T1
Applications
6-6
Strata CTX I&M 10/02
NDTU cable) if the other customer premise T1 equipment is more than 655 ft. from the RDTU.
The T1 span on the other end must also connect to a CSU.
Figure 6-4
RDTU Connection to Digital Network or OCC
The RDTU equalization switch (SW1) must be set for “SHORT” cable length because RDTU will
be connected to the CSU with the 30 ft. NDTU cable.
Connecting CSU to CSU and CSU to the far-end PBX T1 is specified by the CSU manufacturer—
see the CSU installation documentation. Toshiba does not supply cables or connectors to connect
CSU to CSU (Cable A) or CSU to the far end PBX (Cable B).
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” on page 6-8
.
CSUs are not required if the RDTU is less than 655 ft. from the channel bank (see
Figure 6-4
).
Two CSUs (customer provided) are required if the RDTU is more than 655 ft. from the customer
premise channel bank (see
Figure 6-6
).
In
Figures 6-4
and
6-6
, special cable and connectors are customer-provided.
Figure 6-5
Required Cables/Connectors for RDTU Connection at Distances of Less than 655 (200 Meters)
Strata CTX
RDTU
CSU
DS-1
Toshiba
NDTU 30 ft Cable
Telco Digital Network or
Common Carrier
(AT&T, MCI, etc.)
Network
Interface
Unit
5802
R (1)
T (26)
R1 (2)
T1 (27)
(2) Rr
(27) Rt
(1) Tr
(26) Tt
(Maximum 655 ft.)
Strata CTX
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
5803
Summary of Contents for Strata CTX100
Page 16: ...Introduction Related Documents Media xii Strata CTX I M 10 02 ...
Page 94: ...Strata CTX100 Installation Installing the CTX100 Cabinet 2 24 Strata CTX I M 10 02 ...
Page 150: ...Strata CTX670 Installation Remote Expansion Cabinet Unit 3 56 Strata CTX I M 10 02 ...
Page 188: ...PCB Installation Network Requirements 4 38 Strata CTX I M 10 02 ...
Page 238: ...T1 Loop Back Testing 6 12 Strata CTX I M 10 02 ...
Page 310: ...Station Apparatus 2000 series Telephones 8 48 Strata CTX I M 10 02 ...
Page 342: ...Peripheral Installation Station Message Detail Recording SMDR 9 32 Strata CTX I M 10 02 ...