Appendix B. OSI Model and Frame Relay Technology Overview

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.

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).

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