LSA-P
LUS
C
ONNECTIVITY
1
01/02/00 Hollands FMS1 Page 1
1. KRONE C
OMPONENTS IN THE
L
OCAL
L
OOP
KRONE LSA-PLUS connection systems can be used throughout the Local Loop, in Main Distribution Frames, Cross-
Connection Cabinets, Distribution Points and In-house areas.
Main Distribution Frame (MDF)
Exchange
Cross-Connection Cabinet
Distribution Point (DP)
Local Exchange
Socket
Subscriber
System side
Line side
LSA-P
LUS
C
ONNECTIVITY
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01/02/00 Hollands FMS1 Page 2
2. G
ENERAL

Series 2 max. 2
4 )
4 )
2 wires only with diameters 0,35 to 0,65 mm
LSA-P
LUS
C
ONNECTIVITY
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01/02/00 Hollands FMS1 Page 3
3. C
ONNECTION
T
ECHNIQUES
Splice - Wire wrap - LSA-PLUS System
3.1. Conventional mechanical connections
Twisted and Soldered
Twisted and Sleeved
Wrapped around Post
(Normally soldered)
Screw Terminal Wire-wrap
Crimped
Conventional connection techniques require the wire to be cut to length and the insulation removed before the wire can be
connected. The wires are then twisted together, soldered, screwed or wrapped to finalize the connection.
Conventional mechanical connections are subject to the following stresses:
Type of stress on the
connections →

↓ Connection method
Wire breakage Dry joint High resistance

wire insulation and certain components.
Each joint is relatively large, as it requires a number of
wire wraps.
There is less risk of high-resistance connections as a
good mechanical joint is implicit in the technique.
The technique is more suitable for joints of a permanent
or semi-permanent nature, as the wire tends to break
on repeat jointing.
The jointing operation is relatively simple. Especially sharp tags are desirable to enable the wire to
bite into sharp edges.
The joint requires tinning. The technique is not satisfactory with stranded
conductors.
There are no solder splashes. Difficulties arise when jointing small diameter wires.
Solder:
Advantages Disadvantages
The joints are smaller as not so many wire wraps are
necessary.
Heat may cause component and insulation damage.
The joint allows repeat jointing. There is a greater risk of high-resistance connections as
good mechanical joints are not so obvious.
The technique permits the use of any type of wire
(stranded, small diameter, etc.).
Jointing requires a relatively complex operation.
The joint requires tinning.
Screw:
Advantages Disadvantages
Universally available Requires correct type and size of screwdriver and wire
entry from the correct direction. Connection relies on
the experience of the technician.
The joint allows repeat jointing. There is a greater risk of high-resistance connections as

Conductor
Metal contact
A correctly terminated IDC connection prevents:
- corrosion,
- loosening due to vibration
- high resistance connections
- movement of the wire
The joint is easily remade, only the small contact area of the wire must be removed. The connection cannot be touched without
the correct insertion tool, which leads to greater contact security and means that when the joint is to be remade no particles of
solder or wire remain in the connection area.
Most important is the connection is repeatable. This means that every time a joint is made the properties of the connection will
be the same. With conventional connection techniques such as wire-wrap, solder and screw terminations the physical
connection relies on the "feel" of the technician. There is no guarantee that successive terminations will all be of the same
quality and have the same electrical properties.
IDC is a reliable, more secure and quicker contact method. This method has been proven to be the most electrically and
mechanically sound method for connecting normal telephony and data cabling.