Memory Expansion Circuit Pack; General Description; Replacing The Memory Expansion Circuit Pack - Northern Telecom BCS35 Replacement Manual

Card replacement guide, distributed processing peripheral

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Memory expansion circuit pack

The Expanded Memory circuit pack in slot 3 of the A and B chassis provides

Dynamic Random Access Memory (DRAM) for temporarily storing various

data in the DPP. DRAM is refreshed periodically by the CPU to maintain its

programmed state. Each expanded memory circuit pack contains up to 256

Kbytes (262,144 bytes) of DRAM. On the system level, DRAM provides

storage of temporary data, such as system calculations, and updating of

statistics.

See Table 4–1 for the jumper option settings on this circuit pack (these are

standard, not user–defined). Figure 4–1 shows jumper location and circuit

pack layout.

To replace the Memory Expansion circuit pack, use the following

procedure.

DPP Card Replacement Guide BCS35 and up

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