Toshiba Strata DK 280 Installation Manual page 628

11.3.3
RDTU to PBX
Tl
(Separated Less
Than 655 ft.)
If the RDTU is within 655 ft. of the far-end PBX Tl
circuit, a CSU is not required (see Figure 1 l-3).
However, connecting a RDTU Tl span to another PBX
or Key/Hybrid Tl, in a tie line configuration at a
distance less than 655 ft. (without a CSU) will require
a customer provided special cable (see Figure 11-3).
The transmit and receive pair of this span cable must
be separated by at least five cable pairs and the wires
must be 24 AWG, twisted pair, otherwise 22 AWG,
ABAM type cable must be used.
4
Two CSUs (customer provided) are required if the
RDTU is more than 655 ft. from the customer premise
channel bank (Figure 11-4); CSUs are not required if
the RDTU is less than 655 ft. from the channel bank
(Figure 1 l-3).
11.4 RDTU (Tl) System Programming
Installing a RDTU (Tl) into a Strata DK280 requires a
number of system programs to be run. It is
recommended to run these programs in the order
listed below before actually installing the RDTU into
the system. This will allow the RDTU to function
immediately, including self-check loop back testing
and normal operation, when it is inserted into the
system. Use the instructions provided below and use
the appropriate systems record sheets to record and
enter the data for each of the programs listed.
1. Run Program OS-Assign the number of RDTU
channels used and the cabinet slot number into
which the RDTU will be installed (see Subsections
11.2.1 and 11.2.2). If 1-8 channel are required,
assign code 71, if 1-16 channels are required,
assign code 72, or if 1-24 channels are required,
assign code 73 to the RDTU slot. Also, assign
RRCS code to RCTU if RDTU tie/DID channels
are DTMF.
IMPORTANT!
Special consideration must be taken when
installing tie or DID Tl channels (see
Worksheet 2 of Chapter 1.
2. Run Program *41-2-Assign each channel for
loop start, ground start tie (Immediate or Wink), or
DID (Immediate or Wink)'. See Program x41-2
record sheet (unused channels can remain as
initialized-loop start).
3. Turn system power supply OFF (five seconds) and
ON to activate Program 03 and *41-2 program
data.
Note:
These are the only programs relating to
RDTU operation that require system power to
be cycled OFF and ON.
4. Run Programs 16, 40, 39-If an RDTU is
connected to a fractional Tl circuit and all the
STRATA DK280
R(1) 4
"41:" T (26) 4
RI
(2) 4
Tl (27) 4
CUSTOMER
PROVIDED SPECIAL
CABLE/CONNECTORS
RDTU -
TRANSMIT
RDTU +
RECEIVE
PBX OR OTHER CP
e (2) Rr
PBWKEY
) (27) Rt SYSTEM
-OR-
t (1)Tr
CHANNEL
BANK
) (26)
Tt
.RDTU AMPHENOL
CONNECTOR 1 (MAXIMUM 655 FT.) .
PBX AMPHENOL
(PIN NO.)
CONNECTOR
General Note:
l
Special cable and connectors provided by customer. (See Subsection 11.54.) ,
DK0511
Figure 11-3
Required Cables/Connectors for RDTU Connection at Distances of Less Than 655 Feet (200 Meters)
11-4
January
1996