[asterisk-users] transcoding with TC400P

[Katerina Borin]

Hello,

I have transcoding card TC400P installed in server running Debian with
Asterisk 1.4.23. Everything seams to be fine and after I boot up
server I see in dmesg:

  7.590966] Zapata Telephony Interface Registered on major 196
[    7.590966] Zaptel Version: 1.4.12.1
[    7.590966] Zaptel Echo Canceller: MG2
[    7.610963] zttranscode: Loaded.
[    7.618969] wctc4xxp: tc400b0: Attached to device at 0000:02:07.0.
[    7.618969] firmware: requesting zaptel-fw-tc400m.bin
[    8.111186] ACPI: PCI Interrupt 0000:02:07.0[A] -> GSI 19 (level,
low) -> IRQ 19
[   11.400359] wctc4xxp: tc400b0: (G.729a / G.723.1) Transcoder
support LOADED (firm ver = 6.12)
[   11.400359] wctc4xxp: tc400b0: Installed a Wildcard TC: Wildcard
TC400P+TC400M
[   11.400359] zttranscode: Registered codec translator 'DTE Encoder'
with 92 transcoders (srcs=0000000c, dsts=00000101)
[   11.400359] zttranscode: Registered codec translator 'DTE Decoder'
with 92 transcoders (srcs=00000101, dsts=0000000c)
[   11.572355] ACPI: PCI Interrupt 0000:00:1f.5[B] -> GSI 17 (level,
low) -> IRQ 17

in asterisk cli:
Connected to Asterisk 1.4.23.1 currently running on katerin (pid = 3168)
Verbosity was 3 and is now 5
katerin*CLI> transcoder show
0/0 encoders/decoders of 92 channels are in use.

I am trying to do 2 experiments:
1) asterisk1 --->g729--> asterisk2 (with transcoding card) Playfile in
ulaw format
2) asterisk2 --->ulaw--> asterisk2 (with transcoding card) Playfile in
g729 format

In the first case I get all calls proceeding and in asteris2 cli

Connected to Asterisk 1.4.23.1 currently running on katerin (pid = 3168)
Verbosity was 3 and is now 5
katerin*CLI> transcoder show
90/0 encoders/decoders of 92 channels are in use.

But it all does not work for the second case, in asterisk2 cli I get
messages like

[Feb 19 15:18:32] ERROR[3121]: codec_dahdi.c:244 zap_translate: Unable
to attach to transcoder: Input/output error

[Feb 19 15:18:32] WARNING[3121]: translate.c:294
ast_translator_build_path: Failed to build translator step from 8 to 2

[Feb 19 15:18:32] WARNING[3121]: chan_sip.c:3751 sip_write: Asked to
transmit frame type 256, while native formats is 0x4 (ulaw)(4)
read/write = 0x4 (ulaw)(4)/0x100 (g729)(256)

Btw call does go through but transcoding is done by processor not by
TC400P. Did anyone encounter such problem?
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