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New Member

Missing Config Perhaps

Hi,

Incoming calls to a Cisco Phone CFwdAll to Cisco Unity (A Different Region/Location G.729br8) were dropping on the H323 2821 Voice Gateway Router.

I have configured our Voicemail Device Pool to use a Region that connects to all other sites at G.711 and the CFwdAll to Unity is now successful.

I don't understand why this failed before as the voice/voip dial peers were calling the;

voice-class codec 1

voice class codec 1

codec preference 1 g729br8

codec preference 2 g711ulaw

codec preference 3 g711alaw

Am I missing some more config to force the gateway to accept the originally configured G.729br8 codec.

All of our othersites have gateway routers that are MGCP controlled, we have never seen this before, they CFwdAll to Unity at G.729br8 over the WAN.

2 ACCEPTED SOLUTIONS

Accepted Solutions

Re: Missing Config Perhaps

With a PVDM2-32 you should certainly be able to provision transcoding sessions when you are only using 8 voice channels.

If the sessions remaining are 0, then it possible there are other VWICs installed which have used up the remaining channels?

Incidentally, when configuring the DSP resource sharing, make sure that you have specified the appropriate complexity. This depends on whether you are using only G711 or G729 or both which is high complexity.

Here is an example of hardware transcoder:-

voice-card 0

dsp services dspfarm

codec complexity flex

Conferencing/Transcoding commands when used with PVDM2-XX DSPs:

sccp local

sccp ccm 192.168.1.1 identifier 1 version 4.1

sccp ccm 192.168.1.2 identifier 2 version 4.1

sccp

!

sccp ccm group 1

associate ccm 1 priority 1

associate ccm 2 priority 2

associate profile 1 register XCD-NAME

registration retries 20

registration timeout 30

keepalive retries 5

!

dspfarm profile 1 transcode

codec g711ulaw

codec g711alaw

codec g729ar8

codec g729abr8

maximum sessions 2

associate application SCCP

no shut

The XCD-NAME has to be exactly the name that you assign to the enhanced IOS transcoder in CCM, otherwise it will not register.

The identifier version depends on the IOS version. After the version keyword enter ? to list available options, simply select one the matches your CUCM version. If your CCM version is not listed, select the lastest available.

Hope this helps.

Allan.

Pls rate helpful posts.

VIP Super Bronze

Re: Missing Config Perhaps

Kim,

To configure a xcoder on a voice gateway below are the sample commands you need.

The command you are trying to use is for pvdm-12. ie. But what you have is a pvdm2-X

So you should use this..

sccp local GigabitEthernet0/0

sccp ccm 192.168.2.12 identifier 10 version 4.1

sccp

!

sccp ccm group 1

associate ccm 10 priority 1

associate profile 2 register MTP-IPCS3825

associate profile 20 register CFB-IPCS3825

!

dspfarm profile 2 transcode

codec g711ulaw

codec g711alaw

codec g729ar8

codec g729abr8

maximum sessions 4

associate application SCCP

!

dspfarm profile 20 conference

codec g711ulaw

codec g711alaw

codec g729ar8

codec g729abr8

codec g729r8

codec g729br8

maximum sessions 4

associate application SCCP

HTH

Please rate all useful posts "The essence of christianity is not the enthronement but the obliteration of self --William Barclay"
14 REPLIES
Cisco Employee

Re: Missing Config Perhaps

have you enabled G729 in the Unity server?? if not it's under the advanced settings tools.

we recommend not enabling this because it causes overhead on Unity and use XCODERs instead

HTH

java

if this helps, please rate

HTH

java

if this helps, please rate

www.cisco.com/go/pdi
New Member

Re: Missing Config Perhaps

From Unity-SRDN, by default Unity3.1 and later use native transcoding to support both G.711 & G.729 using Unity srv itself CPU resource.

In real situation, we may turn off G.729 support in Unity srv itself:

regedit -> HKEY_LOCAL_MACHINE\SOFTWARE\Active Voice\AvSkinny\DWORD: G729 Enabled = '0'. See tooldepot advance settings for more detail.

