Toshiba CTX28 用户手册
T1
RDTU1 & 2 - T1 Interface Unit
8-18
Strata CTX I&M 06/04
RDTU1 and 2 Cable Installation
The RDTU PCB is shipped with a Toshiba cable for connecting the RDTU PCB to a CSU. The
30 ft. cable is specially made to conform with EIA specifications (see
30 ft. cable is specially made to conform with EIA specifications (see
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
must conform with EIA specification, see the Notes of
. Almost all CSU manufacturers
supply cables that comply with T1 span specifications for connecting the CSU to customer
premise equipment (like Strata CTX, RDTU) to the Network Interface equipment.
premise equipment (like Strata CTX, RDTU) to the Network Interface equipment.
Figure 8-8
RDTU Cable Connections
Notes
•
Pins 2 and 4 of the DB-15 connector in most CSUs are frame ground. No connection is
required.
required.
•
NDTU cable is supplied with RDTU PCB (30 ft. maximum).
•
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.
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.
1670
RDTU PCB
(26)
(1)
(27)
(2)
T
R
T1
R1
Black
Red
White
Green
Customer-supplied Cable (See Notes)
RDTU To Customer Premise Equipment (CPE) T1
RDTU Amphenol
CPE T1 (PBX
or Key
System) or
Channel Bank
or Key
System) or
Channel Bank
655 Feet Maximum
Transmit
Receive
(4) T
(5) R
(1) T1
(2) R1
Network
Interface Unit
USOC-RJ48C
or RJ48X
Interface Unit
USOC-RJ48C
or RJ48X
8-Pin Modular
(RJ45 Type Jack)
(RJ45 Type Jack)
NDTU DB-15
Connector (Male)
Connector (Male)
DB-15
Connector (Female)
Connector (Female)
Customer Supplied
Cable (See Notes)
Cable (See Notes)
RDTU To Network or Long Distance T1 Provider
NDTU
Amphenol
Connector (Male)
Amphenol
Connector (Male)
(1)
(9)
(3)
(11)
Customer-
supplied
CSU
supplied
CSU
RDTU PCB
(26)
(1)
(27)
(2)
T
R
T1
R1
Black
Red
White
Green
(1)
(9)
(3)
(11)
NDTU Cable (30 ft. Maximum)
Transmit
Receive