This test is executed on the following maintenance objects:
For DIG-LINE, and E-DIG-ST, this test is known as the Voice and Control Channel Local Loop Test (#13). This test consists of four tests that check the information and control channels between the server and the port circuit. If any of the tests fail or abort, the test sequence stops and the result is reported.
For M/T-ANL, this test is known as the Analog Port Digital Looparound Test (#13). The test performs a loop test on the data channel and TDM bus, then runs a conference test.
For M/T-DIG, this test is known as the Digital Port Looparound Test (#13). The test performs a loop test on the data channel and TDM bus, then runs a conference test.
For PDMODULE and TDMODULE, this test is known as the Information and Control Channel Looparound Test (#13). This is a set of four tests that check the operation of the information and control channels used between Communication Manager and the Digital Line port circuit.
User impact from problems with this port many range from no noticeable effect to not being able to use this port. Users may not notice a disruption in service. In extreme cases, the conferencing feature may not work at all.
