Programmers in the telecommunications division have written a program in the telecommunications billing software that eliminates from the tape those call records made on the three tie trunks
to the PBX.
Today, an InstantOffice system at the company's Joplin headquarters has a T1 connection from Southwestern Bell that offers a 384K Frame Relay connection and voice tie trunks
to another InstantOffice system at its Springfield branch office.
A vast network of private lines, tie trunks
, off-premise extensions, and other leased facilities exists in North America, and many businesses have access to these.