Nortel DMS 100 Series Maintenance Manual page 36

2-20 Maintenance overview
two PCM30 packlets on the Quad Frame Carrier and the Enhanced Matrix
(NTMX75).
Note: When the system provisions NTMX87 and four NTMX82AA
packlets are not required, the NTMX83 filler packlets are inserted. This
action allows fan units to provide correct cooling to the unit.
On the C-side of the RSC-M, 16 PCM30 links connect each shelf to a
LGCOi+. The maximum C-side channel capacity of a cabinet with three
RSC-M main shelves is 1380.
The Enhanced Matrix circuit card (NTMX75) is non-blocking. This card
performs all the switching functions that the RSC-M shelf and the EXT shelf
require. The Enhanced Matrix circuit card is a single-stage time switch with
2528 input and output channels. A channel can switch to any free channel.
Input and output consist of two groups:
•
•
Processor
card controls RSC-M main and EXT shelf activities. Memory of the UP circuit
card is consolidated on the circuit card. The memory provides
electrically-erasable programmable read only memory (EEPROM). This
circuit card has two FLASH EEPROMs. A FLASH EEPROMs is a 256kbyte
programmable chip. This condition allows operating company personnel to
load firmware on a manually-busied (ManB) RSC-M. Operating company
personnel can only load firmware that is separate from the random access
memory (RAM) load. Operating company personnel use the following
command strings to load the firmware with the PM posted:
>LOADFW PM
or
>LOADFW UNIT unit_no
or
>LOADFW INACTIVE
297-8223-550 Standard 04.02 November 2000
C-side, 640 channels of which 128-channels are for service circuits
P-side, 1888 channels
The Unified Processor (UP) (NTMX77) 68020 CPU circuit