2N Omega Lite - Installation Manual v1.9 - Manual (Page 27)

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J1 - connector for connecting to motherboard (or extender module)
(connector is secured against incorrect connection by the blanking off
of PIN 5,6,7,8).
J2 - connector for connecting ISDN line from equipment ISDN NT (end
point).
J3 - connector ISDN BUS.
J4-J5 - jumpers terminating ISDN line using terminating resistances of
100
Ω (connected – used for termination of ISDN lines under the
assumption that this ISDN line will end in this point (for example,
always for type PTP)) !!! NOTE
– under the assumption that the
terminating resistances are not already ISDN socket!!!
J6 - . company servicing reanimation connector.
J7 - . company servicing reanimation connector.
J8 - company servicing reanimation connector (SW for CPU).
J9 - company servicing reanimation connector (SW for ALTERA).
D1
- signalling LED (synchronisation of layer 1).
D2 - signalling LED (synchronisation of layer 2).
D3 - signalling LED (occupying of channel B1).
D4 - signalling LED (occupying of channel B2).
D5
- signalling LED (power of module on).