Toshiba Strata DK14 Installation And Maintenance Manual page 225

(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
Notes
Pins 2 and 4 of the DB-15 connector in most CSUs are frame ground. No connection is
required.
NDTU cable is supplied with RDTU PCB (30 ft. maximum).
Set RDTU SW1 switch for proper loop length per DK14.
Customer-supplied span cables must be 22 AWG, ABAM cable or, if using standard 24 AWG
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.
Figure 6-7 RDTU Cable Connections
Strata DK I&M 5/99
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
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
DK424 T1
Hardware and Cabling
Transmit
RDTU PCB
Receive
NDTU
Amphenol
Connector (Male)
1670
6-15