Nortel Networks Circuit Card 311 - Manual (Page 752)

752 NT8D15 E and M Trunk card
Figure 242
Signaling orientation for tandem connection between E and M and CO trunks
Outgoing calls are processed as follows:
• The M lead changes from ground to battery.
— If answer supervision is provided by the far end, there is a change
from open to ground on the E lead (ground detection).
Nortel Communication Server 1000
Circuit Card Reference
NN43001-311 01.04 Standard
Release 5.0 23 May 2008
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