Problem: 

Sometimes calls/pages to the PA1 are not disconnected, by the calling phone, because the user does not hang up the call. The pa1_call_timeout setting is set to 300 seconds (5 minutes) by default. Pages to the PA1, during an active page that has not been disconnected, will result in a failed page attempt until 300 seconds has elapsed. 


Solution: 

You can modify the setting and set it to a lower value to disconnect calls in less than 300 seconds;


http://wiki.snom.com/Settings/pa1_call_timeout



You can configure the setting using this HTTP GET;


example disconnect time of 25 seconds:


http://phoneIP/dummy.htm?settings=save&pa1_call_timeout=25


Note:  

There is an open bug report (SCPP-6503) that affects 8.7.5.x firmware. The pa1_call_timeout feature does not work. If you need this feature it is working in the 8.7.3.25.9 version of the firmware;


http://downloads.snom.com/fw/snomPA1-8.7.3.25.9-SIP-f.bin