Unable to hear incoming calls

[techguy]

HI,

I have H323 Voice gateway and CUCM 7. Everything is working fine and i can call outside but when i call inside and i press 0 for the operator or any extension then i cant hear and on the other side (extension) no more ring but there is no sound too. Kidnly suggest what could be the problem.

Thanks.

[ashok_boin]

Hi,

Can you please provide a little more info with an example? Call flow is not clear.

Regards...

-Ashok.

[techguy]

when i call from pstn to inside. i cannot hear any thing. When i dial internal AA pilot number and press 0 after hearing greeting message then i can hear the voice of other.

If i call outside to pstn then i can talk two way.

I have created tranlation pattern which is forwarding my main line (last three digit 999 to AA pilot number)

[Joseph Martini]

If you can reach the phone's webpage (put it's IP address into a browser, which indicates web access is enabled on the phone) place a call where you are getting no way audio and click on the "Stream 1" option on the phone's webpage (this would be the internal IP phone).  Check what the remote port and IP address are it should be the gateway, but could be something else if there is a transcoder/MTP in the call flow.  Then on the gateway again while the same call is still up, run "show call active voice brief" or "show call active voice stats" to confirm that the TX and RX counters are incrementing.  Also refresh the internal IP phone's webpage for Stream 1 to make sure the same TX and RX counters are incrementing.  If they are not try and ping between the IP addresses the call is established between to check connectivity.  If the ping works the next thing I would do is setup a packet capture to make sure the RTP r isn't being blocked by anything in the network.

[techguy]

thnx for ur reply...let me tell something that "Media termination point required" option is unchecked on gateway webpage in CUCM 7. Do i need to check that option.

Secondly when i create translation pattern for some extension ( im by-passing CUE ) like rule 1 /^2021999/ /2222/ before i was having rule 1 /^2021999/ /cue pilot number/ then i can hear the sound.

I think there is problem with CUE settings or "Media termination point required" option....pls suggest.

[ashok_boin]

Hi,

Can you please post "debug voip ccapin inout" command while trying making call from PSTN to inside for both working and not working scenarios? And also, your gateway configuration excluding sensitive info.

This will help to quicky pinpoint the issue.

Regards...

-Ashok.

[techguy]

Please find attached the file of debugging.

isdn switch-type primary-net5
!
!
!
voice-card 0
dspfarm
dsp services dspfarm
!
!
voice call send-alert
voice rtp send-recv
!
voice service voip
allow-connections h323 to h323
allow-connections h323 to sip
allow-connections sip to h323
allow-connections sip to sip
fax protocol t38 ls-redundancy 0 hs-redundancy 0 fallback none
h323
sip
bind control source-interface Loopback101
bind media source-interface Loopback101
registrar server
!
voice class codec 1
codec preference 1 g711alaw
codec preference 2 g711ulaw
codec preference 3 g729r8
!
voice class h323 1
h225 timeout tcp establish 3
!
!
voice register global
mode cme
source-address 10.1.211.1 port 5060
max-dn 100
authenticate register
!
!
voice translation-rule 1
rule 1 /^2021999/ /2222/ now i can hear very well but if i put rule 1 /^2021999/ /9916/ then through AA i cudnt

!
!
voice translation-profile incoming
translate called 1
!
!
!
application
global
service alternate default
!
!

hw-module pvdm 0/0

!
hw-module pvdm 0/1
!
hw-module sm 1
!

controller E1 0/0/0
framing NO-CRC4
pri-group timeslots 1-10,16
!
!
class-map match-all icmp
match protocol icmp
!
!
policy-map icmp
class icmp
    police cir 12500
      conform-action transmit
      exceed-action drop
!
!
!
!
!
interface Loopback101
ip address 10.1.211.1 255.255.255.192
h323-gateway voip interface
h323-gateway voip bind srcaddr 10.1.211.1

!

!

interface Serial0/0/0:15
no ip address
encapsulation hdlc
isdn switch-type primary-net5
isdn incoming-voice voice
no cdp enable
!
interface Integrated-Service-Engine1/0
ip unnumbered Loopback101
service-module ip address 10.1.211.62 255.255.255.192
!Application: CUE Running on NME
service-module ip default-gateway 10.1.211.1
no keepalive
!

