Black Box IS300AE, Руководство пользователя

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Chapter 6: Installing and Configuring Software in your Computer
6.6 Configuring the ISDN TA/V DTE Interface and Line Interface
It would be logical to assume that because the serial port of your computer
needs to be configured (with respect to the data rate, flow-control method
and data format), the ISDN TA/V’s
DTE
and
LINE
ports would require the
same. However, one of the many features of your ISDN TA/V is its ability to
automatically sense the serial port settings of the PC (when it receives a
command line originated from the PC), and the ISDN line rate. Your ISDN
TA/V will adjust its operating characteristics accordingly, thus ensuring
compatibility with the attached device.
Note that for efficient and uninterrupted data transfer, it is important that
the data rate of the ISDN line is slower than the data rate of the DTE
interface. If this situation is reversed, data arriving on the line will overflow
the ISDN TA/V’s buffers while waiting to be sent from the DTE interface to
your computer. A data overflow means lost data.
Under normal operating circumstances, the ISDN TA/V attached to the
remote computer will also be able to auto-sense the line, and lower, or raise,
its transmission speed to suit your ISDN TA/V. For this reason, there is no
need for any configuration changes to your ISDN TA/V’s default settings
unless you detect an incompatibility with the remote computer.