Outbound call busy tone

[kevin.hu]

Hi Cisco VoIP experts,

My user called me and told me that he can't make any outbound call.  When I login to the voice gateway (ISR 2811), I noticed the PRI was bouncing couple times 30 minutes ago according to show syslog.  Show isdn status and show ccm-manager all shows normal status.  After resetting the gateway from CallManager 4.3, I am able to make outbound call again.

The customer asks if it can be avoided in the future and if there is a tool that can proactively notify IT about unable to make inbound or outbound call.  I am thinking some kind of PRI probe or robo calls but I don't know exactly what.

Thanks.

[Jonathan Schulenberg]

There are a several options; here are the three that come to mind:

• A syslog server.
• SNMP monitoring of the controller or serial interface on the router.
• RTMT alert emails. In this case it sounds like you're using MGCP so the MgcpDChannelOutOfService alarm probably would have been thrown.

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[kevin.hu]

Thanks for the response Jonathan.  Do you have experience with Cisco Prime?  I saw Cisco Prime can do synthetic call from phone to phone.  Because a syslog or SNMP monitorings are not proactive troubleshooing tools.  They wait for some event to happen and then alert you about the status.  I am looking for a more proactive tools to periodically probing the line to make sure it is working.