Instruction manual

Strata DK General Description 6/00 39
Universal Slot PCBs 4
This chapter describes each of the PCBs that install into the universal slots of the Strata DK40i
Expansion KSU, the DK424i Base/Expansion Cabinets. The following paragraphs categorize the
cards according to their function.
Descriptions here apply to both DK40i, DK424i unless noted otherwise. The DK14 does not
support any universal slot PCBs.
Feature subassemblies that plug onto a universal slot PCB, such as the Standard Telephone
Interface Subassembly (RSTS), are listed below the associated PCB. For a list of available
subassemblies, see Table 28 on Page 45.
Station PCBs
Digital Telephone Interface Unit (PDKU2)
The PDKU2 has eight digital telephone circuits that can support digital telephones (cordless as
well as corded), integrated PC interface data units for data calling and/or TAPI application, off-
hook call announce, DDSS consoles or DADMs for attendant stations that must handle a heavy
load of calls, and a DDCB for a variety of applications.
Each of these devices only requires one circuit except for the integrated PC interface unit or
DADM, which shares a circuit with the telephone to which they are connected.
Digital/Standard Telephone Interface Unit (RDSU)
The RDSU in its basic configuration has two standard telephone circuits and four digital telephone
circuits (cordless as well as corded). The standard telephone circuits can support the same devices
that the RSTU2 can, with the exception of standard telephone message waiting lamps.
The digital circuits can support the same devices as the PDKU, except for the DDSS console. The
RDSU can be equipped with an RSTS subassembly to provide two more standard telephone
circuits, and an R48S subassembly to increase the standard telephone maximum loop length.
♦ DK40i – a K5RCU or K5RCU2 must be installed in the Base KSU to interpret DTMF tones
transmitted by devices connected to the standard telephone circuits.
♦ DK424i – a BRCS must be installed on the main processor PCB to interpret the DTMF signals
for devices connected to the standard telephone circuits.