Transparent Application; Figure 4-5. Transparent Bop Application - ADTRAN Express 5200 User Manual

Chapter 4. Applications

Transparent Application

In cases when the user protocol is not supported by the
Express 5200, the transparent mode may be used. Transparent bit-
oriented protocol (BOP) or transparent asynchronous protocol may
be selected. This can be used for point-to-point connections only
because the Express 5200 is transparent to the protocol address
formats.
In the T
HDLC-like protocol and encapsulates the information field of the
HDLC frames, transporting them across the frame relay network to
the specified virtual circuit and remote Express 5200 port number.
The incoming frames must be spaced with at least one flag byte
(0x7E) and contain two bytes of CRC16 at the end of each frame.
Asynchronous protocols are supported by using the T
A
SYNC
encapsulates the data portion of each character for transport across
frame relay using a programmable DLCI and remote Express 5200
port number.
See Figure 4-5 and Table 4-4 for an example of a transparent BOP
configuration. See Figure 4-6 and Table 4-5 for an example of a
transparent asynchronous application.
4-10
BOP protocol, the Express 5200 accepts an
RANSPARENT
mode. The Express 5200 buffers async characters and

Figure 4-5. Transparent BOP Application

Express 5200 User Manual
RANSPARENT
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