[asterisk-users] SendDTMF() behaves strangely

[Stephen Bosch]

Stephen Bosch wrote:
> Moises Silva wrote:
>> try enabling DTMF debugging on logger.conf for the console, and tell
>> us here waht do you see
> 
> This is what comes out on the console, with IP addresses removed:
> 
> 
>>     -- Call accepted by xx.xx.xx.xx (format ulaw)
>>     -- Format for call is ulaw
>>     -- IAX2/[provider_channel_id] is making progress passing it to SIP/polycom-081827b0
>>     -- IAX2/[provider_channel_id] answered SIP/polycom-081827b0
>>     -- Executing Wait("IAX2/[provider_channel_id]", "0.5") in new stack
>>     -- Executing SendDTMF("IAX2/[provider_channel_id]", "4") in new stack
>> Nov  4 11:21:34 DTMF[17046]: channel.c:2345 ast_write: IAX2/[provider_channel_id] : 4
>>     -- Executing SendDTMF("IAX2/[provider_channel_id]", "6") in new stack
>> Nov  4 11:21:34 DTMF[17046]: channel.c:2345 ast_write: IAX2/[provider_channel_id] : 6
>>     -- Executing SendDTMF("IAX2/[provider_channel_id]", "1") in new stack
>> Nov  4 11:21:34 DTMF[17046]: channel.c:2345 ast_write: IAX2/[provider_channel_id] : 1
>>     -- Executing SendDTMF("IAX2/[provider_channel_id]", "3") in new stack
>> Nov  4 11:21:35 DTMF[17046]: channel.c:2345 ast_write: IAX2/[provider_channel_id] : 3
>>     -- Executing Set("IAX2/[provider_channel_id]", "MACRO_RESULT=CONTINUE") in new stack
>>     -- Hungup 'IAX2/[provider_channel_id]'
>>     -- Executing Hangup("SIP/polycom-081827b0", "") in new stack
>>   == Spawn extension (internal, 123, 4) exited non-zero on 'SIP/polycom-081827b0'

If I change the macro section to read like so:

> [macro-page]
> exten => s,1,Wait(1)
> exten => s,n,SendDTMF(2)
> exten => s,n,Wait(10)
> exten => s,n,SendDTMF(6)
> exten => s,n,Wait(10)
> exten => s,n,Set(MACRO_RESULT=CONTINUE)

the called party hears the '2' for about 1.5 seconds, followed by a 10
second pause, followed by the '6' for three seconds.

This is highly unexpected and unspecified behaviour. What's wrong here?

-Stephen-