Report copyright - AN549: The HC-5502X/4X Telephone Subscriber … HC-5502X/4X Telephone Subscriber Line AN549 Rev 1.00 Page 3 of 18 January 1997 VB2 VB1 VB2 VB3 VB4 VB5 +5V IB1IB2IB3 IB4 IB5 IB6 IB7
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