Nortel Networks 1000 - Manual (Page 531)

Operation 531
Figure 154
Loop start call connection sequence
Direct inward dial operation
Incoming calls
An incoming call from the CO places a low-resistance loop across the
tip and ring leads. See
Figure 155 "DID trunk, loop DR call states -
incoming call from CO" (page 533) and Figure 156 "DID trunk, loop DR call
connection sequence - incoming call from CO" (page 534) .
Nortel Communication Server 1000
Circuit Card Reference
NN43001-311 02.06 Standard
27 August 2008
Copyright © 2003-2008 Nortel Networks
.