphones and Power Over Ethernet I/P cameras. It contains a 2.5Watt speaker power amplifier to drive a 70v speaker 
and and an ETS microphone interface. The SMA1-LPEA-C5 also features installer friendly termination of the cable runs 
and a standard RCA or 3.5mm audio output connectors. The SMA1-LPEA-C5 can be connected to a “microphone” or 
“line” level input, and “line level” output  of a POE I/P camera. 
 
 

SMA1-LPEA-C5 location and power 

The SMA1-LPEA-C5 interface box is designed to be located any place along the I/P camera CAT5 cable run. It must be 
located in between the I/P camera and the router or switcher as shown in figure 1. 
NOTES-  

1.  The I/P camera MUST be connected and operating before the SMA1-LPEA-C5’s power indicator will illuminate. 
2.    The SMA1-LPEA-C5 will not work with standard I/P cameras.  

CAT5 Speaker / Microphone Cable Run 

Run a standard CAT5 cable to the ETS Speaker / microphone (up to 1000’ maximum) and make terminations on BOTH 
ends as follows on the RJ45 jack: 
 
Pair 1   

1  

CALL SW 

2  

CALL SW 

Pair 2   

3  

SPEAKER (70V) + 

4  

SPEAKER (70V) – 

Pair 3   

5  

MICR 

6  

MICROPHONE – 

Pair 4   

7  

+12V (MICROPHONE) 

8  

COM (MICROPHONE) 

 
Adjusting the microphone “gain” and SMA1-LPEA-C5 “level” controls (audio output) 

If the SMA1-LPEA-C5 will be plugged into a “microphone level” input of an I/P camera, set the microphone gain slightly 
clockwise (or 1/8 of a full turn) from full counter-clockwise. Then use the “level control” on the SMA1-LPEA-C5 to set a 
volume that produces an acceptable audio level at the head end. 
If the will SMA1-LPEA-C5 be used with a “line level” input, turn the gain control of the SM1 to 3/4 full clockwise and adjust 
the level control on the SMA1-LPEA-C5 to produce the clearest audio level at the head end. 
 

Adjusting the speaker volume 

Adjust the audio input level for an acceptable volume level on the connected 70v speaker / microphone. 
 
 

SMA1-LPEA-C5 Mode switch:

 The SMA1-LPEA-C5 supports Both Modes A and B of IEEE802.3af  POE. The SMA1-

LPEA-C5 is pre-configured for the most common use of the “end point” POE IEEE802.3af standard (mode A). If the power 
LED does not illuminate in this position, try the mode B position (mid span).