Nortel 600 Series Manual page 63

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August 2006
OUTPUT and INPUT streams according to how the SDI port is assigned in the
DMO field as follows:
SDI port assigned to TTY (terminal equipment or terminal program):
- OUTPUT: the highest order bit (8) is forced in software to space (0).
The remaining seven bits represent the ASCII character. Thus, the
configuration setttings of the terminal or terminal program should be:
7 bits data, space parity, and 1 stop bit.
Alternatively, a terminal setup of 7 bits, mark parity, and 1 stop bit can be used if
the terminal ignores parity. Consult an operator's manual for the terminal or
program if necessary. The SDI does not support an extended ASCII character set
on devices capable of displaying extended ASCII when the eighth bit is set to
mark (for example, interfacing to DOS-compatible PCs or terminal programs).
- INPUT: eight bits are input and echoed; the highest order bit is
ignored by software. This does not affect terminal settings.
SDI port assigned for applications that use an eight-bit data stream (that is,
MDR, SCCS, SMDI). These applications are non-ASCII based and the
equipment outputs and inputs 8 data bits.
- OUTPUT: all eight bits are transmitted.
- INPUT: all eight bits are received and processed.
Note 3: At baud rates above 1200, caution should be used when interfacing with
equipment other than man-machine interface equipment. The rate of data transfer
associated with machine-machine interfaces can exceed the buffer capacity of the
I/O system, which can result in loss of data.
For Generic 602.20
Switch settings for printed circuit packs
08.01
2-56
NTP 297-3601-316