ADTRAN Atlas 550 - Manual (Page 220)

Appendix B. OSI Model and Frame Relay Technology Overview
B-8 ATLAS 550 User Manual 61200305L1-1
TBOP
Transparent Bit Oriented Protocol (TBOP) is an ADTRAN-proprietary
protocol that is used to transmit HDLC-formatted traffic across the frame
relay network. TBOP allows the transportation of protocols “unknown” to
the ATLAS 550 to be encapsulated in frame relay and sent to a remote
location via frame relay. This protocol can be useful in transporting other
vendors’ proprietary protocols across the WAN.
The ATLAS 550 accepts HDLC-formatted data on one of the V.35 or T1 ports
and forwards that data across a frame relay network to another ATLAS or
an ADTRAN frame relay device (for instance, if the ATLAS 550 is
communicating with an IQ product).
This overview is not intended to be all inclusive of the operation
of a frame relay network. It is intended to help simplify the frame
relay configuration within the ATLAS 550.