BE465943A - - Google Patents
Info
- Publication number
- BE465943A BE465943A BE465943DA BE465943A BE 465943 A BE465943 A BE 465943A BE 465943D A BE465943D A BE 465943DA BE 465943 A BE465943 A BE 465943A
- Authority
- BE
- Belgium
- Prior art keywords
- telephone
- line
- relay
- time
- ringer
- Prior art date
Links
- 108060008443 TPPP Proteins 0.000 claims description 19
- 230000000694 effects Effects 0.000 claims description 4
- 239000004020 conductor Substances 0.000 claims description 2
- 239000003990 capacitor Substances 0.000 description 3
- 230000000875 corresponding Effects 0.000 description 1
- 230000001264 neutralization Effects 0.000 description 1
- 230000001629 suppression Effects 0.000 description 1
Classifications
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04M—TELEPHONIC COMMUNICATION
- H04M1/00—Substation equipment, e.g. for use by subscribers
- H04M1/66—Substation equipment, e.g. for use by subscribers with means for preventing unauthorised or fraudulent calling
- H04M1/663—Preventing unauthorised calls to a telephone set
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04M—TELEPHONIC COMMUNICATION
- H04M1/00—Substation equipment, e.g. for use by subscribers
- H04M1/64—Automatic arrangements for answering calls; Automatic arrangements for recording messages for absent subscribers; Arrangements for recording conversations
- H04M1/65—Recording arrangements for recording a message from the calling party
Landscapes
- Engineering & Computer Science (AREA)
- Signal Processing (AREA)
- Computer Security & Cryptography (AREA)
- Devices For Supply Of Signal Current (AREA)
Publications (1)
| Publication Number | Publication Date |
|---|---|
| BE465943A true BE465943A (da) |
Family
ID=117371
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| BE465943D BE465943A (da) |
Country Status (1)
| Country | Link |
|---|---|
| BE (1) | BE465943A (da) |
-
0
- BE BE465943D patent/BE465943A/fr unknown
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