6 Summary
Power requirements
-

NT8D03AB

The
NlSDO3AB
Analog Line Card has the following power requirements:
1
Voltage Tolerance Idle
Active
-
Max
(+/-I
Current Current
+
150Vdc
0.50 V dc 48 ma Oma 48 ma
+ 8.5 Vdc
l.OOVdc
150 ma 8ma 280 ma
-
48.0 V dc 2.40 V dc 48 ma 40 ma 688 ma
-
48.0 V dc 2.40 V dc Oma
(1)lOma
320ma
86.0 V ac 5.00 V ac Oma (2) 10 ma 160 ma
-150.0 V dc 5.00 V dc 0 ma 2ma 32 ma
Note:
(1) Each active ringing relay requires 10 ma of battery voltage.
(2)
Reflects the current for ringing a single station set. There
may be as many as five ringers on each line.
Foreign and surge voltage protections.-
When telephone lines connected to the line circuit are exposed to foreign
voltages by direct contact or induction (for example, power line crosses or
lightning), protection devices must be installed on the customer’s premises.
These devices must be capable of providing a path to ground from tip and
ring for foreign voltages that exceed 600 V peak.
Overload level
Signal levels exceeding + 7 dRm applied to the tip and ring cause distortion
in speech transmission.
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Analog line card description 553-3001-l 61
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