"Busy" or "Unreachable" on Asterisk

"Busy" or "Unreachable" on Asterisk

On an Asterisk-based VoIP SIP PBX system, the CyberData SIP Device status is "Busy" or "Unreachable". I have set up both the CyberData VoIP SIP device and the PBX extension information for the device. I can see the device on the network, am able to PING it, and can bring up the device web page with a browser. However, when I try to call it from a phone extension, I see the word "Busy" or "Unreachable" in the Asterisk log.

In the PBX setup page for the extension of the CyberData device, find the Qualify = value and change it to NO. If the Qualify = value requires a numeric value, then change it to 0.

Note that on some Asterisk systems (such as Intuitive Voice) this value is called the Heartbeat = value. Set the Heartbeat = value to NO, and then save the settings.

Also, on the product's SIP Setup page, make sure that the Register Expiration (minutes) setting is set to less than 6 minutes (5 minutes is good) because it needs to be a value less than the Asterisk default value of 6 minutes. Save the settings after changing the Register Expiration (minutes) setting.

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