Page 598 of 894 NT8D14 Universal Trunk card
553-3001-211 Standard 2.00 September 2004
Power requirements
Power to the NT8D14 Universal Trunk card is provided by the module power
supply (ac or dc).
Ring detection 17 to 33 Hz
40 to 120 V rms
N/A N/A N/A
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 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.
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
Table 180
Universal trunk card – trunk interface electrical characteristics (Part 2 of 2)
Trunk Types
Characteristic CO / FX / WATS DID / TIE RAN Paging