公开(公告)号：US3752940A

公开(公告)日：1973-08-14

申请号：US3752940D

申请日：1972-07-10

Applicant: PORTA SYSTEMS CORP

Inventor： SANTULLI V ,  ROUMANOS W ,  MANOS G ,  GAZZO J

IPC: H04M3/26 ,  H04M3/00 ,  H04M3/30 ,  H04Q3/545

CPC classification number: H04M3/30

Abstract: Card programable line verification tester apparatus iteratively and automatically establishes connections via old and replacement (e.g., ESS) switching apparatus to subscriber loop appearances on a main distributing frame. The assumed continuous tip and ring conduction paths are then tested for faults such as spurious battery, or short, open, high impedance or crossed connections.

Abstract translation: 卡可编程线路验证测试仪器通过旧的和替换（例如，ESS）交换设备自动建立到主分配帧上的用户环路外观的连接。 然后测试假设的连续尖端和环形导电路径，以防止诸如伪电池或短路，开路，高阻抗或交叉连接之类的故障。