Power Requirements - Nortel Enterprise 1000 Reference Manual

Page 84 of 236 Analog Trunk Cards - NT8D14 Universal Trunk Card
Table 7
Universal trunk card – trunk interface electrical characteristics (Part 2 of 2)
Characteristic
Minimum detected loop
current
Ground potential difference ±3 V
Low DC loop resistance
during outpulsing
High DC loop resistance
Ring detection
Line leakage
AC induction rejection
Note 1: Selected in software.
Note 2: Selected by jumper strap settings on card. Refer to Tables 11, 12, and 13 for details.
Note 3: Loop start answer supervision introduced with vintage BA cards and release 19 software.
Note 4: 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

553-3023-211 Standard 1.00 June 2001
CO/FX/WATS
trunks
20 mA
<300 ohms
Ground start
Š 30k ohms;
loop start
Š 5M ohms
17 to 33 Hz
40 to 120 V rms
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 universal trunk card is provided by the module power supply
(ac or dc). Table 8 lists the power requirements for the universal trunk card.
Table 8
Power requirements (Part 1 of 2)
Voltage
+15.0 V dc
–15.0 V dc
+5.0 V dc
DID or tie
trunks
10 mA
N/A
N/A
N/A
Tolerance
+5%
+5%
+5%
RAN Paging
trunks trunks
10 mA N/A
±1 V ±1 V
N/A N/A
N/A N/A
N/A N/A
N/A N/A
N/A N/A
Current (max.)
306 mA
306 mA
750 mA