
On 2023-03-19 20:54, Lennart Sorensen via talk wrote:
Of course in theory it shouldn't make any difference if the conversion from analog to digital happens in the box in your house or at the local bell building. Assuming of course that they implemented it the same way in both placed, which they should, but maybe they didn't.
I have seen multiple people claim fax machines work over thair VoIP connection, which surprised me, because I was under the impression that they didn't. Apparently some VoIP systems actually are fully compatible with what the phone system has been doing at the central office and hence work with the exact same equipment as the "analog" phone line did. If hasn't really been that analog for decades after all.
Again, what is the problem we're trying to fix? I have heard nothing about why emulated POTS won't work. As far a FAX goes, I heard the same thing, but I've never seen it fail, even though I have installed VoIP PBX, where the customer was still using FAX. A standard toll quality POTS line has a bandwidth of approximately 300 - 3500 Hz. VoIP has no problem meeting that and in fact there is now "HD Voice", where VoIP is superior to POTS. Again, I have worked in telecom for the past half century. Until we know what the issue is, we're just guessing. What specifically is the issue with this equipment???