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New Member

CallTransfer g.729 to g.711 PSTN

Greetings!

Basically I'm having a problem with Call Transfer between IPphones to PSTN.

So if someone has already experienced this problem or some point in particular to check and can help me I'll be very grateful.

1 = The network has a gatekeeper

2 = HQ and Branch Offices, uses G.729 Codec

Problem:

When the IPPhone 7002 makes a call to the HQ in 7001, and asks to be transferred to a

number of PSTN (7777 8888), the call drops.

The phone 7777 8888 receives the signaling, rings, the caller

hears the ringback tone but when the destination picks up the phone the stream does not close.

Topology is attached.

1 ACCEPTED SOLUTION

Accepted Solutions
New Member

Re: CallTransfer g.729 to g.711 PSTN

Tks For all!!! I got it! I solve the problem changing the Call Classification parameter on the trunk configuration settings page from Callmanager to "OFFNet". The gatekeeper now not send me a Release_Comp message.

The help page show this:

Call Classification:

This parameter determines whether an incoming call through this trunk is considered off the network (OffNet) or on the network (OnNet).

When the Call Classification field is configured as Use System Default, the setting of the Cisco Unified Communications Manager clusterwide service parameter, Call Classification, determines whether the trunk is OnNet or OffNet.

This field provides an OnNet or OffNet alerting tone when the call is OnNet or OffNet, respectively. The alerting tones are provided by Cisco Unified Communications Manager Annunciators.

Use this parameter in conjunction with the settings on the Route Pattern Configuration window to classify an outgoing call as OnNet or OffNet.

Thanks Again!!

9 REPLIES
Cisco Employee

Re: CallTransfer g.729 to g.711 PSTN

do you have XCODERs to do that?? PSTN is G711 but the stream you have is G729 so someone needs to change the stream

HTH

java

if this helps, please rate

HTH

java

if this helps, please rate

www.cisco.com/go/pdi
New Member

Re: CallTransfer g.729 to g.711 PSTN

Yes! I work with him and the both voice gateways have xcodes . Look the sh run and debug h225 on the appended files.

The show version:

L_VG_11_01#sh version

Cisco IOS Software, 3800 Software (C3825-IPVOICEK9-M), Version 12.4(22)T, RELEASE SOFTWARE (fc1)

Technical Support: http://www.cisco.com/techsupport

Copyright (c) 1986-2008 by Cisco Systems, Inc.

Compiled Fri 10-Oct-08 06:44 by prod_rel_team

ROM: System Bootstrap, Version 12.4(13r)T, RELEASE SOFTWARE (fc1)

FL_VG_11_01 uptime is 5 weeks, 6 days, 22 hours, 3 minutes

System returned to ROM by bus error at PC 0x6174C344, address 0xE5AE0000 at 13:20:47 UTC Wed Nov 12 2008

System restarted at 13:22:43 UTC Wed Nov 12 2008

System image file is "flash:c3825-ipvoicek9-mz.124-22.T.bin"

This product contains cryptographic features and is subject to United

States and local country laws governing import, export, transfer and

use. Delivery of Cisco cryptographic products does not imply

third-party authority to import, export, distribute or use encryption.

Importers, exporters, distributors and users are responsible for

compliance with U.S. and local country laws. By using this product you

agree to comply with applicable laws and regulations. If you are unable

to comply with U.S. and local laws, return this product immediately.

A summary of U.S. laws governing Cisco cryptographic products may be found at:

http://www.cisco.com/wwl/export/crypto/tool/stqrg.html

If you require further assistance please contact us by sending email to

export@cisco.com.

Cisco 3825 (revision 1.1) with 224256K/37888K bytes of memory.

Processor board ID FTX1104A025

2 Gigabit Ethernet interfaces

8 Channelized/Clear E1/PRI ports

DRAM configuration is 64 bits wide with parity enabled.

479K bytes of NVRAM.

