IOS (tm) C2950 Software (C2950-I6K2L2Q4-M), Version 12.1(22)EA9, RELEASE SOFTWARE (fc1)
suddenly my phone stopped working for DTMF tone, i mean when i dial a conference bridge lets say 6565 and then it ask for conference bridge code lets say 12345, it doesnt recognize the code and says code is invalid, SIP Proxy is Asterisk in this case.
Currently my cisco switch port is configured for dual data + voice vlan, where DTMF dont work, sample config below
switch mode access
switch port voice vlan 2/// for voice
switch port access vlan 5/// for PC
When i change it to simple access port, DTMF starts working,
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