Nortel Circuit Card Installation Manual page 610

Page 610 of 906
Table 185
Universal trunk card – trunk interface electrical characteristics (Part 2 of 2)
Characteristic
Line leakage
AC induction
rejection
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.
Power requirements
553-3001-211 Standard 3.00
NT8D14 Universal Trunk card
CO / FX / WATS
Š 30k ohms,
tip-to-ring,
tip-to-ground,
ring-to-ground
10 V rms, tip-to-ring,
tip-to-ground,
ring-to-ground
Power to the NT8D14 Universal Trunk card is provided by the module power
supply (ac or dc).
Table 186
Power requirements for universal trunk card
Voltage
+15.0 V dc
–15.0 V dc
+5.0 V dc
+8.5 V dc
–48.0 V dc
August 2005
Trunk Types
DID / TIE
Š 30k ohms,
tip-to-ring,
tip-to-ground,
ring-to-ground
10 V rms, tip-to-ring,
tip-to-ground,
ring-to-ground
Tolerance
+5%
+5%
+5%
+2%
+5%
RAN
N/A
N/A
Current (max.)
306 mA
306 mA
750 mA
450 mA
415 mA
Paging
N/A
N/A