Toshiba Strata AirLink DK40i, Руководство по установке и обслуживанию

Страница: 333 / 724

T1
Hardware and Cabling
Strata DK I&M 6/00
8-11
T1
In Figures 8-5 and 8-6 , special cable and connectors are customer-provided.
Figure 8-5 Required Cables/Connectors for RDTU Connection at Distances of Less than 655 (200 Meters)
Figure 8-6 RDTU Connection via CSU and Channel Bank
Hardware and Cabling
RDTU Cable Length Switch
The distance between the DK, RDTU and CSU or RDTU to other Customer Premise Equipment
(CPE) T1 may vary (0~655 ft.) as shown. (See
Figures 8-4, 8-5 , and 8-6 .) The RDTU interface
transmitter must be equalized and its impedance must be matched to the cable length connecting
the RDTU to the CSU or other CPE, T1.
RDTU transmit equalization/ impedance matching is accomplished by setting RDTU SW1 for the
proper cable length (see
Figure 8-5 for SW1 location and “SW1 Equalizer Switch and Loop Back
Jumpers (Internal Option)” on Page 8-2 for SW1 setting instruction).
RDTU Loop Back Jumper Plugs
The RDTU PCB provides jumper plugs for loop back testing. Loop back tests are described in
“Loop Back Testing” on Page 8-14 .
R (1)
T (26)
R1 (2)
T1 (27)
(2) Rr
(27) Rt
(1) Tr
(26) Tt
(Maximum 655 ft.)
Strata DK
PBX or other CPE
PBX/Key
System
or...
Channel
Bank
RDTU Amphenol
Connector
(Pin No.)
RDTU
T1
Customer-provided Special
Cable/Connectors
RDTU
Transmit
RDTU
Receive
PBX Amphenol
Connector
1667
E&M
Tie Lines
Analog PBX
or...
Key System
RDTU
Strata DK
More than 655 ft.
Channel
Bank
CSU CSU
TOSHIBA
NDTU Cable
30 ft. max.
Analog
Tie Line
Cable B Cable A
1668