Send TFTP clients to different directories based on MAC

I will have a requirement to send different clients to different directories based on their MAC address.  The idea is that based on a choice you make in a form, the MAC address of a phone you enter will be directed to the appropriate directory to get the firmware you need from a TFTP server.  The phones being used will be Cisco 7960/7940 if that matters.  Platform or software used for TFTP server does not matter.  Ive also considered using a few different servers on different ports, and direct them that way.

Any thoughts would be appreciated.
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Matt VCommented:
The firmware files should have different names, normally they would all be in the same TFTP folder and the phone would grab the correct filename.
lorsungcuAuthor Commented:
Do you have experience with Cisco phones and SIP firmware?  From what I know, you need to declare the firmware filename in the OSxxx file, and it will go off of that.

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greg wardSystems EngineerCommented:
The firmware upgrade process requires the OSxxx format. Normally using cme, the router tells the phone which files to load depending on the phone.
These files are stored in the routers flash and are loaded automatically by the phone.
The 7960 and 7940 use the same file if that helps.

lorsungcuAuthor Commented:
Went a different route.
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