Tadiran Telecom FlexSet 280, Manual

Page: 114 / 132

10-4
Coral Terminal Equipment
CP
A In
st
all
ati
on
10
Peripheral Card Connections
For information on pin assignments for all I/O cable connections to the Coral Peripheral Cards,
refer to
Chapter 5, External Connections
in the Installation manual of the relevant Coral system
for the corresponding tables for the appropriate Coral Peripheral Card (8/16SKD, 8/16/24SDT,
8/16/24SFT, 8/16SFTipx, 8/16SFTsl and 8F8Ssl).
.
Line Distances
CPA terminals are designed to operate over line distances (see below) using internal power,
supplied by the Coral station circuit. In order
to extend the cable loop limit , the CPA can be
powered by an external power source connected to the CPA. Power adapters are explained in
External Power Supply on page 8-1
. Maximum Line Lengths depend on the gauge wire used to
connect the Coral to the CPA terminal.
When using the internal power supply (supplied by the peripheral card and powered over the
LAN), a simple rule of thumb for any gauge wire is that the maximum DC resistance of the
loop be
200 Ohms or less .
Maximum line lengths from 8/16SKD, 8/16/24SDT, 8/16/24SFT, 8/16SFTipx, 8/16SFTsl,
8F8Ssl peripheral cards to the CPA are listed in
Table 10-1.
Table 10-1 Maximum Line
Lengths
Lengths are accurate for a maximum line capacitance of 45nF/km.
CPA terminals cannot be used as power failure stations. The CPA will be ruined by incoming ring voltage on
a PF trunk.
GAUGE INTERNAL POWER EXTERNAL POWER
22 AWG
1,600 m 2,200 m
5,250 ft 7,300 ft
24 AWG
1,100 m 1,900 m
3,600 ft 6,250 ft
26 AWG
700 m 1,300 m
2,300 ft 4,300 ft