2N NetStar Hardware manual - Manual (Page 26)

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1.
2.
TE port set–up
For TE port the pins 1–2, 3–4, 5–6, 7–8 should be connected
1 to 4 x PRI port
Interface type – S0 without power supply / NT–TE
Protocol – DSS1 – EURO ISDN
Connection – RJ45 with LED control lamp
TE modus
Pin1, Pin2 = reception couple
Pin4, Pin5 = broadcasting couple
NT modus
Pin1, Pin2 = broadcasting couple
Pin4, Pin5 = reception couple