SIP REFER with CVP Standalone and VVB

[vLoz]

Hi,

I've been working to achieve SIP REFER transfer with attached data over User-to-User SIP Header by two approaches:

1. Using Subdialog Return as described in Configuration Guide but I was not able to get working SIP REFER with the described method. And also I was not able to add custom data (whitout VVB I was able to make it work by adding a SIP Translation Profile).

https://www.cisco.com/c/en/us/td/docs/voice_ip_comm/cust_contact/contact_center/customer_voice_portal/12-6-2/configuration/guide/ccvp_b_1262-configuration-guide-for-cisco-unified-customer-voice-portal/ccvp_m_1252-vxml-server-configuration.html#CCVP_T... 

Previous Implementation without VVB:

voice class sip-profiles 100
    request REFER sip-header Refer-To modify "sip:(.*)u(.*)@(.*)" "sip:\1@mydomain.com.mx?User-To-User=04c8\2;encoding=hex"

2. Using the custom cell (GatewayTransfer wiht bridged=false) provided by Paul Tindall but the call remains at ingress Gw until the call is finished. 

https://community.cisco.com/t5/contact-center/vxml-app-to-parse-all-sip-headers/m-p/4520440/highlight/true#M12566

Any suggestions?

Greetings, Vladimir Lozano