"Unable to attach to transcoder: Input/output error"

Asterisk Asterisk General
1

We have just started to see these messages. .Any ideas would be appreciated.

Asterisk 11.2 on Debian – 2 transcoders installed

[2017-03-20 11:00:27] ERROR[18808][C-0001923d]: codec_dahdi.c:452 dahdi_translate: Unable to attach to transcoder: Input/output error
[2017-03-20 11:00:31] WARNING[18808][C-0001923d]: translate.c:445 ast_translator_build_path: Failed to build translator step from g729 to slin
[2017-03-20 11:00:31] WARNING[18808][C-0001923d]: channel.c:6240 ast_channel_make_compatible_helper: Unable to set read format on channel SIP/3217019305-0000e5f3 to slin

I did a graceful restart and saw this:
[2017-03-20 11:35:14] WARNING[19084]: translate.c:599 generate_computational_cost: Translator ‘zapg729toslin’ appears to be broken and will probably fail.
== Registered translator ‘zapg729toslin’ from format g729 to slin, table cost, 900000, computational cost 999999
== Registered translator ‘ulawtolin’ from format ulaw to slin, table cost, 900000, computational cost 1
== Registered translator ‘lintoulaw’ from format slin to ulaw, table cost, 600000, computational cost 1
== Registered translator ‘lintotestlaw’ from format slin to testlaw, table cost, 600000, computational cost 1
== Registered translator ‘testlawtolin’ from format testlaw to slin, table cost, 900000, computational cost 1

Anyone have any ideas?

2

Maybe something went wacky in the wctc4xxp kernel module. Did you try unloading and reloading it?

Digium’s Support personnel don’t visit these community forums, so no one familiar with troubleshooting that product will be here. Digium’s Support team can be contacted using the means outlined at www.digium.com/support

Cheers

3

What is the best way to do that Malcolmd?

Thanks,
Tom

4

Howdy,

Installing kernel modules is usually handled during startup scripts/processes (depends on your Linux distribution) and removing may also be handled by scripts/processes (depends on your Linux distribution).

The commands underlying all of that are usually “modprobe” for installing and “rmmod” to remove them.

Some Googling, based on your Linux distribution, may be in order.

Page 25 of the card’s manual (https://www.digium.com/sites/digium/files/voice-compression-card-user-manual.pdf) describes the module installation process.

As stated earlier, Digium’s Support department provides support for Digium’s commercial products, which include the TC(E)400 cards, the only consumers of codec_dahdi.