Nortel Networks 553-3001-211 manual Lists the power requirements for the E&M trunk card

NT8D15 E&M Trunk card Page 641 of 894

Table 198

Electrical characteristics of trunk cards (Part 2 of 2)

Characteristic	DID Trunk	CO trunk
Signaling type	Loop	Ground or loop start
Far-end battery	-42 to -52.5 V	-42 to -52.5 V
Near-end battery	N/A	-42.75 to -52.5 V
Minimum loop current	N/A	20 mA
Ground potential difference	+ 10 V	+ 3 V
Low DC loop resistance	N/A	300 ohms
during outpulsing
High DC loop resistance	N/A	Ground start equal to or
		greater than 30 kS. Loop start
		equal to or greater than 5 MS

Line leakage	Equal to or greater than 30
	kS (Tip to Ring, Tip to GND,
	Ring to GND).
Effective loss	See pad table

Equal to or greater than 30 kS (Tip to Ring, Tip to GND, Ring to GND)

See pad table

Power requirements

Table 199 lists the power requirements for the E&M trunk card.

Table 199

Power requirements

Voltage	Tolerance	Max current
+15.0 V dc	±5%	200 mA
–15.0 V dc	±5%	200 mA
+8.5 V dc	±2%	200 mA
–48.0 V dc	±5 %	415 mA

Circuit Card Description and Installation