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Beginner

FXO Ports being seized - Cisco CME

I have a client with a very simple setup. Below is the hardware configuration of CME -

NAME: "CISCO2921/K9 chassis", DESCR: "CISCO2921/K9 chassis"

PID: CISCO2921/K9      , VID: V06 , SN: FGL16111253

NAME: "2nd generation four port FXO voice interface daughtercard on Slot 0 SubSlot 0", DESCR: "2nd generation four port FXO voice interface daughtercard"

PID: VIC2-4FXO         , VID: V04 , SN: FOC15363D0U

NAME: "PVDM3 DSP DIMM with 32 Channels on Slot 0 SubSlot 4", DESCR: "PVDM3 DSP DIMM with 32 Channels"

PID: PVDM3-32          , VID: V01 , SN: FOC155123EJ

NAME: "Internal Services Module with Services Ready Engine on Slot 0", DESCR: "Internal Services Module with Services Ready Engine"

PID: ISM-SRE-300-K9    , VID: V02 , SN: FOC16060AHW

When a call comes in through one of the FXO Ports and go out from the next available FXO port, sometimes both FXO Ports stuck in OFF-HOOK State. At some stage, none of the FXO Port is available for Inbound or Outbound Calls.

Upon further investigation, I found that voice-card needs to be configured not to use local-bypass. No pre-requisite for this.

Configuration is as follows -

voice-card 0

dspfarm

dsp services dspfarm

no local-bypass

!

!

!

voice service voip

allow-connections h323 to h323

allow-connections h323 to sip

allow-connections sip to sip

fax protocol pass-through g711ulaw

h323

!

voice class custom-cptone AU-Tone

dualtone disconnect

  frequency 425

  cadence 375 375

!

voice-port 0/0/0

trunk-group 4-FXO-Ports

translation-profile outgoing OutgoingCall

supervisory disconnect dualtone mid-call

supervisory custom-cptone AU-Tone

no battery-reversal

cptone AU

timeouts call-disconnect 5

timeouts wait-release 5

timing hookflash-out 500

connection plar opx 101

impedance complex1

description pots-offnet gateway

caller-id enable type 1

!

voice-port 0/0/1

trunk-group 4-FXO-Ports

supervisory disconnect dualtone mid-call

supervisory custom-cptone AU-Tone

no battery-reversal

cptone AU

timeouts call-disconnect 5

timeouts wait-release 5

timing hookflash-out 500

connection plar opx 101

impedance complex1

description pots-offnet gateway

caller-id enable type 1

!

voice-port 0/0/2

trunk-group 4-FXO-Ports

translation-profile outgoing OutgoingCall

supervisory disconnect dualtone mid-call

supervisory custom-cptone AU-Tone

no battery-reversal

cptone AU

timeouts call-disconnect 5

timeouts wait-release 5

timing hookflash-out 500

connection plar opx 101

impedance complex1

description pots-offnet gateway

caller-id enable type 1

!

voice-port 0/0/3

trunk-group 4-FXO-Ports

translation-profile outgoing OutgoingCall

supervisory disconnect dualtone mid-call

supervisory custom-cptone AU-Tone

no battery-reversal

cptone AU

timeouts call-disconnect 5

timeouts wait-release 5

timing hookflash-out 500

connection plar opx 101

impedance complex1

description pots-offnet gateway

caller-id enable type 1

!

!

Please note that this is a working configuration. I matched every single parameter with Australian Service Provider. No more issue with the FXO Ports being seized.

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