Echo issues

Hi all I havea issue with a de210e

its connected to a German E1, echo cancellation in
Asterisk is enabled, dmesg shows echo cancellation hardware servicing two spans


On some calls I get echo on the line..
Are there some general troubleshooting steps I can take before wildly trying orxut TX and RX ?

I just verified again that echo cancellation is turned on using dahdi show channel, set to 128 taps and on

Echo on lines is rather rare and not always reproducible

Yes, make sure the echo cancellation module is working (peform dahdi show channels x on the console ) while you found there was echo.

Hi and thank you for your response

i have a current example on channel 43 of the card, the internal extension ist "305", the remote party is 00420XXXXXXXXXXXXX

dahdi show channels: [excerpt]
42 from-pstn default In Service
43 356363305 from-pstn default In Service
44 from-pstn default In Service

dahdi show channel 43:
2*CLI> dahdi show channel 43
Channel: 43
File Descriptor: 52
Span: 2
Extension: 356363305
Dialing: no
Context: from-pstn
Caller ID: 0042038[BLANKED]
Calling TON: 17
Caller ID subaddress:
Caller ID name:
Mailbox: none
Destroy: 0
InAlarm: 0
Signalling Type: ISDN PRI
Radio: 0
Owner: DAHDI/i2/004203[BLANKED]-3a34
Real: DAHDI/i2/004203[BLANKED]-3a34
Callwait: <None>
Threeway: <None>
Confno: -1
Propagated Conference: -1
Real in conference: 0
DSP: yes
Busy Detection: no
TDD: no
Relax DTMF: no
Dialing/CallwaitCAS: 0/0
Default law: alaw
Fax Handled: no
Pulse phone: no
Gains (RX/TX): 0.00/0.00
Dynamic Range Compression (RX/TX): 0.00/0.00
DND: no
Echo Cancellation:
128 taps
(unless TDM bridged) currently ON
Wait for dialtone: 0ms
PRI Flags: Call
PRI Logical Span: Implicit
Actual Confinfo: Num/0, Mode/0x0000
Actual Confmute: No
Hookstate (FXS only): Onhook

The employee in question confirmed that the call had echo on the line.

hi
please send ssh information to my email, i will help you to check it
email:[email protected]