open your User`s Manual,there must be something abuot the protocol the PTZ can support.
take AVTECH for an example,
1,select the desired channel of installed PTZ Camera,
2,set ID Number (0-225) of the PTZ Camera,
3,choose Protocol for the PTZ Camera,
4,set the Baud rate of each channel
5,after setting ,press "OK" and then press "APPLY" to confirm.
wish it will help.