[asterisk-users] problem about voice when using TDM2400p with VPMADT032 echo canceller module

Wed Mar 26 22:45:36 CDT 2008

hi you,

  I'm having problem with voice quality on my trixbox using TDM2400B.The trixbox is connected via 20 FXO ports on a TDM2400 with the hardware echo cancel module. Echo cancel almost works, but the users hear what they describe as a 'background crackle/buzz' coming back when they talk. 

  anyone have the same problem? pls help me. thanks a lot.

  my trixbox and config file:

  trixbox version 2.4 (Linux kernel 2.6.18, Zaptel 1.4.7)

  zaptel.conf
  ----------------
  # Autogenerated by /usr/sbin/genzaptelconf -- do not hand edit
# Zaptel Configuration File
#
# This file is parsed by the Zaptel Configurator, ztcfg
#
  # It must be in the module loading order

# Span 1: WCTDM/0 "Wildcard TDM2400P Board 1" 
fxsks=1
fxsks=2
fxsks=3
fxsks=4
fxsks=5
fxsks=6
fxsks=7
fxsks=8
fxsks=9
fxsks=10
fxsks=11
fxsks=12
fxsks=13
fxsks=14
fxsks=15
fxsks=16
fxsks=17
fxsks=18
fxsks=19
fxsks=20
# channel 21, WCTDM, no module.
# channel 22, WCTDM, no module.
# channel 23, WCTDM, no module.
# channel 24, WCTDM, no module.
  # Global data
  loadzone = us
defaultzone = us

  zapata.conf
  ------------------------------
  ; Zapata telephony interface
;
; Configuration file
  [trunkgroups]
  [channels]
  language=en
context=from-zaptel
signalling=fxs_ks
rxwink=300  ; Atlas seems to use long (250ms) winks
;
; Whether or not to do distinctive ring detection on FXO lines
;
;usedistinctiveringdetection=yes
  usecallerid=yes
hidecallerid=no
callwaiting=yes
usecallingpres=yes
callwaitingcallerid=yes
threewaycalling=yes
transfer=yes
cancallforward=yes
callreturn=yes
echocancel=yes
echocancelwhenbridged=no ;default
;echotraining=800 ;default
rxgain=0.0
txgain=0.0
group=0
callgroup=1
pickupgroup=1
immediate=no
  busydetect=yes
busycount=0
  relaxdtmf=yes
;faxdetect=both
faxdetect=incoming
;faxdetect=outgoing
;faxdetect=no
  ;Include genzaptelconf configs
#include zapata-channels.conf
  group=1
  ;Include AMP configs
#include zapata_additional.conf

  zapata_additional.conf
  -------------------------------
  ; Autogenerated by /usr/sbin/genzaptelconf -- do not hand edit
; Zaptel Channels Configurations (zapata.conf)
;
; This is not intended to be a complete zapata.conf. Rather, it is intended 
; to be #include-d by /etc/zapata.conf that will include the global settings
;
  ; Span 1: WCTDM/0 "Wildcard TDM2400P Board 1" 
;;; line="1 WCTDM/0/0"
signalling=fxs_ks
callerid=asreceived
group=0
context=from-zaptel
channel => 1
context=default
  ;;; line="2 WCTDM/0/1"
signalling=fxs_ks
callerid=asreceived
group=0
context=from-zaptel
channel => 2
context=default
  ;;; line="3 WCTDM/0/2"
signalling=fxs_ks
callerid=asreceived
group=0
context=from-zaptel
channel => 3
context=default
  ;;; line="4 WCTDM/0/3"
signalling=fxs_ks
callerid=asreceived
group=0
context=from-zaptel
channel => 4
context=default
  ;;; line="5 WCTDM/0/4"
signalling=fxs_ks
callerid=asreceived
group=0
context=from-zaptel
channel => 5
context=default
  ;;; line="6 WCTDM/0/5"
signalling=fxs_ks
callerid=asreceived
group=0
context=from-zaptel
channel => 6
context=default
  ;;; line="7 WCTDM/0/6"
signalling=fxs_ks
callerid=asreceived
group=0
context=from-zaptel
channel => 7
context=default
  ;;; line="8 WCTDM/0/7"
signalling=fxs_ks
callerid=asreceived
group=0
context=from-zaptel
channel => 8
context=default
  ;;; line="9 WCTDM/0/8"
signalling=fxs_ks
callerid=asreceived
group=0
context=from-zaptel
channel => 9
context=default
  ;;; line="10 WCTDM/0/9"
signalling=fxs_ks
callerid=asreceived
group=0
context=from-zaptel
channel => 10
context=default
  ...........more...........

