Nortel Networks 1000 - Manual (Page 536)

536 NT8D14 Universal Trunk card
Figure 158
DID trunk, loop DR call connection sequence - incoming call from CO
The trunk is arranged for first party release. The CO releases the trunk
by removing the low resistance loop and normal battery and ground are
restored at the system.
Nortel Communication Server 1000
Circuit Card Reference
NN43001-311 02.06 Standard
27 August 2008
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