IBM 3745 Series, Hardware Maintenance Reference

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LIC Logical Addressing Function
LIC logical function allows selective scanning.
In the example of configuration changes hereafter:
Ÿ
The logical address function allows multi-configuration changes without card
plugging or unplugging.
┌──── LIC board ───────────────────────────────────────────┐
│
Physical addresses │
│ ð 1 2 3 4 5 6 7 │
│ ┌──────┬─────┬─────┬─────┬─────┬─────┬─────┬─────┬─────┐ │
│ │ DMUX │ LIC │ LIC │ LIC │ LIC │ LIC │ LIC │ LIC │ LIC │ │
│ │ Card │
A │ B │ C │ D │ E │ F │ G │ H │ │
│ └──────┴─────┴─────┴─────┴─────┴─────┴─────┴─────┴─────┘ │
│
9.6 256 1.2 1.2 1.2 64 64 9.6 │
│ Line speeds (kbps) │
└──────────────────────────────────────────────────────────┘
Ÿ
The customer may define several configurations without any physical LIC
changes. For example:
Physical addresses ð 2 7
┌──────┬─────┬─────┬─────┐
Configuration │ DMUX │ LIC │ LIC │ LIC │ 8 lines at 9.6 kbps
1 │ card │ A │ C │ H │ 4 lines at 1.2 kbps
└──────┴─────┴─────┴─────┘
Physical addresses 2 3 4 7
┌──────┬─────┬─────┬─────┬─────┐
Configuration │ DMUX │ LIC │ LIC │ LIC │ LIC │ 12 lines at 1.2 kbps
2 │ card │ C │ D │ E │ H │ 4 lines at 9.6 kbps
└──────┴─────┴─────┴─────┴─────┘
Physical addresses ð 2 3 6 7
┌──────┬─────┬─────┬─────┬─────┬─────┐
Configuration │ DMUX │ LIC │ LIC │ LIC │ LIC │ LIC │ 1 line at 64 kbps
3 │ card │ A │ C │ D │ G │ H │ 8 lines at 9.6 kbps
└──────┴─────┴─────┴─────┴─────┴─────┘ 8 lines at 1.2 kbp
Physical addresses 1
┌──────┬─────┐
Configuration │ DMUX │ LIC │ 1 line at 256 kbps
4 │ card │ B │
└──────┴─────┘
LIC Swap
The logical addressing function implemented in the 3745 LICs, allows LIC address
swap.
Supposing two LICs, one plugged at physical address A (LICA) and the other one
plugged at physical address H (LICH).
The logical addressing function allows to 'swap' the logical addresses between
LICA and LICH. For example, assign logical address A to LICH, and logical
address H to LICA.
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IBM 3745 Models 130, 150, 160, 170, and 17A: Hardware Maintenance Reference