Toshiba Strata DK14 Installation And Maintenance Manual page 137

Notes
When installing 16 or 24 channel RDTU PCBs into a slot, the
next slot or two slots may not be usable for other PCBs
4-4 and 4-5 and Worksheet 2.)
RDTU provides either 8, 16, or 24 channels (lines), depending
on programming. Each channel can be set for either DID,
ground start CO, loop start CO, or Tie line operation. (Each
RDTU Tie line or DID line reduces the system line and station
port capacity by one port.)
As many as six RDTU PCBs can be installed in systems
operating with the RCTUC/D common control unit, as many as
two with RCTUB operated systems. The RCTUA does not
support RDTU.
Prior to Release 4, each Tie or DID line reduced system
station capacity by one port. With Release 4, Tie and DID lines
do not use station ports.
9. Add totals from Steps 1~7.
Strata DK I&M 5/99
Worksheet 1 – System PCB (Slot) Requirements
(Tables
Total CO Line PCB slots required
DK424 Configuration
4-25