Logical addressing improves the flexibility of LIC attachment. LICs can be placed
anywhere without regard to the scanning sequence or LIC weight. High-speed
LICs can come before or after low-speed LICs and there can be open LIC
positions.
Selective scanning allows an LSS to run multiple line configurations at different
times. It also simplifies configuration and installation of LICs attaching
higher-speed lines (256 kbps) with other LICs.
Notes:
1. It is the user's responsibility to ensure that the currently-active line configuration
does not overload the scanner processing capability. See the explanation of
line weights on page 4-11 and also in the
IBM 3745 Configuration Program,
GA33-0093.
2. A scanner cannot recognize a change in line configuration, and is likely to
become overloaded. It is necessary that an active configuration is completely
deactivated before another configuration is activated, for example, changing
from night operation to day operation.
Chapter 4. Controller Description
4-9
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