Set remote PWM

Using XBee series 1 modules I can set a PWM output using an AT command (ATPn to configure, ATMn to set a value) on the local module, but not a remote one.
Using XBee series 2 modules I can execute an AT command on a remote module, but there is now no AT command to set a PWM output.
How can I set a remote module’s PWM output without resorting to passing an ADC input i.e. by command OTA?