Rddu Installation - Toshiba Strata DK14 Installation And Maintenance Manual

RDDU
Direct Inward Dialing Line Interface Unit
System:
DK40i Expansion KSU, DK424
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
Note For the system to recognize the DTMF tones generated by incoming DID lines a DTMF
Receiver Unit (RRCS -4, -8, or -12) must be installed on the DK40i Base KSU K4RCU3
or on any DK424 RCTU.
RRCS 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 (DK424 only), 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 7-12.

RDDU Installation

Note Switches are factory-set to the 0 (0 dB signal level drop) position.
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. (For DK40i, RDDU must be installed per
tables in Chapter 2 – DK40i Configuration.)
Each RDDU PCB uses four station ports in software. See Worksheets in Chapter 2 –
Important!
DK40i Configuration for recommended RDDU slot 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 5/99
DK40i/DK424 Universal Slot PCBs
PEPU2 External Page Interface Unit
Figure 7-18 and described in
7-33