2 - 2 Chapter 2
Chapter 2 - Blade Installation and Startup
2.1.2 Order of Installing Extension Blades
The order that the station Blades (ESIU and SLIU) are physically inserted determines
the numbering plan.
For example, with a digital station blade (16ESIU) in slot #1 (ext. 301-316), when 3 additional digital station
blades are installed in the following order, the numbering plan below applies:
After the initial powering up of the system, subsequent powering up or resets will not change the slot
identification. System programming (Program 90-05) must be performed to change the slot identification.
2.1.3 Order of Installing Trunk Blades
2.1.3.1 Installing COIU, 4TLIU, DIOPU, or BRI Blades:
The order in which trunk blades are physically inserted determines the numbering plan.
For example, if four blades are installed in the following order, the numbering plan below would
apply:
2.1.3.2 Installing T1/PRI Blades
The T1/PRI Interface blade uses the first block of 24 consecutive trunks.
For example, if you have an 4COIU blade with a 4COIDB installed for trunks 1-8, the T1/PRI blade
will automatically use trunks 9-32. If you have 4COIU blade with a 4COIDB installed for trunks 1-8
and 17-24, the T1/PRI blade will use trunks 25-48. The T1/PRI blade cannot use trunks 9-16 (even if
available) since they are not part of a consecutive block of 24 trunks.
Order of
Install
Blade Slot # Ext Numbers
1 2 301-316
2 3 317-332
3 5 333-348
4 4 349-364
Order of
Install
Blade Slot # Blade Line Circuits
1 5 4COIU with
4COIDB
1-8
2 6 4COIU 9-12
3 8 4TLIU 13-16
4 7 4TLIU 17-20
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