Summary

This Recommendation defines terminal adaptor (TA) functions for the connection of terminals having interfaces conforming to current V-series Recommendations to the ISDN for both circuit switched and leased circuit services. This includes the following functions:

–           conversion of electrical and mechanical interface characteristics;

–           bit rate adaption;

-           end-to-end synchronization of entry to and exit from the data transfer phase;

-           call establishment and disestablishment based on either manual or automatic calling and/or automatic answering;

-           local and end-to-end flow control to support DTEs of differing rates.