Cisco Support Community
cancel
Showing results for 
Search instead for 
Did you mean: 
Announcements

Attention: The Community will be in read-only mode on 12/14/2017 from 12:00 am pacific to 11:30 am.

During this time you will only be able to see content. Other interactions such as posting, replying to questions, or marking content as helpful will be disabled for few hours.

We apologize for the inconvenience while we perform important updates to the Community.

New Member

Voice Gateway – Call connects Ok but dead air in both directions. Need help in interpreting debug output.

Debug voice ccapi inout   is attached.

The numbers as follows:

Originating number:  +86 – 212 – 850 – 7205

Destination Number: +65 – 6215 – 7878

Voice Gateway has E1 controllers 1/0, 1/1, 2/0 and 2/1.

When calls are established via 1/0 or 1/1 the call setup is fine, but dead air in both directions – no voice. But when calls are established cia 2/0 or 2/1 everything works fine and there is no problem. These 4 x E1 lines connect to a PBX. So temporarily 1/0 and 1/1 are shut down as a work-around and all OK. These were all working before and there has been no config or IOS change. So we ssuspect H/W failure.

Slot 1 and 2 of this Cisco 3745 router has High Density Voice Adapter Module P/N 800-03567-01 with E1 (2 Port) Multi-Flex Trunk (Drop&Insert) WAN Daughter Card.

Partial config of the router:

dial-peer voice 9999 voip

application session

destination-pattern .......

voice-class codec 1

session protocol sipv2

session target dns:net.abc.def.com

dtmf-relay rtp-nte

icpif 25

ip qos dscp ef signaling

no vad

!

dial-peer voice 1 pots

description 8 digits because sip proxy inserts 1

destination-pattern ........

progress_ind alert enable 8

no digit-strip

direct-inward-dial

port 1/0:15

forward-digits 7

!

dial-peer voice 2 pots

description 8 digits because sip proxy inserts 1

destination-pattern ........

progress_ind alert enable 8

no digit-strip

direct-inward-dial

port 1/1:15

forward-digits 7

!

dial-peer voice 3 pots

description 8 digits because sip proxy inserts 1

destination-pattern ........

progress_ind alert enable 8

no digit-strip

direct-inward-dial

port 2/0:15

forward-digits 7

!

dial-peer voice 4 pots

description 8 digits because sip proxy inserts 1

destination-pattern ........

progress_ind alert enable 8

no digit-strip

direct-inward-dial

port 2/1:15

forward-digits 7

Everyone's tags (5)
6 REPLIES
New Member

Re: Voice Gateway – Call connects Ok but dead air in both dire

Forgot to add dial peer voice 999 ( triple 999 )  but 9999 dial pe

er already added.

dial-peer voice 999 voip
description default inbound matching dial-peer
voice-class codec 1
incoming called-number .
dtmf-relay rtp-nte
icpif 25
ip qos dscp ef signaling
no vad

The debugs were done when E 1/0 first and then E1/1 were temorarily enabled and calls were established from and to the numbers stated in the previous entry

Hall of Fame Super Gold

Re: Voice Gateway – Call connects Ok but dead air in both dire

Do you have NAT or Firewall devices in path between routers  ?

New Member

Re: Voice Gateway – Call connects Ok but dead air in both dire

I am yet to understand the debug voice ccapi inout, but there is the show voice dsp cpmmand done twice as indicated in the attached file. These two successive show voice dsp commands were done during teh dead air connected call.

I notice:

The first time   show voice dsp       showed - partial output without showing all idle DSPs

DSP  DSP             DSPWARE CURR  BOOT                         PAK     TX/RX
TYPE NUM CH CODEC    VERSION STATE STATE   RST AI VOICEPORT TS ABORT  PACK COUNT
==== === == ======== ======= ===== ======= === == ========= == ===== ============
C549 001 01 g729r8   4.4.702 busy  idle      0  0 1/0:15    01     0 535950174/46

                                                                                               2204615

               02 {medium} 4.4.702 IDLE  idle         0 1/0:15    02     0 116573250/11
                                                                                               8555215

C549 008 01 {medium} 4.4.702 IDLE  idle      0  0 1/0:15    30     0      0/11651
               02 g729r8   4.4.702 busy   idle           0 1/0:15    31    0      0/44115

The second time   show voice dsp       showed - partial output without showing all idle DSPs

DSP  DSP             DSPWARE CURR  BOOT                         PAK     TX/RX
TYPE NUM CH CODEC    VERSION STATE STATE   RST AI VOICEPORT TS ABORT  PACK COUNT
==== === == ======== ======= ===== ======= === == ========= == ===== ============

C549 001 01 g729r8   4.4.702 busy  idle      0  0 1/0:15    01     0 535954017/46
                                                                                               2208522    
               02 {medium} 4.4.702 IDLE  idle         0 1/0:15    02     0 116573250/11
                                                                                                8555215

C549 008 01 {medium} 4.4.702 IDLE  idle      0  0 1/0:15    30     0      0/11651
               02 g729r8   4.4.702 busy  idle         0 1/0:15    31       0      0/48018

See the RED - counters for TX PACK CNT remain 0.

New Member

Re: Voice Gateway – Call connects Ok but dead air in both dire

bevilacqua,

Using E1 controllers 2/0 and 2/1 on the same Cisco 3745 everything works fine. But when using E1 controllers 1/0 and 1/1 causes the problem of dead air in both directions after call sets up successfully.

I don't think this is a NAT FW issue between router and the network if you are thinking of RTP packets being dropped by FW.

Hall of Fame Super Gold

Re: Voice Gateway – Call connects Ok but dead air in both dire

Have you tried reloading the router ?

New Member

Re: Voice Gateway – Call connects Ok but dead air in both dire

NM-HDV2E160 in Slot 1 ws replaced and the problem got resolved. I am sure if we had just changed the DSP in slot 2 of this card that would have resolved too, but we had pressure from customer to fix in one go.

1358
Views
0
Helpful
6
Replies
CreatePlease to create content