Selex ES SPA F567DHDE-HP Benutzerhandbuch

 

SELEX Communications 

 

 

4W cabling example: link between RBS A and RBS B 

M (+) 

1 

Not connected 

Not connected 

1 

M (+) 

M (-) 

2 

Not connected 

Not connected 

2 

M (-) 

E (+) 

3 

Not connected 

Not connected 

3 

E (+) 

AF_OUT (-) 

4 

White-blue 

White-orange 4 

AF_OUT 

(-) 

AF_OUT (+) 

5 

Blue 

Orange 

5 

AF_OUT (+) 

E (-) 

6 

Not connected 

Not connected 

6 

E (-) 

AF_IN (-) 

7 

White-orange 

White-blue 7 

AF_IN 

(-) 

AF_IN (+) 

8 

Orange 

 

Blue 8 

AF_IN 

(+) 

 

All the E/M signals share a common voltage reference. The four Mouth signals may be hardware 

configured independently. The four Ear signals share the same hardware configuration in couple of 

lines. For unbalanced settings connect the two communicating entities to the same ground. 

 

E/M Type I is the original E/M lead signaling arrangement and it is the most common interface type in 

North America. The following diagram displays the sent signal states for active/not active signaling. 

The RBS grounds its M−lead to signal a seizure. The other device applies battery to its M−lead to 

signal a seizure. Prod-El SRB expects to see active conditions on the E−lead and signal active to the 

remote device on M−lead. 

 

 

E/M Type II provides a four−wire fully−looped arrangement that provides full isolation between the 

trunks and signaling units. The following table displays the sent signal states for active/not active 

signaling. The RBS grounds its M−lead to signal a seizure. The other device applies battery to its 

M−lead to signal a seizure. Prod-El SRB expects to see active conditions on the E−lead and signal 

active to the remote device on M−lead. 

SRB side