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SX-200 ICP MX Technician’s Handbook
Measuring LS Trunks
The LS Measurement tool in Maintenance is used to test LS trunks before
putting them into service. The test results determine the settings to
program for optimum audio quality.
Table 34: LS Measurement Tool Tests
Test Purpose
Line Quality Measures the loss level and impulse response of the
trunk and recommends Length and Impedance
settings to program in Form 13 (Audio Configuration
Table subform). If Length and Impedance are set to
AUTO in Form 13, the recommended settings are
programmed automatically when the test is run.
The test results are posted to the maintenance logs,
and e-mailed to the address specified in Form 52
(Email).
Line Length Settings: Short, Long, and Extra Long.
The Extra Long setting is only valid with AMB/AOB
LS trunks. It provides additional gain for signals
transmitted from the CO to the ICP but not for signals
transmitted from the ICP to the CO.
Impedance Settings: 600 Ohm, Complex, DSL, and
Impedance A, B, C, and D.
Impedance A can be used to match the controller to
LS lines that have loading coils. Impedance B, C, and
D are the same as 600 Ohm.
Distortion Measures distortion on the line using an external silence
(balance) termination number. Run this test only when
instructed to do so by Mitel Product Support.
Echo
Measures the echo characteristics of the line using an
external silence (balance) termination number. Run this test
only when instructed to do so by Mitel Product Support.