pema8250/8125/4250/4125 Firmware Version History:

2.3 Service Release, (12/07/2011)
    - Fixed repetitive insertions of Feedback Suppressor filters when depth is maxed-out.
    - Fixed problem getting Feedback Suppressor filter control parameters.
    - Corrected mis-reporting of DSP cycles for FBS (Feedback Suppressor) and ANC (Ambient Noise Compensation).
    - Improved handling of thermal protection events.
    - Thermal protection timing is now independent of number of channels.
    - Added reporting of RTC Events.
    - Corrected handling of daylight savings time.
    - Improved handling of username and password changes.
    - Corrected problem where some event logging messages could be lost.

2.2 Service Release, (12/09/2010)
    - Updated RS-232 handler to accept any value from 00 to 0F for Header Byte 5

2.1 Service Release, (9/22/2010)
    - Adds support of all 8 Ethersound input channels on all pema models

2.0 Service Release, (7/21/2010)
    - Corrected logic that reads the Model ID sense resistor

1.9 Service Release, (7/15/2010)
    - Added support for more model variants
    - Return preamp gain on channel 1 to 0dB when PBX switch disengaged

1.8 Initial Release