Installation
68P81096E37-N
41
06/28/05
System Type vs. Wireline Circuit
Table 11 shows which of the four (4) wireline circuits to use for various sys-
tem types.
Stations equipped with a 4–wire Wireline Interface can support a single 4–
wire or a single 2–wire telephone line connection.
Stations equipped with an 8–wire Wireline Interface can for example sup-
port a two 4–wire or a single 2–wire telephone line connection.
i)
For 4–wire systems, Line 1 is transmit audio (landline to station),
and Line 2 is receive audio (station to landline). For 2–wire systems,
Line 2 is transmit and receive audio.
ii)
A CPI is a Console Priority Interface.; used in Trunking systems.
A CIT is a Central Interconnect Terminal; used in Trunking systems.
iii)
Transmit audio with respect to consoles, comparators, CIT, and
DVM modems are outputs.
Transmit audio with respect to stations is an input.
iv)
Receive audio with respect to consoles, comparators, CIT, and DVM
modems are inputs.
Receive audio with respect to stations is an output.
Note
Table 11. System Types vs. Wireline Circuit Matrix
System Type
Line 1
(Note i)
Line 2
(Note i)
Line 3
Line 4
Conventional Local Area Analog
Console
Console
Not used
Not used
Conventional Wide Area Analog
Comparator or
Console
Comparator
Not used
Not used
Trunked Local Area Clear, without CPI
CIT
CIT
Not used
Not used
Trunked Local Area Clear, with CPI
Console
Console
CIT
CIT
Trunked Wide Area Clear without CPI
Comparator
Comparator
Not used
Not used
Trunked Wide Area Clear, with CPI
Console
Console
Comparator
Comparator
Trunked AMSS Clear
Comparator
Comparator
Not used
Not used
Redundant Trunking Clear, Wide Area
without CPI
Comparator
Comparator
Not used
Not used
Note
