Nortel DMS-100 Series Maintenance Manual page 174

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4-6 ESA maintenance overview

NT6X47AC - 4 Mbyte memory card

This card is the same memory card used in the LTC. This card contains 4

Mbyte of memory. The system uses 3 Mbyte of memory for call processing

when the RLCM enters ESA. The 6X47AC is required for ESA loads for

BCS33 and higher.

NT6X75AA - ESA clock and tone card

This card provides the following:

NTMX45AA - ESA processor card

This card is an improvement over the NT6X45AF ESA processor. Eight

megabytes of on-card memory enable duplicate Nxx numbers in ESA mode.

This card also supports in-service firmware downloads. With this ESA

processor, the NT6X47AC ESA memory card is not needed and slot 14 of the

HIE shelf has a filler plate.

The components appear in figure "Host interface equipment shelf."

Figure 4 Host interface equipment shelf

HIE: NT6X11AA

01 02 03 04 05 06 07 08 09 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25

297-8361-550 Standard 04.02 December 2004

A frame pulse for clock generation during ESA mode to replace the lost

DS-1 frame pulse from the host.

Tones to an LCM during ESA.

An interface for the ESA processor. The ESA processor can send and

receive messages to and from the host during normal operations. During

ESA mode this card communicates with the LCM units and the RMM

Troubleshooting