vitto:/etc/asterisk# lsmod|grep oslec
oslec                   8700  0

vitto:/etc/asterisk# modinfo oslec
filename:       /lib/modules/2.6.26-2-686/oslec.ko
description:    Open Source Line Echo Canceller Zaptel Wrapper
author:         David Rowe
license:        GPL
depends:
vermagic:       2.6.26-2-686 SMP mod_unload modversions 686


### System.conf ###
# Span 1: WCTDM/0 "Wildcard TDM410P Board 1" (MASTER)
fxsks=1
echocanceller=oslec,1
# channel 2, WCTDM/0/1, no module.
# channel 3, WCTDM/0/2, no module.
fxoks=4
echocanceller=oslec,4


vitto*CLI> dahdi show channel 1
Channel: 1
File Descriptor: 17
Span: 1
Extension:
Dialing: no
Context: from-pstn
Caller ID:
Calling TON: 0
Caller ID name:
Mailbox: none
Destroy: 0
InAlarm: 0
Signalling Type: FXS Kewlstart
Radio: 0
Owner: <None>
Real: <None>
Callwait: <None>
Threeway: <None>
Confno: -1
Propagated Conference: -1
Real in conference: 0
DSP: no
Busy Detection: no
TDD: no
Relax DTMF: no
Dialing/CallwaitCAS: 0/0
Default law: ulaw
Fax Handled: no
Pulse phone: no
DND: no
Echo Cancellation:
	32 taps
	currently OFF
Actual Confinfo: Num/0, Mode/0x0000
Actual Confmute: No
Hookstate (FXS only): Offhook
[Jun 25 01:23:17] NOTICE[12025]: chan_sip.c:16490 handle_response_peerpoke: Peer '100' is now Reachable. (1006ms / 2000ms)
  == Using SIP RTP CoS mark 5
    -- Executing [617897466@internal:1] Dial("SIP/100-00000007", "DAHDI/g0/617897466,45") in new stack
    -- Called g0/617897466
[Jun 25 01:23:26] WARNING[12679]: chan_dahdi.c:2005 dahdi_enable_ec: Unable to enable echo cancellation on channel 1 (No such device)
    -- DAHDI/1-1 answered SIP/100-00000007
[Jun 25 01:23:48] NOTICE[12028]: chan_iax2.c:8216 update_registry: Restricting registration for peer 'iaxmodem' to 60 seconds (requested 300)
vitto*CLI>