[Asterisk-Users] Choppy Ringing

[Todd Weiser]

Hello All,

 

We recently changed our asterisk system to begin using G.729a as the
primary codec.  We have a Cisco 1700-series router which connects to the
PSTN via FXO ports, along with Cisco 7940 SIP phones.  Everything is
working great, except...  When an inbound caller calls into our system,
they hear an IVR.  When the caller dials an ext (SIP phone), the ringing
progress tone is choppy/distorted...  However, the voice call itself
sounds fine.  Asterisk, the Cisco phone, and the call gateway are all
configured to use rfc2833.  From my research, asterisk generates
progress tones out-of-band (I think) unless turned on.  We don't have
any problems with the progress tones when G.711u is used.  Any
help/ideas would be greatly appreciated.

 

Todd

 

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