ILBC calls via SIP Trunk with CUBE and CUCM7

Unanswered Question
Mar 13th, 2010

hi there,

our SIP Provider offers the IBLC codec which promises to provide better quality compard to G.729.

I'm using this scenario:

IP-Phone(G711) --- CUCM7 --- (SIP-Trunk1) --- CUBE --- (SIP-Trunk2) --- Provider

Everything workes unless I'm configuring IBLC at the provider and on trunk2.

I have the CUBE router acting as a trancoding device and also specified IBLC as codec to be handled.

SIP trunk 2 was placed in a region with IBLC as codec.

On the trunk configuration in CUCM the media ressource group with XCODE capability is configured

Transcoding workes between two IP Phones in different regions with different codecs within the intranet.

Unfortunately the CUBE router doesn't seem to use the transcoder to change internal G711u calls into IBLC codec

so calls are blocked by the CUBE device:

------------------------------------------------------

deb ccsip calls

for incoming call:

.Mar 13 17:43:17.231: //145/BDB403DD8134/SIP/Call/sipSPICallInfo:
The Call Setup Information is:
Call Control Block (CCB) : 0x4AE7AC98
State of The Call        : STATE_DEAD
TCP Sockets Used         : NO
Calling Number           : 0237892992
Called Number            : 036677725231
Source IP Address (Sig  ): 10.100.100.50
Destn SIP Req Addr:Port  : <IP SIP Provicer>
Destn SIP Resp Addr:Port : <IP SIP Provicer>:5060
Destination Name         : <IP SIP Provicer>

.Mar 13 17:43:17.231: //145/BDB403DD8134/SIP/Call/sipSPIMediaCallInfo:
Number of Media Streams: 1
Media Stream             : 1
Negotiated Codec         : ilbc
Negotiated Codec Bytes   : 0
Nego. Codec payload      : 255 (tx), 255 (rx)
Negotiated Dtmf-relay    : 6
Dtmf-relay Payload       : 101 (tx), 101 (rx)
Source IP Address (Media): <IP CUBE>
Source IP Port    (Media): 0
Destn  IP Address (Media): <IP SIP Provicer>
Destn  IP Port    (Media): 22022
Orig Destn IP Address:Port (Media): [ - ]:0

.Mar 13 17:43:17.231: //145/BDB403DD8134/SIP/Call/sipSPICallInfo:
Disconnect Cause (CC)    : 65
Disconnect Cause (SIP)   : 488

(Output lookes similar to outgoing calls)

------------------------------------------------------

I set up ccm on cube and assigned dsp ressources without success:

Here are the relevant configuration parts:

------------------------------------------------------

voice class codec 1
codec preference 1 iblc

voice service voip
address-hiding
allow-connections sip to sip

allow-connections h323 to sip
allow-connections sip to h323
fax protocol t38 ls-redundancy 0 hs-redundancy 0 fallback cisco

h323
sip
  header-passing error-passthru
  no update-callerid
  midcall-signaling passthru
  privacy-policy passthru
!

voice-card 0
dspfarm
dsp services dspfarm

dial-peer voice 40991 voip
description *** Incoming from SIP-Provider
destination-pattern 03667772523.%
session protocol sipv2
session target ipv4:<IP_of_CUCM>
voice-class codec 1
voice-class sip asserted-id pai
voice-class sip privacy-policy passthru
dtmf-relay rtp-nte
fax-relay sg3-to-g3
fax rate 14400
fax protocol t38 ls-redundancy 0 hs-redundancy 0 fallback cisco
ip qos dscp cs5 media
ip qos dscp cs5 signaling

sccp local GigabitEthernet0/0

sccp ccm 10.100.100.50 identifier 11 version 4.1
sccp

sccp ccm group 11
description *** lokaler CCM fuer Codec-Konvertierung von SIP/DUS.NET
associate ccm 11 priority 1
associate profile 21 register DE_WGT_MTP02

dspfarm profile 21 transcode
codec g711ulaw
codec g711alaw
codec g729ar8
codec g729abr8
codec g729r8
codec ilbc
maximum sessions 10
associate application SCCP

telephony-service
sdspfarm units 1
sdspfarm transcode sessions 10
sdspfarm tag 1 DE_WGT_MTP02
max-ephones 30
max-dn 30
ip source-address 10.100.100.50 port 2000
max-conferences 8 gain -6
transfer-system full-consult
create cnf-files version-stamp 7960 Mar 14 2010 02:10:34

------------------------------------------------------

sh sccp

SCCP Admin State: UP
Gateway Local Interface: GigabitEthernet0/0
        IPv4 Address: 10.100.100.50
        Port Number: 2000
IP Precedence: 5
User Masked Codec list: None
Call Manager: 10.100.100.50, Port Number: 2000
                Priority: N/A, Version: 4.1, Identifier: 11
                Trustpoint: N/A
Call Manager: 10.1.1.55, Port Number: 2000
                Priority: N/A, Version: 7.0, Identifier: 10
                Trustpoint: N/A

Transcoding Oper State: ACTIVE - Cause Code: NONE
Active Call Manager: 10.100.100.50, Port Number: 2000
TCP Link Status: CONNECTED, Profile Identifier: 21
Reported Max Streams: 20, Reported Max OOS Streams: 0
Supported Codec: g711ulaw, Maximum Packetization Period: 30
Supported Codec: g711alaw, Maximum Packetization Period: 30
Supported Codec: g729ar8, Maximum Packetization Period: 60
Supported Codec: g729abr8, Maximum Packetization Period: 60
Supported Codec: g729r8, Maximum Packetization Period: 60
Supported Codec: ilbc, Maximum Packetization Period: 120
Supported Codec: rfc2833 dtmf, Maximum Packetization Period: 30
Supported Codec: rfc2833 pass-thru, Maximum Packetization Period: 30
Supported Codec: inband-dtmf to rfc2833 conversion, Maximum Packetization Period: 30

sh dspfarm dsp all
SLOT DSP VERSION  STATUS CHNL USE   TYPE    RSC_ID BRIDGE_ID PKTS_TXED PKTS_RXED

0    1   26.3.4   UP     N/A  FREE  xcode  1      -         -         -
0    1   26.3.4   UP     N/A  FREE  xcode  1      -         -         -
0    2   26.3.4   UP     N/A  FREE  xcode  2      -         -         -
0    2   26.3.4   UP     N/A  FREE  xcode  2      -         -         -
0    2   26.3.4   UP     N/A  FREE  xcode  2      -         -         -
0    2   26.3.4   UP     N/A  FREE  xcode  2      -         -         -
0    2   26.3.4   UP     N/A  FREE  xcode  2      -         -         -
0    2   26.3.4   UP     N/A  FREE  xcode  2      -         -         -
1    1   26.3.4   UP     N/A  FREE  xcode  1      -         -         -
1    1   26.3.4   UP     N/A  FREE  xcode  1      -         -         -
1    1   26.3.4   UP     N/A  FREE  xcode  2      -         -         -
1    1   26.3.4   UP     N/A  FREE  xcode  2      -         -         -
1    1   26.3.4   UP     N/A  FREE  xcode  2      -         -         -
1    1   26.3.4   UP     N/A  FREE  xcode  2      -         -         -

Thanks in advance,

David

I have this problem too.
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karen.cheng@rac... Mon, 07/19/2010 - 05:37

Hi there,

Just wondering whether you ever got this resolved? I seem to have a very similiar problem.

Regards

Karen

domjahn Tue, 07/20/2010 - 00:49

Hi Karen,

not yet.

We changed the codec to G729 which workes fine.

Regards,

David

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Posted March 13, 2010 at 9:48 AM
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