Extension Mobility and SRST ?

Hi all,


Could you please let me know if it is possible to fallback in SRST at the local gateway on a branch site (BR1), if you are logged in with Extension Mobility against the CUCM cluster at HQ site (that is, over the WAN, which failed).


Best regards,



  • You should fallback to SRST, the phone will tell the SRST router what DN it is currently using. However, your wont be able to login or logout of extension mobility since the EM service resides on CUCM across the WAN.

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