|
US4300023A
(en)
|
|
Hybrid circuit
|
|
FR2848721A1
(fr)
|
|
Transformateur a changement de mode selectif en frequences
|
|
US5274704A
(en)
|
|
Transformer telephone line interface circuit
|
|
KR100821422B1
(ko)
|
|
평형 전송 종단 장치 및 그것을 이용한 수신 장치
|
|
BE437316A
(cg-RX-API-DMAC7.html)
|
|
|
|
US4110636A
(en)
|
|
Feeding bridge
|
|
US5038375A
(en)
|
|
Circuit arrangement for preventing gain from responding to frequency variation despite the presence of an isolation transformer
|
|
CA1157978A
(en)
|
|
Loop sensing circuit for use with a subscriber loop interface circuit
|
|
US2286069A
(en)
|
|
Telephone set circuit
|
|
JPS6042946A
(ja)
|
|
適応線路ハイブリツド回路
|
|
US2775649A
(en)
|
|
Telephone subscriber sets
|
|
CH290147A
(fr)
|
|
Poste téléphonique d'abonné.
|
|
FR2657736A1
(fr)
|
|
Circuit a resistance variable commandee en tension.
|
|
US1654633A
(en)
|
|
Recording system
|
|
JP2002335193A
(ja)
|
|
２線４線変換回路
|
|
JPH03289221A
(ja)
|
|
擬似通信回路網
|
|
US2318681A
(en)
|
|
Telephone set
|
|
US4899379A
(en)
|
|
Circuit arrangement for the connection of line circuits of a digital time multiplex-telephone network
|
|
US1755258A
(en)
|
|
Battery-charging circuits
|
|
US2985722A
(en)
|
|
Circuit arrangement for automatically regulating side-tone damping of telephone stations
|
|
JPS6226208B2
(cg-RX-API-DMAC7.html)
|
|
|
|
Grandstaff
|
|
Longitudinal Balance Measurement of Central Office Equipment |
|
JP3031518B2
(ja)
|
|
側音回路
|
|
US1433305A
(en)
|
|
Loaded-telephone-line system
|
|
Ganz et al.
|
|
Improvements in communication transformers |