SIP dropping off after inactivity (OfficeServ 7200)

SIP dropping off after inactivity (OfficeServ 7200)

UDP Timeout timer was set to 0. Follow below on Draytek 2800series to resolve issue. This could happen on all systems connected to any Draytek.

Check the current value
By telnet command “portmaptime -l”, we can check the current value for each application.
1 check current value

Adjust the timeout value
To change the NAT timeout value, enter command “portmaptime -[protocol] [time]”, where [protocol] is a character represents the application (please use command “portmaptime ?” to check the options available), and [time] is a number of seconds. For example, if you'd like to set the timeout value of UDP session to 5 minutes (300 seconds), this can be done by the command “portmaptime -u 300”.
2 change timeout value

After that, you may use the command “portmaptime -l” to check if the current value has changed.
3 show the current value again

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