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New Member

FXO issue

I have a customer who has a 2811 with two 4-port FXO modules. Some of these ports aren't disconnecting when you end a call. If you do a "show voice call summary" after you have disconnected the call, the voice port is still showing FXOLS_CONNECT under VPM state. Any ideas?

Below is the config for one of the voice ports that is having this issue:

trunk-group FXO

input gain -3

no comfort-noise

timeout interdigit 2

connection plar 34000

station-id number 34000

caller-id enable type 1



New Member

Re: FXO issue

An update:

The call does finally disconnect after several minutes.




Re: FXO issue

Have posted a few times with my experience with this. my scenario was that calls would disconnect with time ranging from 13 secs to sometimes never.

had to create a voice class with tones specific values : cadence busy etc and also ask the provider to put the lines into a trunk group. purpose of this is to enable COD on their side.

this is what it looks like

voice class dualtone-detect-params 100

freq-max-deviation 50

freq-min-power 35


voice class custom-cptone TEST

dualtone busy

dualtone ringback

frequency 500 632

dualtone reorder

frequency 500 631

cadence 500 500

dualtone disconnect

frequency 630

cadence 500 500

and on the voice port

voice-port 0/0/0

supervisory disconnect dualtone mid-call

supervisory custom-cptone TEST

supervisory dualtone-detect-params 100

no battery-reversal

timeouts initial 4

timeouts interdigit 2

timeouts call-disconnect 0

connection plar 139

your values will probably not be the same. Also this by itself didnt work for me, i had to apply this as well as ensure the lines were in a trunk group with COD enabled.

P.S converting lines to Ground Start is also another solution.

New Member

Re: FXO issue


try connection plar-opx xxxxx

New Member

Re: FXO issue

From what I understand, the connection plar-opx command cannot have a wildcard inserted, right? If that is the case, we can only reach one number only with connection plar-opx?

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