Re: Issues with echos LCR <-> Asterisk

Johannes Morgenroth schrieb:
> Hello.
>
> I have an issue with the Linux Call Router in combination with 
> asterisk (chan_lcr) and I hope I am right here.
>
> First, my set-up is a dedicated host with Ubuntu 12.10 with the latest 
> and greatest git versions of mISDN, mISDNuser and the lcr software 
> installed. The lcr manages a quadbri using mISDN with a ptmp NT port 
> connected to an Gigaset Basestation and a ptmp TE port connected to 
> the Telekom. (Some more data is attached at the bottom of the mail.)
>
> The interfaces for mISDN are configured straight forward 
> (/etc/lcr/interface.conf):
> [isdnext0]
> extern
> portnum 0
>
> [isdnint0]
> extension
> portnum 1
> nt
>
> Additional to the ISDN card I connected an Asterisk 
> (1.8.13.1~dfsg-1ubuntu2) using the chan_lcr plugin.
>
> [astint]
> remote asterisk
> context incoming-lcr
> extension
> earlyb no
> tones yes
> screen-out national % 0%
> screen-out international % 00%
>
> Everything works fine if I stay in the ISDN world. Calls go out and in 
> without any bad happen. But if I inter-connect between asterisk and 
> lcr (e.g. SIP client <-> ISDN Phone), I hear an echo of my own voice 
> on the SIP side only, even if the remote side is muted. Since I tested 
> this with SIP clients only, I checked SIP <-> SIP too and got no echo 
> there. Further, I tried different SIP clients (Gigaset S450 IP, 
> Android Phones and a SoftPhone for Linux), all with the same result.
>
> During my search for a solution, I tried to switch on the echo 
> cancellation by adding "filter pipeline oslec" to the "astint" 
> interface, but this does not changed anything.

Did you install oslec? You also need to install this and compile against 
mISDN and kernel.
But I didn´t do this for a long time because kernel oslec didn´t work 
with git mISDN.

Since that day i work without oslec ;(
Maybe now its possible to compile oslec against recent(your) kernel and 
mISDN.
Let me know if it works ;)


>
> Are there any known solution for echo issues on chan_lcr?
> Is anybody out there with a similar set-up without such an issue and 
> can send me a working configuration?
> How is echo cancellation configured in the recent lcr version? There 
> are many changes in the code and the available documentation does not 
> seems to match anymore.
>
> Kind regards,
> Johannes
>
> PS: Ich nehme auch gerne Antworten auf Deutsch entgegen. :-)
>
>
> # GIT versions of the source
> mISDN git c7bbed7
> mISDNuser git 1dc4c24
> lcr git 0f05685
>
> # Description of the PCI QuadBRI card
> $ lspci -vvv
> 02:00.0 ISDN controller: Cologne Chip Designs GmbH ISDN network 
> Controller [HFC-4S] (rev 01)
>     Subsystem: Cologne Chip Designs GmbH HFC-4S [IOB4ST]
>     Control: I/O- Mem+ BusMaster- SpecCycle- MemWINV- VGASnoop- 
> ParErr- Stepping- SERR- FastB2B- DisINTx-
>     Status: Cap+ 66MHz- UDF- FastB2B- ParErr- DEVSEL=medium >TAbort- 
> <TAbort- <MAbort- >SERR- <PERR- INTx-
>     Interrupt: pin A routed to IRQ 20
>     Region 0: I/O ports at 1000 [disabled] [size=8]
>     Region 1: Memory at 80000000 (32-bit, non-prefetchable) [size=4K]
>     Capabilities: <access denied>
>     Kernel driver in use: hfc_multi
>     Kernel modules: hfcmulti, hfc4s8s_l1
>
> # Loaded modules
> $ lsmod
> Module                  Size  Used by
> mISDN_dsp_oslec        13089  0
> hfcmulti               79813  12
> mISDN_dsp             208409  1 mISDN_dsp_oslec
> coretemp               13400  0
> ppdev                  17073  0
> snd_hda_codec_realtek    77876  1
> microcode              22803  0
> mISDN_core             97578  11 hfcmulti,mISDN_dsp
> psmouse                95552  0
> hisax                 460979  0
> crc_ccitt              12667  1 hisax
> serio_raw              13215  0
> isdn                  147435  1 hisax
> lpc_ich                17061  0
> parport_pc             32688  1
> snd_hda_intel          33491  0
> snd_hda_codec         134212  2 snd_hda_codec_realtek,snd_hda_intel
> snd_hwdep              13602  1 snd_hda_codec
> snd_pcm                96580  2 snd_hda_intel,snd_hda_codec
> snd_timer              29425  1 snd_pcm
> snd                    78734  6 
> snd_hda_codec_realtek,snd_hda_intel,snd_hda_codec,snd_hwdep,snd_pcm,snd_timer
> soundcore              15047  1 snd
> ext2                   72880  1
> mac_hid                13205  0
> snd_page_alloc         18484  2 snd_hda_intel,snd_pcm
> gma500_gfx            169091  1
> drm_kms_helper         46784  1 gma500_gfx
> drm                   275528  2 gma500_gfx,drm_kms_helper
> i2c_algo_bit           13413  1 gma500_gfx
> video                  19335  1 gma500_gfx
> lp                     17759  0
> parport                46345  3 ppdev,parport_pc,lp
> e1000e                199114  0
>
> _______________________________________________
> isdn4linux mailing list
> [email protected]
> https://www.isdn4linux.de/mailman/listinfo/isdn4linux
>
>


-- 
Gruss, Joerg