Then all transcoding should be done by other resources like: PVDMI/II

For your case,

I think all othersites with MGCP vgw, they have xcoding resources available in their MRTG so they can do xcoding properly, therefore, all G.729 unity calls succeed.

For H323 vgw, you need to add xcoding resource to your ephones, here is the sample:

CME-conf#

voice-card 1

dsp service dspfarm

dspfarm transcode maximum session 2

dspfarm

telephony-service

sdsp tag 1 mtpMacxxxxxxxxx

sdsp unit 1

sdsp transcode session 2

Pls rate if help

James

New Member

Re: Missing Config Perhaps

Hi James,

when I try to enter

dspfarm transcoder maximum sessions

it only allows me " <0-0> Specify the maximum transcoding sessions value"

The 32 PVDM Module is only using timeslots 1-8,16 as this is E1 with 8 channels.

I can't understand why I am unable to borrow the remaining dsp resources from the 22 available.

When I try to add telephony-service I get "Need to remove call-manager fallback config" which I require for resilience.

Re: Missing Config Perhaps

With a PVDM2-32 you should certainly be able to provision transcoding sessions when you are only using 8 voice channels.

If the sessions remaining are 0, then it possible there are other VWICs installed which have used up the remaining channels?

Incidentally, when configuring the DSP resource sharing, make sure that you have specified the appropriate complexity. This depends on whether you are using only G711 or G729 or both which is high complexity.

Here is an example of hardware transcoder:-

voice-card 0

dsp services dspfarm

codec complexity flex

Conferencing/Transcoding commands when used with PVDM2-XX DSPs:

sccp local

sccp ccm 192.168.1.1 identifier 1 version 4.1

sccp ccm 192.168.1.2 identifier 2 version 4.1

sccp

!

sccp ccm group 1

associate ccm 1 priority 1

associate ccm 2 priority 2

associate profile 1 register XCD-NAME

registration retries 20

registration timeout 30

keepalive retries 5

!

dspfarm profile 1 transcode

codec g711ulaw

codec g711alaw

codec g729ar8

codec g729abr8

maximum sessions 2

associate application SCCP

no shut

The XCD-NAME has to be exactly the name that you assign to the enhanced IOS transcoder in CCM, otherwise it will not register.

The identifier version depends on the IOS version. After the version keyword enter ? to list available options, simply select one the matches your CUCM version. If your CCM version is not listed, select the lastest available.

Hope this helps.

Allan.

Pls rate helpful posts.

New Member

Re: Missing Config Perhaps

Hi Allan thanks for looking into this, I had already had the router setup as a xcoder on CCM and registered, when I made test calls the show dspfarm all showed no xcoding sessions and sure enough the call was disconnected,

There is only an E1 Card installed;

Cisco 2821 (revision 53.51) with 251904K/10240K bytes of memory.

Processor board ID FCZ122272GV

2 Gigabit Ethernet interfaces

9 Serial interfaces

1 Channelized E1/PRI port

DRAM configuration is 64 bits wide with parity enabled.

239K bytes of non-volatile configuration memory.

62720K bytes of ATA CompactFlash (Read/Write)

Here is the edited config of my 2821 Router;

card type e1 0 0

!

network-clock-participate wic 0

network-clock-select 1 E1 0/0/0

!

multilink bundle-name authenticated

!

isdn switch-type primary-net5

!

voice class codec 1

codec preference 1 g729br8

codec preference 2 g711ulaw

!

voice class h323 1

h225 timeout tcp establish 4

!

voice translation-rule 1

rule 1 /XXXX/ /XX/

!

voice translation-profile XXXXXXToXXXX

translate called 1

!

voice-card 0

dspfarm

dsp services dspfarm

!

call-history-mib retain-timer 500

call-history-mib max-size 500

!

