Instruction manual

Universal Slot PCBs
Console PCBs
Strata DK General Description 6/00 41
This PCB also supports the Message Waiting feature on standard telephones that are equipped with
a 90VDC neon message waiting lamp.
The RSTU2 also provides an 80V RMS sine wave ring generator and has interface connectors for
an optional R48S subassembly that increases the maximum possible station loop length from 600
to 1200 ohms.
♦ 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.
48V Loop Voltage (R48S)
The optional R48S unit can be connected to the RSTU2 or RDSU and, by creating 48V loop
voltage instead of 24V, can extend the maximum possible loop length of standard telephone
circuits (including the resistance of the phone) from 600 ohms to 1200 ohms, allowing standard
telephones to be connected farther from the system. By using this unit, a less expensive type of off-
premises lines can be used (see Table 28 on Page 45).
Console PCBs
Attendant Console Interface Unit (RATU, DK424i only)
The RATU can support four attendant consoles. Multiple consoles enable automatic load-sharing
on a rotation basis from a central call queue, increasing call handling efficiency. The RATU PCB
in the Strata DK424i system cabinets connects to the PC Attendant Console Interface (RATI) via
two pair of wires.
One RATU is available per system to support a maximum of four Attendant Consoles per system
with B5CAU/B5CBU, two with B2CAU/B2CBU or B3CAU/B3CBU (any combination of PC or
conventional consoles).
CO Line PCBs
A summary of Strata DK station, CO line PCBs and feature subassemblies are listed in Table 28 on
Page 45.
Caller ID Interface Unit (RCIU2)
The RCIU2 is required, along with an analog ground/loop start CO line PCB, to provide the Caller
ID feature. Caller ID is also known as CLID and is available at extra cost per line from the local
Telco. It is sometimes known as a CLASS feature.
Each RCIU2 circuit receives and decodes telephone number and name information sent from the
calling CO. Caller ID is available on analog loop start lines and analog ground start lines only. An
RCIU2 circuit must be available with each RGLU2, RCOU/RCOS, PCOU or KCDU2 circuit that
is to receive Caller ID. Built-in gas tubes help protect each RCIU2 circuit from lightning surges.
An RCIS subassembly PCB can be installed onto the RCIU2 to provide four additional Caller ID
circuits.
Caller ID Interface Subassembly (RCIS)
The RCIU2 comes equipped with four Caller ID circuits; an RCIS subassembly PCB can be
installed onto the RCIU2 to provide four additional Caller ID circuits. Hence, an installed RCIU2/