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Page 870 of 894 QPC841 Quad Serial Data Interface card
553-3001-211 Standard 2.00 September 2004
Applications
The QPD841 Quad Serial Data Interface (QSDI) card is used to connect the
switch to a variety of communication devices and peripherals. Any RS-232-C
compatible device can be connected to any of the four serial ports.
The standard application for the QSDI card is to connect the switch to the
system console. This can be either a direct connection if the console is located
near the switch, or through a modem for remote maintenance.
Bell 103/212 compatible dumb modems are recommended to connect a
remote data terminal. If a smart modem (such as a Hayes modem) is used,
select the dumb mode of operation (Command Recognition OFF, Command
Echo OFF) before connecting the modem to the asynchronous port.
Serial data interface connector J1 is a standard RS-232-C DB-25 connector
that connects port 1 of the QSDI card to outside peripherals. Connector J2 is
non-standard in that it contains the connections for the three remaining serial
ports (ports 2, 3, and 4), on a single DB-25 connector. An adapter cable must
be used to connect to standard RS-232-C peripherals. Cables that are
applicable to the QSDI card are:
• SDI male-to-female flat cables (internal module use only)
—NT8D82
— QCAD290
Note: This cable is available in different lengths. Refer to the Equipment
Identification (553-3001-154) for more information
—QCAD42
• SDI male-to-male round cables (external use only)
—NT8D95
• SDI to I/O cables (system options use only)
—NT8D82
Note: This cable is available in different lengths. Refer to Equipment
Identification (553-3001-154) for more information