controller E1 0/0/0

pri-group timeslots 1-8,16

description XXXXXXXXX DDi

!

interface GigabitEthernet0/0

description VOICE_GATEWAY$ETH-LAN$

ip address XXX.XXX.XXX.XXX 255.255.255.0

duplex auto

speed auto

h323-gateway voip bind srcaddr XXX.XXX.XXX.XXX

!

interface Serial0/0/0:15

no ip address

encapsulation hdlc

isdn switch-type primary-net5

isdn overlap-receiving

isdn incoming-voice voice

isdn send-alerting

no cdp enable

!

voice-port 0/0/0:15

translation-profile incoming XXXXXXToXXXX

!

dial-peer voice 10 voip

preference 1

destination-pattern XX..

voice-class codec 1

voice-class h323 1

session target ipv4:XXX.XXX.XXX.XXX

dtmf-relay h245-alphanumeric

no vad

!

dial-peer voice 11 voip

preference 2

destination-pattern XX..

voice-class codec 1

voice-class h323 1

session target ipv4:XXX.XXX.XXX.XXX

dtmf-relay h245-alphanumeric

no vad

!

dial-peer voice 20 pots

destination-pattern 9.T

direct-inward-dial

port 0/0/0:15

!

dial-peer voice 21 pots

destination-pattern 9...........

direct-inward-dial

port 0/0/0:15

!

dial-peer voice 22 pots

destination-pattern 9......

direct-inward-dial

port 0/0/0:15

!

dial-peer voice 23 pots

destination-pattern 9............

direct-inward-dial

port 0/0/0:15

!

dial-peer voice 24 pots

destination-pattern 999

direct-inward-dial

port 0/0/0:15

!

call-manager-fallback

secondary-dialtone 9

max-conferences 8 gain -6

transfer-system full-consult

timeouts interdigit 4

ip source-address XXX.XXX.XXX.XXX port 2000

max-ephones 48

max-dn 48

system message primary XXXXXXX

time-zone 21

time-format 24

date-format dd-mm-yy

Kim

New Member

Re: Missing Config Perhaps

I have verified the setup in my environment and got it working.

Points here:

********************

1. Since this site phones been controller by local H323 vgw, they need local dsp xcode resource to do the job but no from CCM.

2. Ensure local DSP resource still exist for xcoding capability.

To verify:

********************

cmd: show voice dsp <-- To see if has dsp resource available.

For my T1 2/0 port, I assign D-channel 1-17 to pri-group, so I have 1 DSP chip available.

The output looks like:

C549 009 04 {medium} 4.4.25 IDLE idle 0 2/1:23 05 0 0/0

C549 009 01 {medium} 4.4.25 IDLE idle 0 0 2/0:23 21 0 0/0

02 {medium} 4.4.25 IDLE idle 0 2/0:23 22 0 0/0

03 {medium} 4.4.25 IDLE idle 0 2/0:23 23 0 0/0

C549 010 01 {medium} 4.4.25 IDLE idle 0 0 2/1:23 06 0 0/0

02 {medium} 4.4.25 IDLE idle 0 2/1:23 07 0 0/0

03 {medium} 4.4.25 IDLE idle 0 2/1:23 08 0 0/0

04 {medium} 4.4.25 IDLE idle 0 2/1:23 09 0 0/0

C549 011 01 {medium} 4.4.25 IDLE idle 0 0 2/1:23 10 0 0/0

02 {medium} 4.4.25 IDLE idle 0 2/1:23 11 0 0/0

03 {medium} 4.4.25 IDLE idle 0 2/1:23 12 0 0/0

04 {medium} 4.4.25 IDLE idle 0 2/1:23 13 0 0/0

C549 012 01 {medium} 4.4.25 IDLE idle 0 0 2/1:23 14 0 0/0

02 {medium} 4.4.25 IDLE idle 0 2/1:23 15 0 0/0

03 {medium} 4.4.25 IDLE idle 0 2/1:23 16 0 0/0

04 {medium} 4.4.25 IDLE idle 0 2/1:23 17 0 0/0

C549 014 01 {medium} 4.4.25 IDLE idle 0 0 2/1:23 01 0 0/0

02 {medium} 4.4.25 IDLE idle 0 2/1:23 02 0 0/0

03 {medium} 4.4.25 IDLE idle 0 2/1:23 03 0 0/0

04 {medium} 4.4.25 IDLE idle 0 2/1:23 04 0 0/0

Note, some D-channels (18 ~ 23) won't consume the DSP resource which in turn free for my next step to assign the DSP resource for xcoding.

