Automatic answering equipment and general procedures for automatic calling equipment on the general switched telephone network including procedures for disabling of echo control devices for both manually and automatically established calls
This Recommendation is concerned with the setting-up of a data connection when Data Circuit-terminating Equipment (DCE) comprising automatic answering equipment is used over international circuits. Automatic calling procedures are defined in Recommendations V.25 bis and V.25 ter. This Recommendation describes the sequence of events involved in establishing a connection between an automatic calling data station’) and an automatic answering data station for V-Series Recommendations modems specified for general switched telephone network operations.