Я слышал, что DSL препятствует нормальной работе некоторых элементов, использующих телефонные линии, таких как домашние будильники.
Прежде всего, возможно ли использовать факсимильный аппарат на одной линии с модемом DSL и соединением? И если так, должен ли факсимильный аппарат находиться за фильтром DSL или нет?
A fax machine uses the same frequencies that an analog telephone uses, so it should be connected in exactly the same way: behind the splitter.
The splitter filters out the higher ADSL frequencies for those devices, which otherwise might see interference and fail to function or even interfere with your ADSL signal.
Yes it should.
Generally speaking the terms "micro-filter", "splitter" and "ADSL filter" mean the same thing.
When your telephone line is ADSL enabled it is able to carry information on different frequency ranges: ADSL uses the higher frequencies to transmit data, whilst voice uses the lower frequency band.
Although you will still be able to use your telephone as normal once your line is activated, the transmission of adsl data on the line will cause interference.
In order that the adsl data does not interfere with the normal voice data (and vice-versa), you need to ensure you install a filter on each device that uses the lower frequencies. These devices are telephones, fax machines, answer phones, sky boxes.
Source ADSL Filters & Splitters
A microfilter is a device that allows broadband to work at the same time as your telephone service. Without microfilters you may get problems with your BT broadband or experience noise on your telephone line.
Normally, you'll need a microfilter for every telephone socket in your home where you've got some kind of telephony or broadband equipment plugged in. This equipment includes:
- Your BT Home Hub, or another type of broadband router or modem
- Telephones
- Answering machines
- Digital TV boxes (for example, Sky boxes)
- Fax machines
- Alarm systems
Source Why do I need ADSL filters (microfilters) and where do they go?