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New Member

One Way Voice (CCM-<H.323 Gateway)

Hi everyone,

Im stuck with this Problem. Having CCM 4.0+ Two Cisco Voice Gateway 2811 (WIC E1 (2 port,PVDM2-16,PVDM2-48). IOS Version 12.3(8)T7. Some User are experiencing One Way Voice (It s always the customer(from PSTN) who cannot hear the User), this happen sporadically(so the same users can have normal calls). Already updated the firmware of the IP-Phones, Problem still existing. The two gateway are in 2 Route Groups:

GW1 Route_Groupe_1

GW2 Route_Groupe_2

A Route List contain the two Route Groupes with high priority to GW1.

The GW1 is handling all in and out wheras GW2 is handling just In Calls.

Checked the E1 Controller:

E1 0/0/0 is up.

Applique type is Channelized E1 -

balanced

No alarms detected.

alarm-trigger is not set

Version info Firmware: 20040202, FPGA:

11

Framing is CRC4, Line Code is HDB3,

Clock Source is Line.

CRC Threshold is 320. Reported from

firmware is 0.

Data in current interval (284 seconds

elapsed):

0 Line Code Violations, 0 Path Code

Violations

0 Slip Secs, 0 Fr Loss Secs, 0 Line

Err Secs, 0 Degraded Mins

0 Errored Secs, 0 Bursty Err Secs,

0 Severely Err Secs, 0 Unavail Secs

Total Data (last 24 hours)

0 Line Code Violations, 0 Path Code

Violations,

0 Slip Secs, 0 Fr Loss Secs, 0 Line

Err Secs, 0 Degraded Mins,

0 Errored Secs, 0 Bursty Err Secs,

0 Severely Err Secs, 0 Unavail Secs

Seems to be running normal.

added the following command..didnt help:

voice rtp send-recv

h323-gateway voip bind srcaddr (GW1-IP)

Any Ideas?

Thank you

14 REPLIES
New Member

Re: One Way Voice (CCM-<H.323 Gateway)

Do you have flex enabled? Make sure you have enough DSP resources.

New Member

Re: One Way Voice (CCM-<H.323 Gateway)

What do you mean with Flex enabled?

How can i check if there are enough DSP resources on 2811GW`??

New Member

Re: One Way Voice (CCM-<H.323 Gateway)

Hi,

I've got the same situation with my CCM 4.1 and Cisco2811. In my case, I’ve MGCP between the CCM an GW.

There is no Slips on E1, MGCP GW was bounded to CCM with appropriate mgcp bind command.

In my case, I’ve got one-way audio at the middle of conversation!

More over, patient user claims that after 20 seconds of one-way audio he got a good chance to have two-way conversation again!

PS: QoS is configured.

New Member

Re: One Way Voice (CCM-<H.323 Gateway)

Hi,

Thank you both for Answers. The problem still exist. The User that experience the One-Way-Voice Problem, start always a normal Converstation but after (a maximum of 3min) it turns on One-Way-Voice Conversation. so the Cutomer from the PSTN cant hear the User. Yesterday i had the Chance to ping the Gateway from a User PCs who during the ping had a one-way-voice. Result is that the Gateway didnt answer the ping fast (After One request time out he did answer). However I checked the E1 Connection (all Channels are working fine). h323-gateway voip bind srcaddr (IP-GW1) didnt help.

@Danny: the command you told me to check if i have flex complexity dont exist: sh voice dsp group all.

i issued sh voice dsp detailed it showed the chanel that are busy/idle.

the Modules i have (PVDM2-16 and PVDM2-48) can support 16 and 48 Channel this is more than enough for us.

The Fastethernet interface of the Gateway that is connected to the Catalyst shows also no errors or packets drop.

@pavel: i use H323 gateway but i think i have the same problem as u had (middle of conversation->one-way-voice)

Any ideas?

New Member

Re: One Way Voice (CCM-<H.323 Gateway)

Hi,

I've found the following bug CSCsb65867 which is look like our situation.

It’s about NM-HDV2, but the PVDM module revision is the same!

May be we’ve got some sing similar?

BTW, what kind of LAN switch are you using in your LAN environment?

New Member

Re: One Way Voice (CCM-<H.323 Gateway)

Hi Pavel,

Ill take a look at the Bug...

We re using two Catalyst 4000 with Supervisor II+TS.

New Member

Re: One Way Voice (CCM-<H.323 Gateway)

Hi Pavel,

The Bug you mentioned is for MGCP not H323.

New Member

Re: One Way Voice (CCM-<H.323 Gateway)

Hi Jayd,

I am working with Pavel on this problem. We think, that gateway protocol makes no sense. Our gateway works with MGCP, your gateway works with H.323, but we have same problem.

In my opinion, the problem hides somewhere in PVDM2 modules. Which version of DSPWare you have? Have you tried to remove one of PVDM's?

In bug description was stated, that problem was fixed in IOS 12.4.5, but VOICE version of this IOS is deferred.

New Member

Re: One Way Voice (CCM-<H.323 Gateway)

We ´re running Version 12.3(8)T7, PVDMII DSP SIMM with one DSP and PVDMII DSP SIMM with three DSPs.