call fallback active
!
voice-port 0/0/0:15
translation-profile incoming incoming
bearer-cap Speech
!
voice-port 0/2/0
!
voice-port 0/2/1
!
voice-port 0/2/2
!
voice-port 0/2/3
!
no ccm-manager fax protocol cisco
!
no mgcp package-capability res-package
no mgcp timer receive-rtcp
mgcp fax t38 ecm
!
sccp local Loopback101
sccp ccm 10.50.2.4 identifier 2 version 7.0
sccp ccm 10.50.2.3 identifier 1 version 7.0
sccp
!
sccp ccm group 1
associate ccm 1 priority 1
associate ccm 2 priority 2
associate profile 3 register RAK_MTP
associate profile 2 register RAK_XCODE
associate profile 1 register RAK_CONF
!
dspfarm profile 2 transcode
codec g711ulaw
codec g711alaw
codec g729ar8
codec g729abr8
maximum sessions 12
associate application SCCP
!
dspfarm profile 1 conference
codec g711ulaw
codec g711alaw
codec g729ar8
codec g729abr8
codec g729r8
codec g729br8
maximum sessions 4
associate application SCCP
!
dspfarm profile 3 mtp
codec g711ulaw
associate application SCCP
shutdown
!
dial-peer voice 1 pots
incoming called-number .
direct-inward-dial
!
dial-peer voice 10 pots
tone ringback alert-no-PI
description International
destination-pattern 900.T
fax rate disable
port 0/0/0:15
prefix 00
!
dial-peer voice 11 pots
tone ringback alert-no-PI
description Emergency
destination-pattern 9600....
fax rate disable
port 0/0/0:15
prefix 600
!
dial-peer voice 12 pots
tone ringback alert-no-PI
description Emergency
destination-pattern 9800....
fax rate disable
port 0/0/0:15
prefix 800
!
dial-peer voice 13 pots
tone ringback alert-no-PI
description Mobile
destination-pattern 905........
fax rate disable
port 0/0/0:15
prefix 05
!
dial-peer voice 14 pots
tone ringback alert-no-PI
description National
destination-pattern 90[234678].......
fax rate disable
port 0/0/0:15
prefix 0
!
dial-peer voice 15 pots
tone ringback alert-no-PI
description Local
destination-pattern 9.......
fax rate disable
port 0/0/0:15
!
dial-peer voice 16 pots
tone ringback alert-no-PI
description Emergency
destination-pattern 9...
fax rate disable
port 0/0/0:15
!
dial-peer voice 9916 voip
description To CallManager Pub
preference 1
destination-pattern 991[67]$
session target ipv4:10.50.2.3
voice-class codec 1
voice-class h323 1
dtmf-relay h245-alphanumeric
req-qos guaranteed-delay audio
acc-qos guaranteed-delay audio
fax-relay ecm disable
fax rate 14400
fax nsf 000000
fax protocol pass-through g711ulaw
no vad
!
dial-peer voice 9917 voip
description To CallManager Sub
huntstop
preference 2
destination-pattern 991[67]$
session target ipv4:10.50.2.4
voice-class codec 1
voice-class h323 1
dtmf-relay h245-alphanumeric
req-qos guaranteed-delay audio
acc-qos guaranteed-delay audio
fax-relay ecm disable
fax rate 14400
fax nsf 000000
fax protocol pass-through g711ulaw
no vad
!
dial-peer voice 100 voip
description To CallManager Pub
preference 1
destination-pattern 2...
session target ipv4:10.50.2.3
voice-class codec 1
voice-class h323 1
dtmf-relay h245-alphanumeric
req-qos guaranteed-delay audio
acc-qos guaranteed-delay audio
fax-relay ecm disable
fax rate 14400
fax nsf 000000
fax protocol pass-through g711ulaw
no vad
!
!
!
!
gatekeeper
shutdown
!
!
call-manager-fallback
max-conferences 8 gain -6
transfer-system full-consult
ip source-address 10.1.211.1 port 2000
max-ephones 250
max-dn 500
!

[ashok_boin]

Hi,

Thanks for sharing the inputs.

I am not able to trace the root cause with these logs as well. But, I have seen the called number as 9913 instead of 9916. I guess you have configured 9913 as a member of 9916 AA group but it's still selecting dial-peer 9916 which is routing to CUCM Pub.

Anyhow, let me try to re-look into your logs tomorrow.

Regards...

-Ashok.

[techguy]

media termination point required option is unchecked on gateway webpage...is it due to that option??

[techguy]

Problem has been fixed. I just checked tha media termiantion point required option under gateway webpage of CUCM 7. Its started wroking. Thanks all for your support.

[karthickks0814]

Hello 

I do have the same problem.

Could you please specify that How you pointing out that the 'media termination point' causing the issue?

what are the troubleshooting steps that I need to be taken to fix this issue?

Kindly share this information.

Thank you