DTMF causes echo test on dahdi channel to hang

[transfinite]

I’m a newbie and recently set up Asterisk 1.8 using the Debian package. I’m testing a mix of SIP phones and some analog phones connected to a TDM800P board.

I set up an echo test in my dialplan as folows:

exten => 600,1,Playback(demo-echotest) same => n,Echo() same => n,Playback(demo-echodone) same => n,Hangup()

Here’s the problem: it works as expected with both my hard and soft SIP phones. But the phone on the dahdi channel cannot terminate the echo test with the # key. The key gets partially recognized and the echoing stops. No futher keys get recognized, and I have to hang up the phone. The same thing happens if I press any other key besides #.

Here’s the log of what happens:

*CLI> Monitor doohicky got event Ring/Answered on channel 1
channel (1) - signaling (2) - event (ANALOG_EVENT_RINGOFFHOOK)
Setup tone 1100 Hz, 500 ms, block_size=160, hits_required=21
Setup tone 2100 Hz, 2600 ms, block_size=160, hits_required=116
__analog_ss_thread 1
– Starting simple switch on ‘DAHDI/1-1’
Begin DTMF digit: 0x36 ‘6’ on DAHDI/1-1
Begin DTMF digit: 0x36 ‘6’ on DAHDI/1-1
DTMF begin ‘6’ received on DAHDI/1-1
DTMF begin ignored ‘6’ on DAHDI/1-1
End DTMF digit: 0x36 ‘6’ on DAHDI/1-1
End DTMF digit: 0x36 ‘6’ on DAHDI/1-1
DTMF end ‘6’ received on DAHDI/1-1, duration 63 ms
DTMF end passthrough ‘6’ on DAHDI/1-1
waitfordigit returned ‘6’ (54), timeout = 0
Begin DTMF digit: 0x30 ‘0’ on DAHDI/1-1
Begin DTMF digit: 0x30 ‘0’ on DAHDI/1-1
DTMF begin ‘0’ received on DAHDI/1-1
DTMF begin ignored ‘0’ on DAHDI/1-1
End DTMF digit: 0x30 ‘0’ on DAHDI/1-1
End DTMF digit: 0x30 ‘0’ on DAHDI/1-1
DTMF end ‘0’ received on DAHDI/1-1, duration 51 ms
DTMF end passthrough ‘0’ on DAHDI/1-1
waitfordigit returned ‘0’ (48), timeout = 0
Begin DTMF digit: 0x30 ‘0’ on DAHDI/1-1
Begin DTMF digit: 0x30 ‘0’ on DAHDI/1-1
DTMF begin ‘0’ received on DAHDI/1-1
DTMF begin ignored ‘0’ on DAHDI/1-1
End DTMF digit: 0x30 ‘0’ on DAHDI/1-1
End DTMF digit: 0x30 ‘0’ on DAHDI/1-1
DTMF end ‘0’ received on DAHDI/1-1, duration 38 ms
DTMF end passthrough ‘0’ on DAHDI/1-1
waitfordigit returned ‘0’ (48), timeout = 0
Enabled echo cancellation on channel 1
Launching ‘Playback’
– Executing [600@home:1] Playback(“DAHDI/1-1”, “demo-echotest”) in new stack
analog_answer 1
Took DAHDI/1-1 off hook
Requested indication -1 on channel DAHDI/1-1
Set channel DAHDI/1-1 to write format gsm
– <DAHDI/1-1> Playing ‘demo-echotest.gsm’ (language ‘en’)
Set channel DAHDI/1-1 to write format ulaw
Launching ‘Echo’
– Executing [600@home:2] Echo(“DAHDI/1-1”, “”) in new stack
Begin DTMF digit: 0x23 ‘#’ on DAHDI/1-1
Begin DTMF digit: 0x23 ‘#’ on DAHDI/1-1
DTMF begin ‘#’ received on DAHDI/1-1
DTMF begin passthrough ‘#’ on DAHDI/1-1
Channel DAHDI/1-1 started VLDTMF digit ‘#’
analog_exception 1
Exception on 7, channel 1
__analog_handle_event 1
Got event ANALOG_EVENT_ONHOOK(1) on channel 1 (index 0)
Disabled echo cancellation on channel 1
Spawn extension (home,600,2) exited non-zero on ‘DAHDI/1-1’
== Spawn extension (home, 600, 2) exited non-zero on ‘DAHDI/1-1’
Soft-Hanging up channel ‘DAHDI/1-1’
Hanging up channel ‘DAHDI/1-1’
dahdi_hangup(DAHDI/1-1)
analog_hangup 1
Hangup: channel: 1 index = 0, normal = 1, callwait = 0, thirdcall = 0
Set option TONE VERIFY, mode: OFF(0) on DAHDI/1-1
Set option TDD MODE, value: OFF(0) on DAHDI/1-1
Updated conferencing on 1, with 0 conference users
– Hanging up on ‘DAHDI/1-1’
– Hungup ‘DAHDI/1-1’
Monitor doohicky got event Ring/Answered on channel 1
channel (1) - signaling (2) - event (ANALOG_EVENT_RINGOFFHOOK)
Setup tone 1100 Hz, 500 ms, block_size=160, hits_required=21
Setup tone 2100 Hz, 2600 ms, block_size=160, hits_required=116
__analog_ss_thread 1
– Starting simple switch on ‘DAHDI/1-1’
analog_exception 1
Exception on 7, channel 1
__analog_handle_event 1
Got event ANALOG_EVENT_ONHOOK(1) on channel 1 (index 0)
waitfordigit returned < 0…
Hanging up channel ‘DAHDI/1-1’
dahdi_hangup(DAHDI/1-1)
analog_hangup 1
Hangup: channel: 1 index = 0, normal = 1, callwait = 0, thirdcall = 0
Set option TONE VERIFY, mode: OFF(0) on DAHDI/1-1
Set option TDD MODE, value: OFF(0) on DAHDI/1-1
Updated conferencing on 1, with 0 conference users
– Hanging up on ‘DAHDI/1-1’
– Hungup ‘DAHDI/1-1’

There are never any ‘DTMF end’ messages after the first key is pressed.

While trying to debug this myself, I made similar dialplan extensions that used the Read() and Record() applications. Both of these worked correctly over the same dahdi channel – the DTMF codes were received and the # key terminated the application.

Any help or suggestions on what to try next would be appreciated.

[transfinite]

Can anyone please test that ‘#’ correctly terminates an echo test from an analog phone on a dahdi channel? I’d like to confirm that this is just a problem with my configuration. Thanks.