CANOGA PERKINS 2240 Fiber Optic Modem - Manual (Page 67)

Chapter 4 Data Interfaces
Programmable Buffered Interface/Model P53
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Figure 4-4 BNC Connectors
4.9 Programmable Buffered Interface/Model P53
The Model P53 Interface Module complies with EIA Standard RS-530 while all clock, data and
control signals follow the RS-422 standard. The basic configuration of the P53 interface is a DCE
device (w/Fem DB-25) and two connector adapters are provided with the interface: the DCE/DTE
adapter which converts the interface to the DTE form (w/Male DB-25) and the "Legacy" adapter
which converts the interface to the original Model P2 interface.
This interface implements a set of circuits (resources) which can be interconnected in various
ways to satisfy a host of differing applications. These resources are:
• a 16-bit FIFO (first-in, first-out) buffer
Table 4-16. BNC Supported Signals
Signal Full Name Direction
TxD Transmit Data To Modem
RxD Receive Data From Modem
SCR Serial Clock Receive From Modem
SCT Serial Clock Transmit From Modem
SCTE External Clock Transmit To Modem
Receiver Clock
Received Data
Transmitted Data
Transmitter Clock
External
Transmitter Clock
or