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EchoLife HG8110H-ONTs does not work with some old phones what working with pulses

Publication Date:  2016-05-16 Views:  75 Downloads:  0
Issue Description
customer report a issue that they have product EchoLife HG8110H-ONTs does not work with some old phones what working with pulses(those phones does not support tones-dtmf), the Product is ONT HG8110 and  it is a problem in ONT not in OLT.
Alarm Information

can't work with pulses (the old phone don't support tones-dtmf)

Handling Process
ONT can't recognize the pulse most of time is because the difference of interval and up limit of the pulse, so we try to  modify 2 parameter and test.
we give the solution like below :
Please modify the vas profile like below and test :
1.modify “Pulse Dial Make Lower limit ” to 20ms. Then do the test.
2.if after step 1 also has problem , please modify “Pulse Dial Break Lower limit”to 20 and then test . Pleasejust used this VAS profile in the ONT which connect to the old Phones. 

after customer test ,solution success, 

Root Cause

ONT can't recognize the pulse most of time is because the difference of interval and up limit of the pulse

Solution
modify “Pulse Dial Make Lower limit ” to 20ms. Then it work.
Suggestions

different country have different stardard of  phone, we need to find the startard of that contry and modify it to match.

END