If you don't have enough DSP resource, then you may either lower down your D-channel in your E1 or buy extra PVDM DSP module.

Configuraion sample

**********************

sccp

sccp local fa0/1

voice-card 0

dspfarm

dsp services dspfarm

dspfarm transcoder max session 2

dspfarm

call-manager-fallback

sdspfarm tag 1 mtp

sdspfarm unit 1

sdspfarm transcoder session 2

Done!

So it will support your local phone with xcoding capability. Whenever they need to talk to remote Unity with G729 <-> G711 xcoding, it will use the local available dspfarm resource defined above.

BTW, I though you use CME so I give it 'telephony-service'. You can put the dspfarm resource under 'call-manager-fallback' too.

Pls rate if help.

James

New Member

Re: Missing Config Perhaps

Hi James,

I am unable to configure;

dspfarm transcoder max sessions 2

^

% Invalid input detected at '^' marker.

Even though I have configured the PVDM32;

controller E1 0/0/0

pri-group timeslots 1-8,16

I would have expected to be able to create at least 2 x transcoder sessions.

Is there anything I need to configure under;

controller e1 0/0/0?

Regards Kim

VIP Super Bronze

Re: Missing Config Perhaps

Kim,

To configure a xcoder on a voice gateway below are the sample commands you need.

The command you are trying to use is for pvdm-12. ie. But what you have is a pvdm2-X

So you should use this..

sccp local GigabitEthernet0/0

sccp ccm 192.168.2.12 identifier 10 version 4.1

sccp

!

sccp ccm group 1

associate ccm 10 priority 1

associate profile 2 register MTP-IPCS3825

associate profile 20 register CFB-IPCS3825

!

dspfarm profile 2 transcode

codec g711ulaw

codec g711alaw

codec g729ar8

codec g729abr8

maximum sessions 4

associate application SCCP

!

dspfarm profile 20 conference

codec g711ulaw

codec g711alaw

codec g729ar8

codec g729abr8

codec g729r8

codec g729br8

maximum sessions 4

associate application SCCP

HTH

Please rate all useful posts "The essence of christianity is not the enthronement but the obliteration of self --William Barclay"
New Member

Re: Missing Config Perhaps

Hi HTH,

excellent help thanks.

Kim

Re: Missing Config Perhaps

Hi Kim,

In addition to the goodwork by Deji, please refer back to my previous post, which you possibly overlooked the example provided.

Glad that you were able to resolve the problem :)

Regards

Allan.

VIP Super Bronze

Re: Missing Config Perhaps

Allan,

I am sure Kim missed that out.

I do appreciate your great work here and I admire your depth of knowledge.

I believe you are in the UK. I work for NSC Global here in London. May be we can be good buddies!

Please rate all useful posts "The essence of christianity is not the enthronement but the obliteration of self --William Barclay"

Re: Missing Config Perhaps

Thanks for the appreciate Deji :) I wish I had more time to regularly keep posting.. It's a great forum, and you do learn from other posts too.

Best regards

Allan

New Member

Re: Missing Config Perhaps

Thanks to all of you, this forum is exceptional.

Regards Kim

New Member

Re: Missing Config Perhaps

Yes - I forget it is 2821 rtr which should use PVDM II resource other than PVDM I. So my previous sample configure is for PVDM I. For PVDM II, then 2nd sample is good.

Good to know your question been answered!

James

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