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DTI installation
553-2811-200
Standard 6.0
December 1994
Cable requirements
Shielded 22 AWG (0.644 mm) cable is recommended for connecting the DTI
to the cross-connect point (or a CPI to CPI connection). This cable consists
of two shielded twisted-pair conductors and two shields.
The transmit and receive pairs must be individually shielded and enclosed in
a polyvinyl jacket. This type of cable is commonly referred to as
“6-conductor” cable. T1 cable shielding should be grounded at the
cross-connect point.
To install a private T1 transmission cable, consult the Northern Telecom
Transmission Division. To manufacture cables of different lengths than the
standard cables provided, see
“Wire list” on page 57
.
of cable used and the lengths required for internal and external DTI
connections.
Table 6
DTI cables and cable lengths
Cable type
From
To
Maximum
length (feet)
Maximum
length (meters)
QCAD130
NT8D79xx
QPC472
QPC720
QPC471
QPC775
(CC-0)
10
3.04
QCAD130
NT8D79xx
QPC472
QPC720
QPC471
QPC775
(CC-1)
10
3.04
QCAD124
NT8D85xx
QPC472
QPC720
QPC414
Network
45
13.71
QCAD128
NT8D83xx
QPC472
QPC720
Bulkhead
I/O panels
25
7.62
RS-232
NT8D89Ax
QPC472
QPC720
Echo Canceller
50
15.25
22AWG Echo
Canceller
DSX-1
655
199.64
NT8D97xx
I/O panel
T1 I/O
50
15.25
