Esa Hardware - Nortel DMS-100 Series Maintenance Manual

ESA hardware

The additional hardware for the PRLCM equipment frame consists of the
following circuit cards:
• one ESA processor card, NT6X45AF
• one 2-Mbyte memory card, NT6X47AB, or one 4-Mbyte memory card,
NT6X47AC
• one ESA clock and tone card, NT6X75AA
For a block diagram of an PRLCM with the ESA hardware see the figure
PRLCM with ESA Hardware Block Diagram.
NT6X45AF - ESA processor card
This is the same processor card that is used in the LTC. The LTC processor
card, when used in the PRLCM equipment frame, is called the ESA processor.
NT6X47AB - 2-Mbyte memory card
This is the same memory card that is used in the LTC. This card provides the
memory required by the ESA processor and is used for call processing when
the PRLCM enters ESA mode.
NT6X47AC - 4-Mbyte memory card
This is the same memory card that is used in the LTC. This card contains 4
Mbyte of memory, of which 3 Mbyte may be used for call processing when the
PRLCM enters ESA. The NT6X47AC is required for ESA loads for BCS33
and up.
NT6X75AA - ESA clock and tone card
This card provides the following:
• a frame pulse for clock generation during ESA mode to replace the lost
PCM30 frame pulse from the host
• tones to an LCM during ESA
• an interface so the ESA processor can send and receive messages to and
from the host during normal operations. During ESA mode, this card
communicates with both units of the LCM and the RMM.
The ESA memory card, processor, and clock and tone card occupy slots 14, 15,
and 16, respectively, on the HIE shelf.
NT2X48AB - Digitone receiver card
The Digitone receiver (DTR) card is required in the RMM for ESA operation.
The ESA processor brings the DTRs into service when in ESA and turns them
off when coming out of ESA. A single card four-channel DTR, NT2X48BB,
is also used in the RMM for ESA Digitone calls. In addition to Digitone
reception, the RMM provides diagnostics for the ESA processor.
DMS-100 Family OPM Maintenance Manual XPM14 and up
PRLCM overview 3-13