Code and Speed-Dependent TDM 600 bit/s System for Use in Point-to-Point or Branch-Line Muldex Configurations - Telegraph Transmission (Study Group IX) 6 pp
The CCITT,
considering
(a) that telex subscribers are often geographically located in small groups;
(b) that TDM multiplexing systems are economical for the transmission of large numbers of channels;
(c) that certain telex switches handle TDM frames in accordance with Series-R Recommendations directly
(d) that telex switches handle channels at 50 bauds and a 7.5 unit code;
(e) that a facility for regenerating start-stop signals is used in new TELEX networks;
(f) that the branch-line multiplexing system should be capable of accepting and regenerating all the
(g) that the minimum signal transfer delay through TDM systems is achieved by the transmission of
and that frame fi11 should be optimized;
signals of the TELEX signalling system;
interleaved elements,
recommends
equipment shall comply with the following standards:
that, where banch-line remote or low multiplex capacity TDM systems are to be used for telegraphy, the