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

[Adam Frankel]

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>
> Date: 5/23/16 4:37 PM (GMT+05:30)
> To: 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
>
>
>
> _______________________________________________
> cisco-voip mailing list
> cisco-voip at puck.nether.net
> https://puck.nether.net/mailman/listinfo/cisco-voip

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