Rddu - Direct Inward Dialing Line Interface Unit; Rddu Installation - Toshiba STRATA DK14 Installation And Maintenance Manual

RDDU – Direct Inward Dialing Line Interface Unit
System:
DK40i Expansion KSU, DK424, DK424i
Circuits per PCB:
four DID lines
Interfaces with:
DID (one or two-way) lines
Older Version(s):
none
The RDDU provides four Direct Inward Dialing (DID) lines, each of which can have a single
office code along with a block of extensions.
For the system to recognize the DTMF tones generated by incoming DID lines a DTMF
Note
Receiver Unit (RRCS -4, -8, or -12) must be installed on the DK40i Base KSU K4RCU3,
or on any DK424 RCTU or DK424i BCU.
BRCS is not required for RDDU dial pulse operation (see Program 30, LED 11).
Each extension can be assigned to ring a station [DN] that appears on one or multiple stations,
Distributed Hunt or ACD Group (DK40i, Release 4.2 and higher or DK424 or DK424i), or an
external telephone number selected in system programming. This enables calls over the same line
to be routed to different stations or groups of stations. An extension can also be assigned to ring
the maintenance modem. Each RDDU can be set for either wink start or immediate. All RDDU
lines support DNIS and ANI features.
RDDU controls, indicators, and interface connectors are shown in
Table 9-13.

RDDU Installation

Switches are factory-set to the 0 (0 dB signal level drop) position.
Note
1. If the KSU is located within one mile of the PBX or CO, set dB PAD switches SW101 through
SW401 to the 3 (-3 dB signal level drop) position to control excessive loudness resulting from
close proximity to the PBX or CO.
2. Sensitivity jumpers P101~P401 are used mostly for dial pulse operation, to adjust for dial
pulsing at different loop lengths. If close to the central office, the sensitivity should be set for
low (L); as the loop length increases, it should be set to medium (M), then high (H).
3. Insert the RDDU (component side facing right) into the appropriate slot and apply firm, even
pressure to ensure proper mating of connectors.
Important! Each RDDU PCB does not use uses four station ports in software with DK40i,
DK424 or DK424i Release 4.0 and higher. DK40i must be installed per
DK40i Configuration
assignments).
4. After installing the RDDU, gently pull the PCB outward. If the connectors are properly mated,
a slight resistance is felt.
Strata DK I&M 6/00
(see Configuration Worksheets for recommended RDDU slot
Universal Slot PCBs
PCB Chapter Layout
Figure 9-20 and described in
Chapter 2 –
9-37