Toshiba Strara CTX Series, Installation And Maintenance Manual, Page: 127 / 290

PCB Installation
4-5
Strata CTX I&M September 2002
BDKU/BDKS – Digital Telephone Interface Unit
Circuits per PCB:
eight digital telephone circuits (plus eight more with the BDKS PCB)
Interfaces with:
all Toshiba digital telephones (DDCB, DSS, ADM, BPCI)
Older Version(s):
none
BDKU Hardware Options
BDKU can be equipped with a BDKS piggyback PCB to provide a total of 16 circuits. Refer to
Chapter 7 – Station Apparatus for instructions on how to connect digital telephones, DDCBs, and
DDSS consoles to the BDKU/BDKS, as well as how to upgrade digital telephones with these options:
a PC Interface Unit (BPCI), a Speaker Off-hook Call Announce upgrade (BVSU), and a Headset/
External Speaker (BHEU). The BDKU can be installed alone, or with the BDKS subassembly.
BDKS
The BDKS can be installed onto the BDKU to add eight more digital telephone circuits.
➤
To install the BDKS
➤
Match the BDKS connectors to the BDKU, as shown in Figure 4-3 . Press firmly to ensure that the
connectors are snug.
BDKU Installation
1. Set the BDKU/PDKU switch for the appropriate system (refer to Figure 4-3 and Table 4-4 ).
2. Insert the BDKU2 (component side
facing right) into the appropriate slot,
and apply firm, even pressure to ensure
proper mating of connectors. Refer to
“Strata CTX670 Cabinet Slot
Configuration” on Page 1-23
to ensure
the BDKU is in a suitable slot.
3. Install the Ferrite Core (comes with the
BDKU) onto the 25-pair cable that
connects the BDKU to the MDF: Flip
open the two snaps on the Ferrite Core,
then snap it shut around the BDKU cord
as shown in
Figure 4-2 . The core must be
as close as possible to the BDKU.
The core is needed to comply with EU
requirements.
4. Some Ferrite Cores require a tie-wrap at
the bottom to keep it from sliding. For
those, feed the tie-wrap through the slots
in the Ferrite Core, then cinch it.
S104
5845
F errite Core
T
ie Wrap
Figure 4-2 BDKU Ferrite Core