Nortel Networks 553-3001-211 manual 598 of 894 NT8D14 Universal Trunk card

Page 598 of 894 NT8D14 Universal Trunk card

Table 180

Universal trunk card – trunk interface electrical characteristics (Part 2 of 2)

		Trunk Types
Characteristic	CO / FX / WATS	DID / TIE	RAN	Paging
Ring detection	17 to 33 Hz	N/A	N/A	N/A
	40 to 120 V rms
Line leakage	Š 30k ohms,	Š 30k ohms,	N/A	N/A
	tip-to-ring,	tip-to-ring,
	tip-to-ground,
		tip-to-ground,
	ring-to-ground
		ring-to-ground
AC induction	10 V rms, tip-to-ring,	10 V rms, tip-to-ring,	N/A	N/A
rejection	tip-to-ground,	tip-to-ground,
	ring-to-ground
		ring-to-ground
Selected in software.

Selected by jumper strap settings on card. Refer to Tables 185, 186, and 187 for details.

For loop extender application, the maximum voltage applied between tip and ring is –105 V ±5%. The minimum dc loop resistance for this type of application is 1800 ohms.

Power requirements

Power to the NT8D14 Universal Trunk card is provided by the module power supply (ac or dc).

Table 181

Power requirements for universal trunk card

Voltage	Tolerance	Current (max.)
+15.0 V dc	+5%	306 mA
–15.0 V dc	+5%	306 mA
+5.0 V dc	+5%	750 mA
+8.5 V dc	+2%	450 mA
–48.0 V dc	+5%	415 mA

553-3001-211 Standard 2.00 September 2004