[VoIP] Mediatrix APAs

[Steph Kerman]

Of course it is common to be able to flash new firmware into many or 
most things made in the last 10 years from modem cards to memory card 
readers or CDROM drives.  My point was with regard to which protocols 
they support.

Do you have a box of the Mediatrix units or something else?  As I 
understand it, the organization they came from has many more still in 
service and they work.  That does not mean they will be useful with * 
but that does not necessarily make them useful to me.   My world is not 
*-centric.

Steph

David Josephson wrote:
> Steph Kerman wrote:
>   
>> More careful reading of the manual states there are H.323, SIP and MGCP 
>> versions based on firmware resident in non-volatile but updatable 
>> memory.  Not sure whether or not that changes anything you said.
>>   
>>     
> Yes, it is common to be able to reload an EEPROM with a different 
> revision for different protocols. For instance I have some very nice 
> Siemens desk phones that can be flashed to be SIP or MGCP. It does not 
> change anything I said -- things that we take for granted, like being 
> able to support STUN (i. e. operate behind NAT) are often missing, and 
> the protocol implementations are often incomplete. My Siemens phones 
> work great -- so long as they are on the same physical network with the 
> switch. Oh, and except that they go to sleep and require a power cycle 
> to start functioning again, after a day or three. "Oh, we fixed that in 
> the next revision of the board and pulled all those from the market."
>
> Unless you have a need to share the pain of embedded systems development 
> with some programmers who were just learning how to write microprocessor 
> code, I'd leave them all alone (and I have a nice box of them that are 
> being left alone).
>
> --
> David
>
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