1. Home
  2. IT
  3. Networks and Telecommunications
  4. Fax

  5. Switched telephone network (PSTN) services

Article | REF: TE7650 V1

Fax

Authors: Bernard REVILLET, Gérard BOULAY, Jean-Paul DICK, Jérôme CUDELOU

Publication date: May 10, 2001

You do not have access to this resource.
Click here to request your free trial access!

Already subscribed? Log in!

2. Switched telephone network (PSTN) services

2.1 Services

On the telephone network, initially dedicated to voice transmission, the fax protocol provides for the possibility of alternating fax transmission and telephone retention within the same call. Today, most telephones/fax machines offer this possibility. While switching from voice mode to fax mode seems almost natural (it's what you do implicitly when you press the fax button after lifting the handset and dialing), switching from fax mode to voice mode can only be done at specific points in the transmission: either at the end of a page, or at the end of the entire document. This function enables both parties to comment on a document they have just exchanged.

You do not have access to this resource.

Exclusive to subscribers. 97% yet to be discovered!

You do not have access to this resource.
Click here to request your free trial access!

Already subscribed? Log in!

The Ultimate Scientific and Technical Reference

A Comprehensive Knowledge Base, with over 1,200 authors and 100 scientific advisors
+ More than 10,000 articles and 1,000 how-to sheets, over 800 new or updated articles every year
From design to prototyping, right through to industrialization, the reference for securing the development of your industrial projects

This article is included in

Networks and Telecommunications

This offer includes:

Knowledge Base

Updated and enriched with articles validated by our scientific committees

Services

A set of exclusive tools to complement the resources

Practical Path

Operational and didactic, to guarantee the acquisition of transversal skills

Doc & Quiz

Interactive articles with quizzes, for constructive reading

Subscribe now!

Ongoing reading
Switched telephone network (PSTN) services
Outline