
T1 and E1 frame structure is different from the T1 and E1 circuits are based on PCM voice transmission standards established in the 64k on the same road -- can be so transparent voice transmission, of course, the use of appropriate converters can be transmitted data. But between T1 and E1 frame structure needs a change of equipment, structures for such a long circuit, and need to hire telecommunications, telecommunications change things for you to do. You do not have to worry about, as long as your application can be a plus.