Rdtu Cable Installation - Toshiba STRATA DK14 Installation And Maintenance Manual

Secondary Reference RDTU, the PSYNC LED on the Primary Reference RDTU turns on
steady and the SSYNC LED on the Secondary Reference RDTU will flash.
o Run Free (PSYNC/SSYNC) – If the RDTU PCB is the clock provider to the Far-end T1 span
circuit both the PSYNC and SSYNC LEDs are always Off.

RDTU Cable Installation

The RDTU PCB is shipped with a Toshiba NDTU cable for connecting the RDTU PCB to a CSU.
The NDTU is a 30 ft. cable and is specially made to conform with EIA specifications (see
8-7).
All other cables required to connect the T1 span line to the RDTU PCB are customer-supplied and
must conform with EIA specification, see the Notes of
supply cables that comply with T1 span specifications for connecting the CSU to customer
premise equipment (like DK, RDTU) to the Network Interface equipment.
(4) T
Network
(5) R
Interface Unit
USOC-RJ48C
(1) T1
or RJ48X
(2) R1
8-Pin Modular
(RJ45 Type Jack)
CPE T1 (PBX
or Key
System) or
Channel Bank
Figure 8-7 RDTU Cable Connections
Notes
Pins 2 and 4 of the DB-15 connector in most CSUs are frame ground. No connection is
G
required.
NDTU cable is supplied with RDTU PCB (30 ft. maximum).
G
Set RDTU SW1 switch for proper loop length per DK14.
G
Customer-supplied span cables must be 22 AWG, ABAM cable or, if using standard 24 AWG
G
twisted pair, the transmit pair must be separated from the receive pair by at least 5-cable pairs.
Most CSU manufacturers supply cables to connect the CSU to the Network Interface Unit or
other CPE equipment.
Strata DK I&M 6/00
RDTU To Network or Long Distance T1 Provider
Customer Supplied
Cable (See Notes)
(1)
(9)
Customer-
supplied
(3)
CSU
(11)
DB-15
Connector (Female)
RDTU To Customer Premise Equipment (CPE) T1
Customer-supplied Cable (See Notes)
Black
Red
White
Green
655 Feet Maximum
Figure 8-7. Almost all CSU manufacturers
NDTU Cable (30 ft. Maximum)
(1) Black T (26)
(9) Red R (1)
(3) White T1 (27)
(11) Green R1 (2)
NDTU DB-15
Connector (Male)
Transmit
T (26)
R (1)
RDTU PCB
T1 (27)
R1 (2)
Receive
RDTU Amphenol
T1
Hardware and Cabling
Figure
Transmit
RDTU PCB
Receive
NDTU
Amphenol
Connector (Male)
1670
8-13