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indicator for voice mail didn't work on the analogy phones of IAD132

Publication Date:  2013-07-31 Views:  81 Downloads:  0
Issue Description
Indicator for voice mail didn't work on the analogy phones of IAD132. It blinks some times and then keep off.
Alarm Information
Handling Process
first we check the VMWI type by command "display sip soft-parameter " and found the
     vmwi_type                   : fsk

Then we try to change it to another type by command "sip soft-parameter vmwi_type reverse " and then try again.

After change it to reverse, the indicator works normally, Problem solved.
Root Cause
there are 2 tpyes of VMWI (that is, the indicator turns on after receiving a SIP message) mode: reverse & fsk.

we need to confirm is the type of VMWI is right.

if neither reverse nor fsk doesn't work, we need to make log trace and record to analysis.
for problem of Voice Mail Indicator, first need to make clear what is the right VMWI type of the analogy phone.