Northern Telecom DMS-100 Series Maintenance Manual page 20

1-10 Understanding the PCM30 line drawer
Two host LCMs, each one supporting a maximum of ten PLDs, are housed
in a standard DMS-100 single-bay frame that is referred to as a line
concentrating equipment frame. A maximum of 20 PLDs are assigned in one
line concentrating equipment frame, as shown in Figure 1-6.
Within each PLD are two line subgroups or logical drawers. The upper part
of the drawer is the even-numbered subgroup and the lower part is the
odd-numbered subgroup. Within the standard line drawer, however, the
upper part of the drawer is the odd-numbered subgroup and the lower part is
the even-numbered subgroup.
Also included in the line concentrating equipment frame are baffle and fuse
panels and a frame supervisory panel, which contains two ringing generators
(NT6X30AB).
297-2101-504 Standard 02.01 December 1991