Nortel DMS-100 Series Maintenance Manual page 154

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3-4 PRLCM overview

The ringing generators also produce voltages required for ANI and coin

control (48 V dc and 130 V dc). They monitor ANI and coin voltages and ring

bus outputs for failure.

Link control cards

The two LCCs ﬁll slots 17 and 18 of the HIE. Each LCC provides an interface

between eight DS30A ports from an PRLCM LCA shelf and the PCM30 links

to the host ofﬁce. The LCCs also provide an interface between the ESA

processor, if provisioned, and the ILCM. The following ﬁgure shows how the

PCM30 links are terminated on the LCC and in the LCA.

Figure 3-2 LCC interface to PCM30 interface cards

Under normal conditions, when both are active, LCC-0 connects LCA-0, and

LCC-1 connects LCA-1. LCC-0 serves even numbered PCM30 links (0, 2,

and 4) from the PCM30 interface cards, and LCC-1 serves odd numbered

PCM30 links (1, 3, and 5). The following ﬁgure shows how the LCCs are

conﬁgured in the PRLCM.

297-8361-550 Standard 04.01 September 2000

To host office

I/S: intershelf link

Troubleshooting