Apparatus and method for testing subscriber line

Details Apparatus and method for testing subscriber line Apparatus and method for testing subscriber line

H - Electricity

04

M

H04M 3/30 (2006.01) H04M 3/00 (2006.01)

Patent

CA 2278378

There are provided two line monitoring resistors 63a, 63b of high resistance (Rt1, Rt2) branched at nodes 64a, 64b from subscriber line (LN) 3 in line circuit (LC) 4 and connected between each node and earth, and arithmetic operation unit (EP) 60 into which terminal voltages Vt1, Vt2 of line monitoring resistors 63a, 63b are inputted. Arithmetic operation unit 60 monitors Vt1, Vt2 for a predetermined time when subscriber terminal 2 is in on-hook, and hence detects unbalance of DC voltage of both lines and voltage induced on subscriber line 3 to estimate line resistance. When the subscriber terminal is off-hook, line resistance of the line is estimated using a difference between a theoretical value of Vt1, Vt2 when the line is open and silent and a corrected value in a silent state when the sound component is removed.

Affiliated with

Also associated with

Rating

Apparatus and method for testing subscriber line does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Apparatus and method for testing subscriber line, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Apparatus and method for testing subscriber line will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFCA-PAI-O-1825140