[Asterisk-Users] Disabled echo canceller because of tone (rx)

[Moshe Yudkowsky]

At 10:04 2003-06-13 -0600, you wrote:
>But we get this message all the time though on normal voice calls and it's
>not because we're calling fax machines or modems.

The tone is put in by long-distance voice network echo cancellers -- calls 
over 400 miles IIRC. This prevents multiple ECs from trying to echo-cancel 
the conversations.

So it's not just a fax/modem tone. It's a Bell-standard telephone-network 
EC tone.

-- 
  Moshe Yudkowsky
  Disaggregate
  2952 W Fargo
  Chicago, IL 60645 USA

  <http://www.Disaggregate.com>