recently I tried to configure a Cisco UC540 using two FXO interfaces and 4 Ip Phone Cisco SPA504G. The configuration was performed using the tool wizard (also if I don't much trust with this tool) and, from my point of view is a very simple and basic configuration.
All the phones are correctly registered both FXO interfaces are up and I'm able to send an external call from the phone, the problem arise when I receive a call from the external path, in this case the destination phone hang and only a reboot can restart the frozen phone.
Here below the UC and Phone version:
Software Version UC 540 with FXO
IOS Image: uc500-advipservicesk9-mz.151-4.M5
CME Version: 8.6
Voicemail Version: 8.6.5
Active Locale Settings
Phone Region: Italian
Phone Language: Italian
Voicemail Language: Italian
Alternate Locale Settings
Phone Region: US English
Phone Language: US English
Voicemail Language: None
Telefoni: Cisco SPA 504G
Firmware version: 7.5.2b
I also submit the configuration (from the CLI) and some logs.
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