[cisco-voip] FXO Call Drop problem

[Mohamed Farouk]

Hello all

I am wondering of any one faced the following problem, I have a 3900 router
with CME 7.1 , 8 FXO ports connecting to PSTN , 4 for incoming calls and 4
ports for outgoing PSTN calls.
when ever the users dials towards PSTN from ( Cisco IP phones 7914 series )
the call drops after 14 seconds, when they try again it works fine, incoming
calls from PSTN has no problems.

Here is my current configuration :


trunk group Cairo_PSTN
 max-calls voice 8
 hunt-scheme sequential both up
!
!
!
voice-card 0
!
!
voice call send-alert
no 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 sip
 fax protocol t38 ls-redundancy 0 hs-redundancy 0 fallback none
 h323
!
voice class codec 101
 codec preference 1 g711ulaw
 codec preference 2 g729r8
!


voice class custom-cptone Egypt
 dualtone disconnect
  frequency 450
  cadence continuous 250


voice-port 0/2/0
 supervisory disconnect dualtone mid-call
 supervisory custom-cptone Egypt
 cptone EG
 timeouts wait-release 15
 connection plar opx 5830
 impedance complex5

 caller-id enable
!
voice-port 0/2/1
 trunk-group Cairo_PSTN
 supervisory disconnect dualtone mid-call
 supervisory custom-cptone Egypt
 cptone EG
 timeouts wait-release 15
 connection plar opx 5818
 impedance complex5

 caller-id enable
!
voice-port 0/2/2
 trunk-group Cairo_PSTN
 supervisory disconnect dualtone mid-call
 supervisory custom-cptone Egypt
 cptone EG
 timeouts wait-release 15
 connection plar opx 5818
 impedance complex5
 caller-id enable
!
voice-port 0/2/3
 trunk-group Cairo_PSTN
 supervisory disconnect dualtone mid-call
 supervisory custom-cptone Egypt
 cptone EG
 timeouts wait-release 15
 connection plar opx 5818
 impedance complex5
 caller-id enable
!
voice-port 0/3/0
 trunk-group Cairo_PSTN
 supervisory disconnect dualtone mid-call
 supervisory custom-cptone Egypt
 cptone EG
 timeouts wait-release 15
 connection plar opx 5818
 impedance complex5
 caller-id enable
!
voice-port 0/3/1
 trunk-group Cairo_PSTN
 supervisory disconnect dualtone mid-call
 supervisory custom-cptone Egypt
 cptone EG
 timeouts wait-release 15
 connection plar opx 5818
 impedance complex5
 caller-id enable
!
voice-port 0/3/2
 trunk-group Cairo_PSTN
 supervisory disconnect dualtone mid-call
 supervisory custom-cptone Egypt
 cptone EG
 timeouts wait-release 15
 connection plar opx 5818
 impedance complex5
 caller-id enable
!
voice-port 0/3/3
 trunk-group Cairo_PSTN
 supervisory disconnect dualtone mid-call
 supervisory custom-cptone Egypt
 cptone EG
 timeouts wait-release 15
 connection plar opx 5818
 impedance complex5
 caller-id enable
!
!

Please advise if any one have had this problem before

-- 
Hawk
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