I m just asking myself why the Gateway didnt answer the ping fast when during this ping the Agent was experiencing One-Way-Voice. Other Agent at the same Time had no problem with the same Gateway.

JayD

New Member

Re: One Way Voice (CCM-<H.323 Gateway)

Perhaps, you have met some CoS issues, when the user's PC traffic affects outgoing RTP stream. Or, vice versa, dropped echo requests/replies are consequence of working CoS, which reduces bandwidth for other traffic types, allowing RTP stream to occupe maximum bandwidth.

Have you tried to reproduce one-way-audio situation, when user's PC is generating a lot of traffic (using ftp upload of a huge file, for example) and placing a call in the same time? I have tried, but with no success -- the voice quality was pretty good.

Bronze

Re: One Way Voice (CCM-<H.323 Gateway)

Hi ,

We had the same problem for one customer.Do you have transcoder and conference programmed on the router?

If yes how many session?.

Thanks,

Radhika

New Member

Re: One Way Voice (CCM-<H.323 Gateway)

Hi, Radhika

We had assigned all dsp resources to only terminate voice sessions. We have'nt configured any DSP farms. Here is part of our config:

!PVDM2's on motherboard

voice-card 0

codec complexity medium

no dspfarm

!PVDM2's on NM2-HDA

voice-card 1

no dspfarm

New Member

Re: One Way Voice (CCM-<H.323 Gateway)

And here is mine (other lines are omitted):

isdn switch-type primary-net5

isdn voice-call-failure 0

!

voice-card 0

dspfarm

dsp services dspfarm

!

!

voice call send-alert

voice call convert-discpi-to-prog

voice rtp send-recv

!

voice service voip

h323

call start slow

!

!

voice class codec 1

codec preference 1 g711ulaw

codec preference 2 g711alaw

codec preference 3 g729r8

codec preference 4 g729br8

!

!

!

voice class h323 1

h225 timeout tcp establish 3

!

voice translation-rule 1

rule 1 /^\(.*\)/ /0\1/ type subscriber subscriber

rule 2 /^\(.*\)/ /00\1/ type national national

rule 3 /^\(.*\)/ /000\1/ type international international

!

voice translation-rule 2

----omitted---

!

voice translation-rule 3

---omitted----

!

voice translation-rule 4

---omitted----

!

!

voice translation-profile CXS-ORI

translate calling 1

translate called 4

!

voice translation-profile CXS-ORI-new

!

!

call-history-mib retain-timer 500

!

controller E1 0/0/0

pri-group timeslots 1-31

!

controller E1 0/0/1

shutdown

!

!

interface FastEthernet0/0

ip address --omitted--

ip directed-broadcast

duplex full

speed 100

no keepalive

h323-gateway voip interface

h323-gateway voip bind srcaddr (GW1-IPAddress)

!

interface FastEthernet0/1

no ip address

shutdown

duplex auto

speed auto

!

interface Serial0/0/0:15

no ip address

isdn switch-type primary-net5

isdn overlap-receiving T302 3000

isdn incoming-voice voice

isdn sending-complete

no cdp enable

!

ip classless

ip route 0.0.0.0 0.0.0.0 ---IPAddress Omitted----

!

control-plane

!

!

voice-port 0/0/0:15

translation-profile incoming CXS-ORI

cptone DE

!

!

sccp local FastEthernet0/0

sccp ccm (Subscriber CCM-IP-Address) identifier 2

sccp ccm (Publisher CCM-IP-Address) identifier 1

sccp

!

sccp ccm group 1

bind interface FastEthernet0/0

associate ccm 2 priority 2

associate ccm 1 priority 1

associate profile 1 register MTP00137F...

!

dspfarm profile 1 transcode

description TRANSCODE

codec g711ulaw

codec g711alaw

codec g729ar8

codec g729abr8

codec gsmfr

maximum sessions 12

associate application SCCP

!

dial-peer cor custom

!

!

!

dial-peer voice 1 pots

translation-profile incoming CXS-ORI-new

destination-pattern 0.T

progress_ind setup enable 3

progress_ind alert enable 8

progress_ind progress enable 8

progress_ind connect enable 8

direct-inward-dial

port 0/0/0:15

!

dial-peer voice 10 voip

destination-pattern ...

modem passthrough nse codec g711ulaw

voice-class codec 1

voice-class h323 1

session target ipv4:(PublisherCCM-IPAddress)

incoming called-number .

dtmf-relay h245-alphanumeric

fax rate disable

ip qos dscp cs7 media

no vad

!

dial-peer voice 20 voip

preference 1

destination-pattern ...

modem passthrough nse codec g711ulaw

voice-class codec 1

voice-class h323 1

session target ipv4:(Subscriber-CCM-IPAddress)

incoming called-number .

dtmf-relay h245-alphanumeric

fax rate disable

ip qos dscp cs7 media

no vad

!

Bronze

Re: One Way Voice (CCM-<H.323 Gateway)

Hi,

We had the same issue and in our case also we had transcoding sessions running.This turned out to be a bug with one of the 12.3 code and Cisco suggested us to change the transcoding sessions to multiples of 8.So it is 8 or 16.Try to change the transcoding sessions to 8 and see if it helps.

HTH

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