How configure Maximum Rate Bit in region setting CUCM11

[oattoumani]

hello

I need a help to fix an fax issue.The DN affected to the fax is configured in a callmanager
Integrated with a trunk SIP to a NativIP server. we cannot send or receiv a fax .

The fax call flow is PSTN--H323-->ISR---->CUCM----/Trunk SIP/-----NativIPFax Server.

Log from ISR voice GW

%VOICE_IEC-3-GW: SIP: Internal Error (2xx, dest sdp null): IEC=1.1.96.7.26.0 on callID 1265870 GUID=283382C8344A11E9BA91682C7BC21EF0
RTH2-GW-RNIS-3#show voice iec description 1.1.96.7.26.0
IEC Version: 1
Entity: 1 (Gateway)
Category: 96 (mandatory ie missing (96))
Subsystem: 7 (SIP)
Error: 26 (2xx, dest sdp null)
Diagnostic Code: 0

Logs from NativIP show a missmatch of maximum rate bit, the fax server send the Maximum rate bit at 9600 and the cisco callmanager send it at 14400. See details in attachment file

I need your assistance to fix in the Region configuration the Maximum rate bit of the Trunk SIP at 9600.

Thanks for your help

regards
Omar

[Chris Deren]

CUCM regions have nothing to do with faxing rates, you can change the fax rate to desired size at the dial-peer level with following command:

fax rate {2400 | 4800 | 7200 | 9600 | 12000 | 14400 | disable| voice}

https://www.cisco.com/c/en/us/td/docs/ios/12_2/voice/configuration/guide/fvvfax_c/vvfpeers.html

[oattoumani]

Hi Chris
Thank for your reply.
I am going to apply your suggestion and I will post the result asap.
Regards
Omar

[oattoumani]

Hello Chris

I apply the fax rate 9600 as you suggest but the issue is not resolved.

In the logs from RTMT , in the SIP call process there is an error “488 not acceptable media” between the GvoixISR and the Trunk SIP on CUCM.

Here the trace:

Message Details

SENDER: 10.172.152.9

GUID: ec325080-c7616c2e-1f9ef7-998ac0a@10.172.152.9

MSG_LABEL: 488 Not Acceptable Media

RECEIVER: [Trunk_NATIVIP] 10.172.53.117

MAC_ADDRESS: Trunk_NATIVIP

MSGTAG: 90054094

MSG_TYPE: UCM_CTRACE

CORRELATIONID: 2,100,10,1.1276356^10.188.225.4^*

TIMESTAMP: 2019/02/27 11:53:38.187

Detailed Sip Message

SIP/2.0 488 Not Acceptable Media

Via: SIP/2.0/UDP 10.172.53.117;rport;branch=z9hG4bKaXyFeQ3HcaHUr

From: < sip:53846@10.172.53.117> ;tag=QS9QDK1N1540D

To: < sip:+33155668585@10.172.152.9> ;tag=31010742~ac383807-d406-4657-81ed-184939d61707-36318821

Date: Wed, 27 Feb 2019 10:53:38 GMT

Call-ID: ec325080-c7616c2e-1f9ef7-998ac0a@10.172.152.9

CSeq: 1078617 INVITE

Allow-Events: presence, kpml

Server: Cisco-CUCM11.5

P-Asserted-Identity: < sip:+33155668585@10.172.152.9>

Remote-Party-ID: < sip:+33155668585@10.172.152.9> ;party=called;screen=yes;privacy=off

Contact: < sip:+33155668585@10.172.152.9:5060>

Content-Length: 0

If you have idea thank for your help:

Regards

Omar