62720K bytes of ATA System CompactFlash (Read/Write)

Configuration register is 0x2102

New Member

Re: CallTransfer g.729 to g.711 PSTN

Look this:

FL_VG_11_01#sh dspfarm all

Dspfarm Profile Configuration

Profile ID = 1, Service = TRANSCODING, Resource ID = 1

Profile Description :

Profile Service Mode : Non Secure

Profile Admin State : UP

Profile Operation State : ACTIVE

Application : SCCP Status : ASSOCIATED

Resource Provider : FLEX_DSPRM Status : UP

Number of Resource Configured : 24

Number of Resource Available : 24

Codec Configuration

Codec : g711ulaw, Maximum Packetization Period : 30

Codec : g711alaw, Maximum Packetization Period : 30

Codec : g729r8, Maximum Packetization Period : 60

Codec : g729br8, Maximum Packetization Period : 60

Codec : g729ar8, Maximum Packetization Period : 60

Codec : g729abr8, Maximum Packetization Period : 60

Codec : g723r63, Maximum Packetization Period : 60

Codec : g723r53, Maximum Packetization Period : 60

I've very transcoding available.!

But the gateways should only to negociate codec and no need to use transcoding, right?

New Member

Re: CallTransfer g.729 to g.711 PSTN

Could you please post your H323 GW config on your CallManager?

New Member

Re: CallTransfer g.729 to g.711 PSTN

It follows in annex the configurations of the gatekeeper in the callmanager. I see on the trace files wich the gatekeeper send me a H225 RELEASE_COMP and the my gateways answer with the same message. I've the TranslatorX to see the trace files, and show me this:

Inbound H225 RELEASE_COMP message from 198.207.88.10 at timestamp 12/24/2008 10:46:23.560

RELEASE_COMP, pd = 8, callref = 0x3ECD, Message Size = 52 bytes

Cause i = 0x8EC1 - Bearer capability not implemented

User-User, i = 0x0525C0060008914A0004588808110035790FC0D0F811DD9015DF8CB867E2E1047000000010800100

Entire Message:

010: 08 02 3E CD 5A 08 02 8E C1 7E 00 28 05 25 C0 06

020: 00 08 91 4A 00 04 58 88 08 11 00 35 79 0F C0 D0

030: F8 11 DD 90 15 DF 8C B8 67 E2 E1 04 70 00 00 00

040: 10 80 01 00

New Member

Re: CallTransfer g.729 to g.711 PSTN

Hi there,

this is clearly a trancoding problem. There must be enough transcoding resources in order to complete what you want.

New Member

Re: CallTransfer g.729 to g.711 PSTN

How many DSP's does a transcoder need to perform the process? It shows here that there are 24 resources available with 24 configured.

Re: CallTransfer g.729 to g.711 PSTN

it is transcoding issue

if u wanna make sure

put those tow phone in one region and make the codec between them as g711

and make a dial a voip dial peer that match 77788 the number u call for test as voip dial-peer and its codec g711

this way u will make end to end g711 call and test it or u can just apply the codec calss u have enough

dsp required for each call with defrent codecs but not between ip phones because cisco ip phone has builting dsp for this issue

but for case like over WAN then terminate on a gateway or voicemail server this way u need dsp resources

each dsp chip can handel 4-5 Xcoding calls

for example pvdm 64 has four chips 4 then u can hav about 16 to 20 call just use cisco dsp calculator on cisco website

good luck

hope this helps

New Member

Re: CallTransfer g.729 to g.711 PSTN

Tks For all!!! I got it! I solve the problem changing the Call Classification parameter on the trunk configuration settings page from Callmanager to "OFFNet". The gatekeeper now not send me a Release_Comp message.

The help page show this:

Call Classification:

This parameter determines whether an incoming call through this trunk is considered off the network (OffNet) or on the network (OnNet).

When the Call Classification field is configured as Use System Default, the setting of the Cisco Unified Communications Manager clusterwide service parameter, Call Classification, determines whether the trunk is OnNet or OffNet.

This field provides an OnNet or OffNet alerting tone when the call is OnNet or OffNet, respectively. The alerting tones are provided by Cisco Unified Communications Manager Annunciators.

Use this parameter in conjunction with the settings on the Route Pattern Configuration window to classify an outgoing call as OnNet or OffNet.

Thanks Again!!

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