I discussed my installation more with Tzafrir last week. He concluded that he thinks I don't have an HFC card. I think it is somewhat a matter of semantics. As far as I have been able to determine, there are at least three general types of HFC cards. By far the most common are cards based on the "Cologne" chip--which are well supported. The second group are based on a "multichannel" chip, which seems to be fairly popular now, particularly for 2 and 4 port BRI cards where a single IC can form the basis of the card. The third group are based on the Winbond W6692 chip. I think the chip was released about 10 years ago. It has not been well supported. That is the chip my card has. It appears that no form of Zaptel or Dahdi, including publicly available patches, supports it.
I'm not sure, but I think mISDN supports it, and I know my card is CAPI compliant, but that may assume a driver that may not exist for Linux. Whether either of these supports US NT1 format remains a question. Also, there is the issue of physical level signaling, which is different in the US than in Europe. I don't know if my NT1 U to S/T adapter takes care of that or not. I do know that there have been products out there that could be used in either market with only a firmware change, so maybe this is a non-issue. One of my TAs (I have several with differing feature sets and in various states of repair and (non) support) will generate a D channel transaction log, which would let me know what exchange is required with the CO. That might be compared to what the channel software does. I might be able to modify the source if necessary, although there are two or three learning curves involved for me. Wilton
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