RAD Data comm E1 Interface Converter RIC-E1 Especificaciones descargar pdf (Pagina 88)

Appendix E IR-X.21B Interface Module RIC-E1 Installation and Operation Manual

E-2 Selecting the IR-X.21B Timing

E.2 Selecting the IR-X.21B Timing

IR-X.21B interface module supports two clock modes:

• EXT (external)

• INT/LBT (internal/receive).

You must set the IR-X.21B clock to match the timing you have selected for RIC-E1.

The clock settings are made via the JP2 jumper located on the IR-X.21B board, as

shown in Figure E-3.

JP2

EXT INT/LBT

Figure E-3. IR-X.21B Module Layout

EXT Clock Mode

The EXT clock mode is used in applications of X.21 networks where the system

timing is provided by the X.21 network. The IR-X.21B module has an internal

16-bit FIFO buffer to compensate for the phase delay introduced to the system by

the line delay between the two units. Figure E-4 illustrates the buffer connection

and the flow of the receive, transmit and clock signals.

When RIC-E1operates in the external clock, you must set the IR-X.21B JP2 jumper

to EXT.

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RAD Data comm E1 Interface Converter RIC-E1 Especificaciones Pagina 88