Sw1 Equalizer Switch And Loop Back Jumpers (Internal Option); Rdtu Installation - Toshiba STRATA DK14 Installation And Maintenance Manual

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T1
Slot Assignments
RDTU - T1 Interface Unit
System:
Circuits per PCB:
Interfaces with:
Older Version(s):
RDTU is configured for Tie or DID lines and an RRCS must be installed for DTMF operation.
LEDs on the RDTU show a continuous status of RDTU operation.
Note
RCTUE/F and B5CAU/BU can support up to eight RDTU PCBs.
o
o
RCTUC/D, B3CAU/BU and B2CAU/BU common control unit supports up to six RDTU
PCBs.
RCTUB, RCTUBA/BB and B1CAU support up to two RDTU PCBs.
o
o
RCTUA does not support the RDTU.
RDTU controls and interface connectors are shown in
The RDTU requires installation of a customer-provided Channel Service Unit (CSU). Refer to
"Installation Guidelines"
Testing procedures (local loop back and remote loop back) are in
8-14.

SW1 Equalizer Switch and Loop Back Jumpers (Internal Option)

The distance between the DK cabinets and the CSU (or other customer premise T1 circuit)
determines the setting of the SW1 Equalizer Switch. The SW1 switch consists of a bank of smaller
switches, S1~S7.
Set the SW1 switch as follows:
Mode
Short
Medium
Long
Note

RDTU Installation

Installing an RDTU (T1) into a Strata DK requires a number of system programs to be run.
Toshiba recommends running these programs in the order listed before actually installing the
RDTU into the system. This allows the RDTU to function immediately, including self-check loop
back testing and normal operation, when it is inserted into the system.
8-2
DK424, DK424i
8, 16, or 24 channels
ground start CO lines
loop start CO lines
DID or Tie lines
none
Each Tie or DID line decreases the system's station port and CO line capacity by one.
on
Page 8-8
Feet from DK
0~150
151~450
450~655
The maximum distance between the RDTU and the CSU or other T1 circuits can not be
more than 655 feet (see "RDTU to PBX T1 (Separated More Than 655 ft.)" on
Figure 8-2
for CSU installation.
S1
S2
S3
On
Off
Off
Off
On
Off
Off
Off
On
and described in
Table
"Loop Back Testing"
S4
S5
S6
Off
Off
Off
On
Off
On
Off
On
Off
Strata DK I&M
8-1.
on
Page
S7
S8
Off
N/A
Off
N/A
On
N/A
Page
8-10).
6/00

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