I've not used the transcoder hardware card. Looks interesting though.
Udev should handle creating the correct devices, but it's likely that
Digium won't officially support the card unless it's on a system with
Dahdi. We're working towards that, but won't officially support Dahdi
until after the 0.7 release. It's a major interruption which will cause
changes to several parts of the system.
Please let us know what reply you get from Digium.
Regards,
Darrick
On 05/27/2009 09:51 AM, Josh Mahonin wrote:
> Hi all,
>
> I've been using the Digium TC400 G729/G711 transcoder card in various
> Asterisk installations for a while with great results, but I'd like to
> start using it on an embedded platform, such as the Soekris net5501.
>
> I grabbed AstLinux 0.6.5, and with some symlinking (/dev/zaptranscode =>
> /dev/zap/transcode) and firmware copying
> (/lib/firmware/zaptel-fw-tc400m.bin), got the 'wctc4xxp' transcoder
> module loaded with Asterisk recognizing it. During a call however, the
> transcoding thread doesn't seem to be able to read from the device, and
> subsequently no audio is passed between the endpoints. I've tried with
> two known working cards, one of which is back in production. An strace
> is included the end of the message.
>
> I'm pretty sure this isn't strictly a problem with AstLinux, because
> I've installed Asterisk 1.4.24.1 with Zaptel 1.4.12.1 on a new machine a
> stock Linux install and had exactly the same results. Normally I'd just
> change versions and be done with it, but I'd like to start using
> AstLinux for this project, and it doesn't look like upgrading versions
> is a trivial task. :)
>
> I've already put in a ticket with Digium support, but I'm emailing the
> board because I'm hoping someone else here might have run into a similar
> problem and might know a workaround. Unfortunately I haven't found any
> forum postings or bug reports to date about it.
>
> Here's a snippet of an strace between a call from a phone in G729
> (172.20.33.73) and another Asterisk box in G711 (172.20.32.10).
>
> --------
> recvfrom(33,
> "\200\0Vu\353\246\250F*\202rC}}~~\377\376\376\376\376}~"..., 8192, 0,
> {sa_family=AF_INET, sin_port=htons(25862),
> sin_addr=inet_addr("172.20.32.10")}, [16]) = 172
> gettimeofday({1243434707, 29870}, NULL) = 0
> time(NULL) = 1243434707
> write(37,
> "\370\377\360\377\360\377\360\377\370\377\10\0\370\377\370"..., 160) = 160
> poll([{fd=37, events=POLLOUT, revents=POLLOUT}], 1, 50) = 1
> read(37, 0x81e31a0, 8000) = -1 EAGAIN (Resource
> temporarily unavailable)
> poll([{fd=29, events=POLLIN|POLLPRI, revents=POLLIN}, {fd=30,
> events=POLLIN|POLLPRI}, {fd=31, events=POLLIN|POLLPRI}, {fd=33,
> events=POLLIN|POLLPRI}, {fd=34, events=POLLIN|POLLPRI}, {fd=35,
> events=POLLIN|POLLPRI}], 6, -1) = 1
> fcntl64(31, F_GETFL) = 0x800 (flags O_RDONLY|O_NONBLOCK)
> read(31, 0xbb7fa53c, 4) = -1 EAGAIN (Resource
> temporarily unavailable)
> recvfrom(29,
> "\200\22\355\310\n3\326\273H\256A\233x\6\36\353\300\272"..., 8192, 0,
> {sa_family=AF_INET, sin_port=htons(2222),
> sin_addr=inet_addr("172.20.33.73")}, [16]) = 32
> gettimeofday({1243434707, 47654}, NULL) = 0
> time(NULL) = 1243434707
> write(38, "x\6\36\353\300\272\316\314\rV\370~\271\270\250\232\326"...,
> 20) = 20
> poll([{fd=38, events=POLLOUT, revents=POLLOUT}], 1, 50) = 1
> read(38, 0x81e5276, 1024) = -1 EAGAIN (Resource
> temporarily unavailable)
> poll([{fd=33, events=POLLIN|POLLPRI, revents=POLLIN}, {fd=34,
> events=POLLIN|POLLPRI}, {fd=35, events=POLLIN|POLLPRI}, {fd=29,
> events=POLLIN|POLLPRI}, {fd=30, events=POLLIN|POLLPRI}, {fd=31,
> events=POLLIN|POLLPRI}], 6, -1) = 1
> fcntl64(35, F_GETFL) = 0x800 (flags O_RDONLY|O_NONBLOCK)
> read(35, 0xbb7fa53c, 4) = -1 EAGAIN (Resource
> temporarily unavailable)
> --------
>
> Thanks,
>
> Josh
>
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