Intercom between on-prem 8851 and off-prep MRA 8851

[jairreal8]

Hi all,

My company is trying to configure intercom to work between an on-prem 8851 phone and an off-prep 8851 phone registered through MRA/Expressways. 

The off-prep MRA 8851 is able to successfully intercom to the on-prem 8851 and two-way audio is possible once the on-prem 8851 accepts the intercom request. However, when the on-prem 8851 tries to intercom to the off-prep MRA 8851, a message is heard immediately saying "this call cannot be completed as dialed" and a 404 not found error is seen in log.

Has anyone been able to make this work or have any ideas to try? 

[Vaijanath Sonvane]

Hi,

As per Cisco Expressway Release Note (X8.11.4), the intercom support is available over MRA for IP Phones that support this feature. I hope you are using Expressway Release X8.11.4 or later. Also, please make sure you have configured correct Partition (including Directory URI Partition) and CSS for Intercom feature.