ATA 186 and one way audio

[gossa1973]

I add ATA-186 SCCP to CME 8.6 infrastrukture, I can make calls and receive them but audio goes only in one direction from CME to ATA-186 . I try different calls from ATA-186 to another SCCP extension , SIP extension , SIP trunk , PSTN line same problem . I try with both phone ports on ATA-186 same result..

Does anybody have idea how to trubelshot problem.

here is some HW and CONF details

ATA-186-I2-A with sw 3.02.04(090202A)

Audio parametars

LBRCodec =3

AudioMode=0x00150015

ConnectMode=0x90002400

FXSInputLevel=-1

FXSOutputLevel=-4

CME ver 8.6 on ISR 2901 with IOS c2900-universalk9-mz.SPA.151-4.M.

voice service voip

allow-connections h323 to h323

allow-connections h323 to sip

allow-connections sip to h323

allow-connections sip to sip

supplementary-service h450.12

fax protocol pass-through g711alaw

modem passthrough nse codec

h323

!

voice class codec 1

codec preference 1 g711alaw

codec preference 2 g711ulaw

!

....

dial-peer voice 1002 voip

....

modem passthrough nse codec g711alaw

...

dtmf-relay sip-notify rtp-nte

codec g711alaw

fax rate disable

no vad

......

ephone-dn  15

number 215

label 215

.....

ephone  15

device-security-mode none

mac-address 04FE.7F69.CBB8

max-calls-per-button 2

username "yyy" password xxx

type ata

button  1:15

....

this two port will be used for credit card POS terminals , they need to support modem connection to bank over SIP trunk

please HELP me

[Edson Pineiro]

Hello,

My name is Edson Pineiro, I understand that your problem description is in regards to one way audio, were the audio (rtp packet) does not reach the ATA sourced from the CME.

According to your dial-peers your trying to use g711alaw, however your connection mode parameter bit 2 is set to 0, please change it to 1. Your ata configuration should look like the following:

LBRCodec: 2
Audio Mode: 0x00150015
Connection Mode: 0x00002404

Please apply the above change and test. You can confirm if the rtp packet reaches the ata with a packet capture and wire-shark. 

Please be advised that ata do not support modem. In most cases it will work using best effort modem calls using purely g711 where this codec is good enough to pass through fax/modem as inband. However in order for inband modem to work (best effort) you need to ensure all dtmf relays are disabled and that the dial-peer is simple. 


Please let me know how you go.

Thank you

&

Regards
Edson Pineiro