Carrier Voicemail

Unanswered Question
Dec 26th, 2007

We use 2811 routers with FXO cards. On occasion we need to take a local 1Fb into the FXO port and assign it directly to a station using ATT. DN. in Call Manager The problem with this is that once one caller has called this line the next caller gets a busy. We ordered Qwest VM on the line to fix this and on a busy scenario in works fine however it will not roll to Qwest VM no a no answer scenario. Qwest blames the router and I was skeptical at first until we turned the FXO port off and the call rolls to qwest VM fine. What could the router be doing to a ringing line that would stop the local carrier from recognizing a no answer? Is there something we can set in the router to stop this?

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Paolo Bevilacqua Wed, 12/26/2007 - 15:15

Hi,


the "next caller gets a busy" is is a classical disconnect supervision (lack of) issue. Please read the following to understand what is going on, and how to fix it.


http://cisco.com/en/US/tech/tk652/tk653/technologies_tech_note09186a00800ae2d1.shtml


The lack of "roll to VM" on no answer is probably related to the above, but would require more investigation.


Hope this helps,please rate post if it does!

sysjes Fri, 12/28/2007 - 13:27

Tony, MGCP gateways will seize the call. To work around that here's what you'll need to do:

1. Add connection plar-opx to the voice-port

2. Add dial-peer voip XXXX (*you'll also need to create dial-peers for the other call managers for failover)

a. Destination-pattern

b. Session target ipv4:{ip address of CCM2} (*)

3. Add h323 gateway for the router.


The h323 configs should override the MGCP configs. If not, you'll need to remove the port from the mgcp gateway.



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