How about a school strapped for cash, with around 60 POTS phones on hand and an almost free source of another 60? Versus a cost (here in Austria) of $99 for the cheapest VoIP phone (the cheapest Grandstream model). Of course that also means that FXS is only of interest if I can get it for under around $50-60/port -- if things cost more it becomes easier to argue early replacement of these POTS phones by IP phones.
Benjamin on Asterisk Mailing Lists <[EMAIL PROTECTED]> writes,
I don't really understand the obsession with FXS devices.
The only uses I see for FXS are
- connect a FAX machine, where FAX may not be the best application for VoIP anyway, - connect an existing cordless phone, where you probably have only one such device and a Grandstream HT286 will just do fine, - connect the analog phone in a hotel to a travel adapter, IAXy would seem to be the best choice here because you are so much more likely to encounter NAT traversal problems and other obstacles that you may not be able to resolve with a SIP device, - feed some Internet based phone services into a legacy PBX that wants to see them as CO lines, here again, depending on the number of feeds, HT286 may be cheap and cheerful enough.
For anything else IP phones should be the default with no buts and no ifs. I am always puzzled by how people desperately hang on to legacy stuff they don't really need and in the process create a beast of a kludge technology. The x86 architecture (or lack thereof) should be an example that serves to show how not to design your stuff with legacy support as your all-overriding number one priority. So, let's not make the same mistake with VoIP. Let's get rid of analog phones as fast and forcefully as we possibly can.
In other words, FXS should be the very very last resort when there is really no other way.
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