Can a CSVR record Alarm.com and third-party cameras simultaneously?

Yes. Any Pro Series Commercial Stream Video Recorder (ADC-CSVR2000P/2008P/2016P and ADC-CSVR2108P/2116P) or the ADC-SVR210 can record both Alarm.com and third-party cameras simultaneously as long as the supported networking topology is used. 

For more information about the supported network topology, see Supported networking layouts (topology).