# Internal SMDR

Internal SMDR collects data for calls made between stations. You can use internal SMDR call data to

- bill internal calls back to departments

- determine station usage

- track hoax calls that originate from a station

- keep a record of all internal calls that a specific station has been involved in.

You can output Internal SMDR records from the system providing:

- A compatible output device (for example data recorder) is connected to an LPR1 port

- Report Internal Calls is enabled in the SMDR Options form

- SMDR - Internal is enabled in the class of service of any of the stations involved in the call.