User manual

IVC Card Features and Support
Chapter 10
Diagnostic Testing
An IVC card can, with the proper configuration, perform diagnostic tests. In this way,
an IVC card can replace a Diagnostic Test Interface (DTI) card. An IVC card contains a
DTI circuit that supports many, but not all, diagnostic tests. For example, an IVC card
does not support Trunk Gain tests or other tests that require the test bus. See "Diagnostic
Tests Supported by IVC" for descriptions of the supported tests. For more information,
including procedures to run the tests, see the PointSpan System Diagnostics manual
(2499-nnn).
To enable the system to use the DTI circuit on an IVC card, follow the procedure in
"Configure an IVC Card to Support Diagnostic Testing."
Diagnostic Tests Supported by IVC
The following table describes the diagnostic tests available through an IVC card.
Diagnostic Test Description
ITE Device Loopback test Verifies the connections between integrated
telephony equipment (ITE) cards and ITE phones.
This test measures the signal level and frequency
of each connection.
STE Loopback test Verifies the connections between station terminal
equipment (STE) cards and STE phones.
Trunk Milliwatt test Measures the signal level and frequency of milliwatt
connections between cards in an Aastra switch and
associated trunks.
Trunk Silence and Echo Return
Loss test
Measures the silence level, silence return loss
(SRL), echo return loss (ERL), and SRH tones of
silent termination connections between cards in an
Aastra switch and associated trunks.
ITE Gate Array Loopback test Verifies the operations of gate array circuits on
ITE cards.
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