[cisco-voip] No ring back Tone For Switched off Mobile

[Adam Frankel]

If you used MTP required, you'll need to ensure that a G711 MTP is in 
the MRGL of the SIP Trunk and the trunk is reset.  All IPVMS ("built 
in") MTP's support G711.  If that call's still not working, you'll need 
to analyze CCM traces and potentially SIP message traces on the trunk.

http://www.cisco.com/c/en/us/td/docs/voice_ip_comm/cucm/service/9_0/admin/CUCM_BK_C136FE37_00_cisco-unified-serviceability-administration-90/CUCM_BK_C136FE37_00_cisco-unified-serviceability-administration-guide_chapter_011.html

Servers -> all
Service Group -> Cisco Unified Unified CM
Service -> Cisco CallManager


--
Adam



On 5/24/2016 4:08 AM, Asim Mekki Basheer wrote:
> i have added the below cmd but still not working ( MTP) not checked
>
>
> Regards
>
>
>
> ------------------------------------------------------------------------
> Subject: Re: [cisco-voip] No ring back Tone For Switched off Mobile
> To: sreenara at cisco.com; asim_323 at hotmail.com
> CC: cisco-voip at puck.nether.net
> From: adamgfrankel at gmail.com
> Date: Mon, 23 May 2016 12:25:48 -0400
>
> Also ->
> -Enable Early Offer (MTP if needed) on the SIP profile (CUCM 8.5+) or 
> Effort Early Offer (no MTP) on the SIP Profile (CUCM 10.5+)
> http://www.cisco.com/c/en/us/td/docs/voice_ip_comm/cucm/rel_notes/10_5_1/CUCM_BK_CE15D2A0_00_cucm-release-notes-1051/CUCM_BK_CE15D2A0_00_cucm-release-notes-1051_chapter_01.html#CUCM_TP_B8E6026A_00
>
> -MTP Required (any version)
>     MTP Required limits you to a single codec in the outbound offer 
> and ties your max permitted calls to the number of MTP Resources in 
> your MRGL.
>
> Sreekanth's suggestion is the simplest to fix your specific problem, 
> but early offer usually works better overall with most Service providers.
>
> HTH,
> --
> Adam
>
> On 5/23/2016 11:23 AM, Sreekanth Narayanan (sreenara) wrote:
>
>     This happens when the CUBE receives the prompt from the ITSP over
>     RTP and is not aware of where it has to stream this prompt because
>     CUCM does Delayed Offer by default. So Cube doesnt have the
>     phone's IP address.
>
>     You can fix this by forcing CUCM to send provisional
>     acknowöedgement by:
>     1. putting voice-class sip rel1xx require "100rel" on the dial
>     peers facing CUCM, and
>     2. Under sip profile of sip trunk facing CUBE, change the Rel1xx
>     parameter to Send Prack for all 1xx messages.
>
>
>
>     Sreekanth
>
>     Sent from a phone.
>
>
>     -------- Original message --------
>     From: Asim Mekki Basheer <asim_323 at hotmail.com>
>     <mailto:asim_323 at hotmail.com>
>     Date: 5/23/16 4:37 PM (GMT+05:30)
>     To: cisco-voip at puck.nether.net <mailto:cisco-voip at puck.nether.net>
>     Subject: [cisco-voip] No ring back Tone For Switched off Mobile
>
>     Hi
>
>
>     The issue is, when call out to a Switched off mobile phone, the IP
>     Phone can't hear the correct ringback tone either Busy Tone nor
>     Service Provider's Ringtone, it hears normal Ringback tone same as
>     when the mobile phone switched on instead
>
>     The call flow:
>
>     IP Phone -- CUCM -- SIP Trunk--  CUBE --SIP Trunk -- Service
>     Provider .
>
>
>     (CUCM 7.5,  VGW (2921)
>
>
>     Regards
>
>
>
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>
>

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