0

How multiple telephones(Landline) transmit signals simultaneously? How the bandwidth is divided individually to make transmission happen individually?

1
  • Is this question about a network you own?
    – user253751
    Mar 3 at 10:26
0

Merging multiple individual signals/services/data paths together is called multiplexing. Depending how you actually do that there are several technologies:

  • time division multiplexing (TDM) - there are distinctive time slots that iterate over the services (e.g. most ISDN variants)
  • frequency division multiplexing (FDM) - each service uses a dedicated frequency band over copper (e.g. xDSL over POTS/ISDN)
  • wavelength division multiplexing (WDM) - each service uses one or more dedicated wavelengths/colors over fiber (e.g. for SONET or Ethernet WAN/MAN)

When it comes to packet switching, multiplexing a large number of data streams comes naturally (essentially a kind of dynamic TDM).

For POTS landlines, both TDM and FDM are (were) used. Both usually exclude the use of additional FDM for DSL.

Your Answer

By clicking “Post Your Answer”, you agree to our terms of service, privacy policy and cookie policy

Not the answer you're looking for? Browse other questions tagged or ask your own question.