  [IP-PBX ~]# ztcfg -vv
  ----------------------------------------------
  Zaptel Version: 1.4.7-3259
Echo Canceller: OSLEC
Configuration
======================

Channel map:
  Channel 01: FXS Kewlstart (Default) (Slaves: 01)
Channel 02: FXS Kewlstart (Default) (Slaves: 02)
Channel 03: FXS Kewlstart (Default) (Slaves: 03)
Channel 04: FXS Kewlstart (Default) (Slaves: 04)
Channel 05: FXS Kewlstart (Default) (Slaves: 05)
Channel 06: FXS Kewlstart (Default) (Slaves: 06)
Channel 07: FXS Kewlstart (Default) (Slaves: 07)
Channel 08: FXS Kewlstart (Default) (Slaves: 08)
Channel 09: FXS Kewlstart (Default) (Slaves: 09)
Channel 10: FXS Kewlstart (Default) (Slaves: 10)
Channel 11: FXS Kewlstart (Default) (Slaves: 11)
Channel 12: FXS Kewlstart (Default) (Slaves: 12)
Channel 13: FXS Kewlstart (Default) (Slaves: 13)
Channel 14: FXS Kewlstart (Default) (Slaves: 14)
Channel 15: FXS Kewlstart (Default) (Slaves: 15)
Channel 16: FXS Kewlstart (Default) (Slaves: 16)
Channel 17: FXS Kewlstart (Default) (Slaves: 17)
Channel 18: FXS Kewlstart (Default) (Slaves: 18)
Channel 19: FXS Kewlstart (Default) (Slaves: 19)
Channel 20: FXS Kewlstart (Default) (Slaves: 20)
  20 channels to configure.

  cat /proc/modules
  ---------------------------
  zttranscode 11784 0 - Live 0xf89b8000
ipv6 251393 18 - Live 0xf8ae8000
autofs4 24517 2 - Live 0xf8a5a000
sunrpc 144253 1 - Live 0xf8a79000
wcusb 18048 0 - Live 0xf89b2000
wctdm 37312 0 - Live 0xf89a7000
wcfxo 15008 0 - Live 0xf88bb000
wcte11xp 26656 0 - Live 0xf8961000
wct1xxp 17184 0 - Live 0xf88a0000
wcte12xp 37696 0 - Live 0xf899c000
wct4xxp 297920 0 - Live 0xf8c75000
tor2 91680 0 - Live 0xf8984000
dm_mirror 28869 0 - Live 0xf896b000
dm_multipath 21577 0 - Live 0xf88b4000
dm_mod 58457 2 dm_mirror,dm_multipath, Live 0xf8974000
parport_pc 29157 0 - Live 0xf88fb000
lp 15849 0 - Live 0xf88af000
parport 37513 2 parport_pc,lp, Live 0xf8932000
floppy 57125 0 - Live 0xf8923000
wctdm24xxp 106176 20 - Live 0xf88e0000
zaptel 197176 56 zttranscode,wcusb,wctdm,wcfxo,wcte11xp,wct1xxp,wcte12xp,wct4xxp,tor2,wctdm24xxp, Live 0xf89be000
oslec 13464 1 zaptel, Live 0xf8824000
crc_ccitt 6337 1 zaptel, Live 0xf887d000
e1000 119505 0 - Live 0xf8904000
i2c_i801 11469 0 - Live 0xf8847000
i2c_core 23745 1 i2c_i801, Live 0xf88a8000
serio_raw 10693 0 - Live 0xf8829000
pcspkr 7105 0 - Live 0xf8812000
ata_piix 18501 0 - Live 0xf8841000
libata 115833 1 ata_piix, Live 0xf88c2000
sd_mod 24897 0 - Live 0xf8839000
scsi_mod 132685 2 libata,sd_mod, Live 0xf885b000
ext3 123337 2 - Live 0xf8880000
jbd 56553 1 ext3, Live 0xf884c000
ehci_hcd 32973 0 - Live 0xf882f000
ohci_hcd 23261 0 - Live 0xf881d000
uhci_hcd 25421 0 - Live 0xf8815000

  cat /proc/interrupts
  --------------------------
             CPU0       
  0:  370499389    IO-APIC-edge  timer
  1:          8    IO-APIC-edge  i8042
  2:          0          XT-PIC  cascade
  6:          3    IO-APIC-edge  floppy
  8:          3    IO-APIC-edge  rtc
 12:          4    IO-APIC-edge  i8042
 14:          0    IO-APIC-edge  libata
 15:     438090    IO-APIC-edge  ide1
153:  370597206   IO-APIC-level  uhci_hcd:usb3, ehci_hcd:usb7, Wildcard TDM2400P
161:    6782414   IO-APIC-level  uhci_hcd:usb1, uhci_hcd:usb6, eth0
169:          0   IO-APIC-level  uhci_hcd:usb5
177:          0   IO-APIC-level  uhci_hcd:usb2, libata
185:          0   IO-APIC-level  uhci_hcd:usb4, ehci_hcd:usb8
NMI:          0 
LOC:  370689937 
ERR:          0
MIS:          0

---------------------------------
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