BusinessPhone Communication Platform 4.0
Maintenance Instruction ASB 150 02 > Trouble Shooting

## Upgrading using a modem with the terminal program

If the maintenance centre is remotely located to the exchange the use of a modem is required to cover the distance. In this case the application displays the same prompts and screens. The data rate between CPU-D4 and maintenance PC is up to 9.600 Baud. In case of problems verify that the modem speed is the same data rate settings of the terminal application.

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