Rdtu To Pbx T1 (Separated Less Than 655 Ft.) - Toshiba Strata DK14 Installation And Maintenance Manual

DK424 T1
Applications

RDTU to PBX T1 (Separated Less Than 655 ft.)

If the RDTU is within 655 ft. of the far-end PBX T1 circuit, a CSU is not required. However,
connecting a RDTU T1 span to another PBX or Key/Hybrid T1, in a Tie line configuration at a
distance less than 655 ft. (without a CSU) will require a customer provided special cable. 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. See
"RDTU Cable Installation"
CSUs are not required if the RDTU is less than 655 ft. from the channel bank (see
Two CSUs (customer provided) are required if the RDTU is more than 655 ft. from the customer
premise channel bank (see
In Figures 6-5
Strata DK424
RDTU
T (26)
T1
R1 (2)
T1 (27)
RDTU Amphenol
Connector
(Pin No.)
Figure 6-5 Required Cables/Connectors for RDTU Connection at Distances of Less than 655 (200 Meters)
Strata DK424
TOSHIBA
NDTU Cable
30 ft. max.
RDTU
Figure 6-6 RDTU Connection via CSU and Channel Bank
6-12
on Page
Figure
and 6-6, special cable and connectors are customer-provided.
Customer-provided Special
Cable/Connectors
R (1)
RDTU
Transmit
RDTU
Receive
Cable A
CSU
E&M
Tie Lines
More than 655 ft.
6-14.
6-6).
(Maximum 655 ft.)
Cable B
CSU
Figure 6-5).
PBX or other CPE
(2) Rr
PBX/Key
(27) Rt
System
or...
Channel
(1) Tr
Bank
(26) Tt
PBX Amphenol
Connector
Analog PBX
or...
Key System
Analog
Channel
Tie Line
Bank
Strata DK I&M
1667
1668
5/99