Isdn callback device for testing telephone line
Номер патента: CA2238638A1
Опубликовано: 30-11-1998
Автор(ы): Alan B. Lowell, James D. Coleman, James W. Lester, Roy L. Soto
Принадлежит: Alan B. Lowell, James D. Coleman, James W. Lester, Roy L. Soto
Опубликовано: 30-11-1998
Автор(ы): Alan B. Lowell, James D. Coleman, James W. Lester, Roy L. Soto
Принадлежит: Alan B. Lowell, James D. Coleman, James W. Lester, Roy L. Soto
Реферат: An ISDN callback device installable in a telephone network facility, and configured to pre-qualify and test ISDN telephone circuits, that either relatively upstream of the ISDN callback device (toward a central office line card), or relatively downstream of the ISDN callback device (toward a network termination, such as a craftsperson's test set or customer premises equipment). The ISDN callback device contains two, individually controllable communication/test interface, one of which is operative to emulate a subscriber premises ISDN terminal device, in a network termination (NT1-TE) mode of operation, and the other of which is controllably operative as either a network termination (NT1-TE) mode circuit, or a line termination (LT) mode circuit.
Test system for assessing dsl capability of telephone lines
Номер патента: WO2006039379A1. Автор: Muhammad A. Afzal,Frank R. Bauer,Joseph S. Rosen,Roderick Warner. Владелец: Teradyne, Inc.. Дата публикации: 2006-04-13.