No subject

{code}
; Power level difference between frequencies for different Administrations/RPOAs
;               Power Gain              equiv
;               normal  reverse         dB's
; AT&T(default) 6.31    2.51            8dB(normal), 4dB(reverse)
; NTT           3.16    3.16            Max. 5dB
; Danish        3.98    3.98            Max. 6dB
; Australian    10.0    10.0            Max. 10dB
; Brazilian     7.94    7.94            Max. 9dB
; ETSI          3.98    3.98            Max. 6dB
{code}

Looks like your setting required the Brazilian levels, which are 9dB for normal and reverse twist.

The draw back, is if the reverse twist limit is too high, like 20.0 (or 100dB) as I first suggested, you run the risk of speech being detected as DTMF - this is referred to as 'talk off'.

With the default reverse twist of 2.51 (or 4dB), digits may be missed where line conditions do not meet AT&T specifications.

But as you have now closed the reverse twist limit to 7.98 (or ~9dB), I don't think you'll have the 'talk off' issues.

Alec


                
> Asterisk system didn't accept some dtmf digits when It called by a external PBX phone
> -------------------------------------------------------------------------------------
>
>                 Key: ASTERISK-20748
>                 URL: https://issues.asterisk.org/jira/browse/ASTERISK-20748
>             Project: Asterisk
>          Issue Type: Bug
>      Security Level: None
>          Components: Core/General
>    Affects Versions: 1.8.18.0, 10.10.0
>         Environment: CentOS Linux, Asterisk 1.8.18.0, libPri 1.4-current, DAHDI 2.6
> Card Details : Single span digital telephony card TE121. and using PRI E1 lines 
>            Reporter: Ankit Mittal
>            Assignee: Ankit Mittal
>         Attachments: debug.txt, dsp.conf, fsReceive1.wav, fsTransmit1.wav
>
>
> When some one call on our DAHDI(asterisk) system by their landline phone or the mobile phone the call goes perfectly and asterisk accept each of the dtmf digit pressed at other end.
> but when the same call is done by their PBX phone, the system ignore some digits like when we press 100136972 it shows 100192, and if we do it again it shows 1001392.
> I have tried 
> 1. relaxdtmf = yes /no
> 2. toneduration = 300
> but nothing help me.

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