S2M - Anschlußbelegung

   

            Anschlußbelegung E1-Modul

 

PIN RJ45

PIN DB-15

Funktion

Normal marking on NT

1

8

Receive, NT to TE (+)

S2Mab/a

2

15

Receive, NT to TE (-)

S2Mab/b

4

9

Transmit, TE to NT (+)

S2Man/a

5

2

Transmit, TE to NT (-)

S2Man/b

3,6-8

 

Not used

 

Special Note for NTs in Germany 

In Germany, the send lines (NT->TE) on the connector block are often marked with S2Mab (a and b), and the receive lines (TE->NT) with  S2Man (a and b). On the NT itself, there are usually several LEDs pro-vided for displaying various status conditions. The fol-lowing indicators and their meanings seem to be some-what standardized. In doubt, please refer to the operators manual for your NT.

 

LED1       Color: green

Marked: “NT”

Meaning: LED-on normally means that the

proper voltage is being supplied.

 

LED2       Color: red

Marked: “UK2”

Meaning: LED-on (or blinking) normally means

that the S 2M interface has not been activated at

the switching station. In such cases, you will

have to contact you local telephone company to

have the interface activated.

 

LED3       Color: red

Marked: “S2M”

Meaning: LED-on normally means that signals

are not being received from the end device.