6900 phones connecting via an MBG and they show 'call failed' when the call is answered. It could be that you have only partially configured SRTP for remote phones.


  • If you do not require SRTP on remote phones, then disable the 'Use Remote SRTP' setting within the application suite configuration.


  • If you do require SRTP on remote phones, then please ensure you have configured both the application suite and MBG to use SRTP as described in the following link:


Teleworker provisioning documentation