Section 2: PCB Installation and Startup
2-2 Section 2: PCB Installation and Startup Aspila EX Hardware Man-
Order of Installing Extension PCBs
The order that the station PCBs (e.g. ESIU and SLIU) are physically inserted determines the
numbering plan.
For example, with a digital station card (16ESIU) in slot #1 (ext. 301-316), when 3 additional digital
station cards 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 identifica-
tion.
Order of Installing Trunk PCBs
Installing COIU-LS1/LG1, 4TLIU, DIOPU, or BRI PCB’s:
The order in which trunk PCBs are physically inserted determines the numbering plan. For
example, if four PCBs are installed in the following order, the numbering plan below would
apply:
Installing PRI PCBs
The PRI Interface PCB uses the first block of 32 consecutive trunks.
For example, if you have an 8COIU PCB installed for trunks 1-8, the PRI PCB will automati-
cally use trunks 9-40. If you have 8COIU PCBs installed for trunks 1-8 and 17-24, the PRI
PCB will use trunks 25-56. The PRI PCB cannot use trunks 9-16 (even if available) since they
are not part of a consecutive block of 32 trunks.
Order of Install PCB Slot # Ext Numbers
1 1 200-215
2 2 216-231
3 4 232-247
4 3 248-263
Order of
Install
PCB Slot # PCB Line Circuits
148COIU1-8
254COIU9-12
3 7 4TLIU 13-16
4 6 4TLIU 17-20
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