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MultiVOIP User Guide Operation & Maintenance
463
might indicate that a phone is off hook (FXS) or that an incoming ring is
present (FXO). The IFM receives operating instructions from the voip’s
main processor. For example, the IFM might be instructed to ring the
phone (FXS) or seize the line (FXO). The IFM contains a codec
(coder/decoder) to convert the incoming audio to a PCM stream (pulse
code modulation) which it sends to the DSP (digital signal processor).
The IFM’s codec also converts outgoing PCM to audio.
The firmware of the IFMs will change from time to time and you may
need to upgrade the firmware on your MultiVOIP unit. To do so,
follow these instructions.
1. In the System Information screen of the MultiVOIP Configuration
software, check the version number of the IFM firmware already
installed on the MultiVOIP unit. Write down the version number.
2. Exit the Configuration software program. The MultiVoip
Configuration program must be off when invoking the Download
IFM Firmware command. If it is on, the command will not work.
3.To invoke the Download IFM Firmware command, go to Start |
Programs | MVP____ x.xx | Download IFM Firmware.
4. A warning window will appear: “Downloading IFM Firmware will
reboot the MultiVOIP. Do you want to continue?” Click OK.
4. The “Boot” LED on the front panel of the MultiVOIP will come on.
5. The software will search for an IFM firmware file to use to upgrade
the system. If the file found represents firmware newer than that
already installed on the MultiVOIP (or if you want to overwrite the
same version of firmware) click Open.