Could someone provide guidance on where I'm running into problems?

[dcr...@amtelco.com]

I'm using Asterisk with UniMRCP.  Trying to run a test of a speech recognition for a call to a Windows Nuance Speech Server (which has Nuance Recognizer 10 installed).

My mrcp.conf contains the following...

 

[general]

default-asr-profile = speech-nuance5-mrcp2

log-level = DEBUG

max-connection-count = 4

offer-new-connection = 1

[speech-nuance5-mrcp2]

; MRCP version.

version = 2

server-ip = NSS IP

server-port = 5060

force-destination = 1

client-ip = Asterisk IP

client-port = 5093

sip-transport = udp

rtp-ip = Asterisk IP

rtp-port-min = 4000

rtp-port-max = 5000

playout-delay = 50

max-playout-delay = 200

ptime = 20

codecs = PCMU PCMA L16/96/8000 telephone-event/101/8000

rtcp = 1

rtcp-bye = 2

rtcp-tx-interval = 5000

rtcp-rx-resolution = 1000

The Asterisk dialplan line is

exten => s,3,MRCPRecog(builtin:grammar/number,p=default&t=5000&b=1&ct=0.7&spl=en-US&f=hello-world)

I see the following in the Asterisk log file

[05/10 07:39:28.702] VERBOSE[1097][C-00000002] pbx.c: Executing [s@mrcprecog-app3:3] MRCPRecog("PJSIP/1005-00000002", "builtin:grammar/number,p=default&t=5000&b=1&ct=0.7&spl=en-US&f=hello-world") in new sta\

ck

[05/10 07:39:28.703] NOTICE[1097][C-00000002] app_mrcprecog.c: MRCPRecog() grammar: builtin:grammar/number

[05/10 07:39:28.703] NOTICE[1097][C-00000002] app_mrcprecog.c: MRCPRecog() options: p=default&t=5000&b=1&ct=0.7&spl=en-US&f=hello-world

[05/10 07:39:28.703] NOTICE[1097][C-00000002] src/mrcp_application.c: Create MRCP Handle 0x7f21bc043a18 [speech-nuance5-mrcp2]

[05/10 07:39:28.703] NOTICE[1097][C-00000002] src/mrcp_client_session.c: Create Channel ASR-2 <new>

[05/10 07:39:28.703] NOTICE[974] src/mrcp_client_session.c: Receive App Request ASR-2 <new> [2]

[05/10 07:39:28.703] NOTICE[974] src/mrcp_client.c: Add MRCP Handle ASR-2 <new>

[05/10 07:39:28.703] NOTICE[974] src/mrcp_client_session.c: Add Control Channel ASR-2 <new@speechrecog>

[05/10 07:39:28.708] NOTICE[974] src/mrcp_client_session.c: Send Offer ASR-2 <new> [c:1 a:1 v:0] to NSSIP:5060

[05/10 07:39:28.708] NOTICE[974] src/mrcp_sofiasip_client_agent.c: Local SDP ASR-2 <new>

v=0^M

o=Asterisk 0 0 IN IP4 AsteriskIP^M

s=-^M

c=IN IP4 AsteriskIP^M

t=0 0^M

m=application 9 TCP/MRCPv2 1^M

a=setup:active^M

a=connection:new^M

a=resource:speechrecog^M

a=cmid:1^M

m=audio 4004 RTP/AVP 0 8 96 101^M

a=rtpmap:0 PCMU/8000^M

a=rtpmap:8 PCMA/8000^M

a=rtpmap:96 L16/8000^M

a=rtpmap:101 telephone-event/8000^M

a=fmtp:101 0-15^M

a=sendonly^M

a=ptime:20^M

a=mid:1^M

[05/10 07:39:28.709] NOTICE[978] src/mrcp_sofiasip_client_agent.c: Receive SIP Event [nua_i_state] Status 0 INVITE sent [speech-nuance5-mrcp2]

[05/10 07:39:28.709] NOTICE[978] src/mrcp_sofiasip_client_agent.c: SIP Call State ASR-2 [calling]

...

[05/10 07:40:00.710] NOTICE[978] src/mrcp_sofiasip_client_agent.c: Receive SIP Event [nua_r_invite] Status 408 Request Timeout [speech-nuance5-mrcp2]

[05/10 07:40:00.710] NOTICE[978] src/mrcp_sofiasip_client_agent.c: Receive SIP Event [nua_i_state] Status 408 Request Timeout [speech-nuance5-mrcp2]

[05/10 07:40:00.710] NOTICE[978] src/mrcp_sofiasip_client_agent.c: SIP Call State ASR-2 [terminated]

[05/10 07:40:00.710] NOTICE[974] src/mrcp_client_session.c: Receive Answer ASR-2 <new> [c:0 a:0 v:0] Status 408

[05/10 07:40:00.710] NOTICE[974] src/mrcp_client_session.c: Raise App Response ASR-2 <new> [2] FAILURE [2]

[05/10 07:40:00.710] ERROR[974] app_mrcprecog.c: (ASR-2) Channel error status=2, response code=408!

[05/10 07:40:00.710] NOTICE[974] src/mrcp_client_session.c: Receive App Request ASR-2 <new> [1]

[05/10 07:40:00.710] NOTICE[974] src/mrcp_client_session.c: Terminate Session ASR-2 <new>

[05/10 07:40:00.710] NOTICE[974] src/mrcp_client_session.c: Session Terminated ASR-2 <new>

[05/10 07:40:00.719] NOTICE[974] src/mrcp_client.c: Remove MRCP Handle ASR-2 <new>

[05/10 07:40:00.719] NOTICE[974] src/mrcp_client_session.c: Raise App Response ASR-2 <new> [1] SUCCESS [0]

[05/10 07:40:00.719] NOTICE[974] src/mrcp_application.c: Destroy MRCP Handle ASR-2

[05/10 07:40:00.719] NOTICE[1097][C-00000002] app_mrcprecog.c: MRCPRecog() exiting status: ERROR on PJSIP/1005-00000002

1) Does my mrcp.conf file look correct for NSS?

2) How do I diagnose if the problem is on the Windows Nuance Speech Server side or Asterisk/UniMRCP side?

3) Is there something I am missing?

Thank you in advance for any guidance you can provide!

Dan

[Arsen Chaloyan]

Hi Dan,

1) Your configuration seems correct.

2) The SIP INVITE message sent from Asterisk/UniMRCP timed out.

[05/10 07:39:28.708] NOTICE[974] src/mrcp_client_session.c: Send Offer ASR-2 <new> [c:1 a:1 v:0] to NSSIP:5060

[05/10 07:40:00.710] NOTICE[978] src/mrcp_sofiasip_client_agent.c: Receive SIP Event [nua_r_invite] Status 408 Request Timeout [speech-nuance5-mrcp2]

If you are certain that NSS is up and listening on NSSIP:5060, then I'd suggest to check the firewall first.

Next, you may use Wireshark on the NSS machine to ensure packets reach the server.

3) Not really, you are a few steps away to make it working.

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Arsen Chaloyan
Author of UniMRCP
http://www.unimrcp.org

[dcr...@amtelco.com]

Thank you Arsen.

It was the Windows Firewall.

After turning that off, UniMRCP with Asterisk worked perfectly.

Have a great day!

Dan

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