Call-Forward issues on SIP Trunk

[kiranoddiraju]

Hello Experts,

We have an issue with Call-Forwards on our CUCM10.5 and SIP Trunk to Telco. This was discussed few times before and I have followed the suggestions and changed the Service parameters but my issue persists.  

Here is the scenario:

User-A on IP Phone 0207-111-1111

User-A forwards his Phone to 077-222-2222

When User B 078-333-3333 calls User A on 0207-111-1111, the caller ID on User A's Mobile phone is displayed as 0207-111-1111 instead of 078-333-3333. We need User-B's CLI 078-333-3333 displayed as the calling number.

On the SIP Trunk to Telco I have:

Calling Party Selection - set to 'First Redirected Number (External)'.

Calling Line ID Presentation set to Allowed

"Redirecting Number IE Delivery - Outbound" is checked

Service Parameters:

Always Display Original Dialed Number - set to False

'Retain Forward Information' - set to True

Thanks,

Kiran Oddiraju

[yahsiel2004]

Is the SIP Trunk going directly to the Telco or to a CUBE?

Regards,

Yosh

[kiranoddiraju]

Hi Yosh

SIP Trunk to Telco is directly terminated on the CUCM. No CUBE involved here.

Thx

KO

[Atul Gaba]

Take a set of CCM trace for a test call and check the invite going out to the Telco to verify if you are sending the right information to the Telco. If not then there must be some masking happening before the call is routed out the SIP trunk.

It could also be the case where the Telco masks CLID for all calls from your site with the DID assigned to the site.

HTH,

Atul

[Mohammed al Baqari]

Hi,

Is this number (0207-111-1111) configured as DN or external number mask? If it is configured as DN, you need to select First Redirect Number on the SIP trunk instead of First Redirect Number (External)

[kiranoddiraju]

0207-111-1111 is the External Phone number mask not DN.

[Wilson Samuel]

Hi Kiran,

Could you please enable the following parameter and see

Always Display Original Dialed Number - set to True

It looks like the carrier is not retaining the RDNIS

Please let us know if it makes any difference

Regards

[kiranoddiraju]

Hi Wilson,

Tried that parameter but didn't help.

Thx

KO

[Jagpreet Barmi]

Hi Kiran,

Correct me if I didn't get the issue correctly.

Call flow:

User B (078-333-3333) calls User A (0207-111-1111)  --> CFA to User A Mobile (077-222-2222).

In this scenario, User B becomes the calling party, User A becomes the Redirecting Party and Mobile number becomes the called party.

Under the SIP Trunk, the Calling Party Selection - should be set to 'Originator' to display the calling party as User B (078-333-3333).

HTH,

Jagpreet Singh Barmi

[kiranoddiraju]

Hi Jagpreet,

Tried the 'Originator' already but doesn't work.

Thanks

[Brian Meade]

Change it to Originator and un-check "Redirecting Number IE Delivery - Outbound".

Sometimes you will see the diversion header displayed on cell phones rather than the calling number.

[will.alvord]

Sounds like a diversion header is needed. You might be able to do this in call manager via a normalization script but in cube for sure. 

Edit: sorry. Just saw that you don't have cube. A quick Google fount this - https://wiklunds.wordpress.com/2012/01/25/sip-normalization-script-for-diversion-header/

[kiranoddiraju]

It looks like Sip normalization script is not available on CUCM 8.0.3

[will.alvord]

"We have an issue with Call-Forwards on our CUCM10.5 and SIP Trunk to Telco."

"It looks like Sip normalization script is not available on CUCM 8.0.3"

I'm confused.

[kiranoddiraju]

Will,

Apologies, that was typo in my original email. The current version is CUCM version 8.0.3 and we are migrating to CUCM10.5. The issue is on CUCM8 since we migrated from traditional PRI circuits to a centralised SIP Trunk.

Thanks