IBM 3745 Series, Hardware Maintenance Reference

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One CA only can be looking at 'sample-bypass' line and one CA only can raise
'sample-bypass', the consequence is that only one CA or group of consecutive CAs
can be missing on the bus.
If a CA is TPS, the next CA must be replaced by a BPC card to propagate the
'sample' line.
BPC Card Installation Rules (Model 170)
Ÿ Channels adapters:
One BPC1 card is required in positions A2 and E2 for TPS.
Ÿ
Line adapters:
– If no TRA is installed:
- If no CSC is installed in position Q2:
No BPC1 or BPC2 are required.
- If a CSC is installed in position Q2:
One BPC1 is required in positions R2 and T2 if no CSC or CSP are
installed in these positions.
– If a TRA is installed:
One BPC1 is required in the free positions of the CSC and CSP cards.
Chapter 3. Buses
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