Cisco 2911 vesio 12,4 , i have some noise when i make call

Question

hi
1: i have cisco  2911 with 2 card 4FXO i can make the call buth i heath some pertubation in the conversation
2 : i can heat th ring when i make a external call
this my configuration
voice call carrier capacity active
voice rtp send-recv
voice service voip
allow-connections h323 to h323
allow-connections h323 to sip
allow-connections sip to h323
allow-connections sip to sip
supplementary-service h450.12
fax protocol cisco
h323
  no call service stop
voice class codec 1
codec preference 1 g711ulaw
codec preference 2 g729r8
voice class h323 1
  h225 timeout tcp establish 3
voice-port 0/0/0
supervisory disconnect anytone
cptone FR
connection plar opx 0
caller-id enable
voice-port 0/0/1
supervisory disconnect anytone
no battery-reversal
input gain -3
output attenuation 4
echo-cancel coverage 24
no comfort-noise
cptone FR
timeouts interdigit 6
timeouts call-disconnect 5
timing hookflash-out 500
connection plar opx 0
impedance complex2
caller-id enable
best regard!

Answer 1

Try this:
1 - Use the default configuration for the port. Fw:
voice-port 0/0/0
supervisory disconnect anytone
cptone FR
connection plar opx 0
caller-id enable
voice-port 0/0/1
supervisory disconnect anytone
cptone FR
connection plar opx 0
caller-id enable
2 - Do you hear noise in both ports?
3 - Usually in the case of noise, the problem is not in the router of the beholder. Often the problem is the user of the remote end. The Other End. (Ask for verification on the other side too)
4 - Check the qos is never enough.
I hope I have helped.
Luciane de Medeiros