AT&T 3B2/300 Technical Reference Manual page 191

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CM195Y EPORTS CARD
The CMl 95Y Enhanced Peripheral Port Controller (EPORTS) Card provides eight separate
asynchronous serial ports (RS-232C input/output interfaces). The maximum throughput of the card is
38,400 bits per second.
The high performance capability of the CMl 95Y EPORTS Card is available only when an
accompanying EPORTS software is installed.
The CMl 95Y Card is a single-width card measuring 6.5 inches wide by 7.4 inches deep. The card
uses surface mounted technology. Figure 2-57 shows the component layout of a typical CM195Y
EPORTS Card. Connector pinout information is provided in Appendix B. The major components of
the CMl 95Y Card are listed below:
• An INTEL 80186 Microprocessor
• 128K bytes of Dynamic Random Access Memory (DRAM)
• 16K bytes of Read Only Memory (ROM)
• Four Dual Universal Asynchronous Receiver/Transmitter (DUART) chips.
EQUIPMENT DESCRIPTION 2-167