Nortel Networks Circuit Card - Manual (Page 610)

Page 610 of 906 NT8D14 Universal Trunk card
553-3001-211 Standard 3.00 August 2005
Power requirements
Power to the NT8D14 Universal Trunk card is provided by the module power
supply (ac or dc).
Line leakage Š 30k ohms,
tip-to-ring,
tip-to-ground,
ring-to-ground Š 30k ohms,
tip-to-ring,
tip-to-ground,
ring-to-ground N/A N/A
AC induction
rejection 10 V rms, tip-to-ring,
tip-to-ground,
ring-to-ground 10 V rms, tip-to-ring,
tip-to-ground,
ring-to-ground N/A N/A
Selected in software.
Selected by jumper strap settings on card. Refer to Tables 190, 191, and 192 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.
Table 186
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
Table 185
Universal trunk card – trunk interface electrical characteristics (Part 2 of 2)
Trunk Types
Characteristic CO / FX / WATS DID / TIE RAN Paging