CME with FXO

Unanswered Question
Jun 6th, 2008

I have a 2801 router with cme and a four ports FXO card, I have a 800 toll free with three lines, any idea on how to configure this type of service?

Is just one telephone number asocciate with 3 physical lines on three port int he cisco fxo card.

I have this problem too.
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Overall Rating: 4.7 (3 ratings)
Paolo Bevilacqua Fri, 06/06/2008 - 08:45

Under the voice port, configure "connection plar opx XXX" where XXX is the pilot number of the queue service. Queue is configure with "bacd-aa", if you think you don;t need queues, you can configure the pilot for the ephone-hunt directly.

Hope this helps, please rate post if it does!

Alejandro Corte... Fri, 06/06/2008 - 09:19

When I call the 800 toll free number thr rings ring goog, the second time ring good, until the three becouse it has 3 lines, but everytime that I finish the call the line stay connect status in the router, until I do a Shut then No shut in the interface.

any idea? I udgrade to the ios version Version 12.4(15)T5

another question FXO just work in analog phone lines? or digital lines?

Paolo Bevilacqua Fri, 06/06/2008 - 09:30

Hi, are you sure the port doesn't go "dorm" after few seconds ? Anyway, expecially when using b-acd/AA you will need to configure disconnect supervision:

The FXO port can be used exclusively with analog pots lines.

If you was to use ISDN BRI instead, you would never have the disconnect problem.

Alejandro Corte... Fri, 06/06/2008 - 11:15

Yes, this function is configure I make test with all the options in the web page but continues working worng:

Voice card specific Info Follows:

Signal Type is loopStart

Battery-Reversal is enabled

Number Of Rings is set to 1

Supervisory Disconnect is signal

Answer Supervision is inactive

Hook Status is Off Hook

Ring Detect Status is inactive

Ring Ground Status is inactive

Tip Ground Status is inactive

Dial Out Type is dtmf

Digit Duration Timing is set to 1

Paolo Bevilacqua Fri, 06/06/2008 - 12:48

Hi, that is very strange, if you answer the call then hang up the IP phone, the voice port must also disconnect and be ready to take a new call in few seconds. Send output of "show voice-port x/y/x' after you're done talking and have hang up on the IP phone.

Paolo Bevilacqua Fri, 06/06/2008 - 13:52

Ok, I assume that this happens with the IVR application you mentioned in the other thread, because it's impossible to happen for a normal call to phone, once hang up the IP side, voice-port must go dormant.

Paolo Bevilacqua Fri, 06/06/2008 - 16:23

When using IVR, if you don't have disconnect supervision working, the port will remain up if the caller hangs up before connecting to a party.

It will remain so until IVR times out or call goes to an operator that will hear disconnect tone.

Alejandro Corte... Fri, 06/06/2008 - 23:13

But in this case the disconnect supervision is working and there is a time out (param aa-htimeout 10) in the IVR.

Paolo Bevilacqua Sat, 06/07/2008 - 03:57

I understand, so you would need to take some debugs (vpm signal) to see what is going on.

Note if you use b-acd/aa, you don;t need "opx" on the lines, because the call is always answered (exception when using silent drop-trough mode).

You can also try IOS 12.4(11)XJ4 that is know to have less bugs than others.

Alejandro Corte... Mon, 06/09/2008 - 06:25

The problem is fixed the solution:

In the voice port use tiem outs like this:

timeouts call-disconnect 0

timeouts wait-release 1

timing hookflash-out 500

connection plar opx 3002

Razeen Abdulla Wed, 11/19/2014 - 12:23

Dear All,

I solved the issue.

I am from Saudi Arabia. I use STC analog lines at my office. And this command under my voice port worked like a charm. Hope it helps


voice-port 1/0/0
groundstart auto-tip
cptone GB
timing sup-disconnect 85
connection plar opx 5999  ==> your AA pilot number
impedance complex5
caller-id enable
supervisory disconnect anytone
no battery-reversal
caller-id alerting line-reversal
caller-id alerting dsp-pre-allocate


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