Limitations

•Only CuCM version 12.0.1.21900-7 or later is supported

•This feature is only supported with redundancy mode “CuCM Session Pesistency”

•This feature is only available for turrets with XMA2 and soft turret using only DDI lines

•Video call is not supported

•Group Intercom: all TPO involved must be configure to support secure communication

•Direct intercom is supported but the call is in no secure mode (voice and signaling are not encrypted)

•FlexGo is not supported

•Only support Session Persistency as TPO redundancy mode

•T3MH is not supported

•Cisco Survivable Remote Site Telephony (SRST) is not supported

•Several active nodes in a cluster: these nodes except the Alpha node may needed an additional reboot to complete the client certificates operations (creation/deletion).

•When new Cisco devices are fetched on TSS,  TPO cluster must be rebooted in order to create the associate client certificates and then to use them.

•DDI to DDI calls may not be correctly restored by the TPO redundancy mechanism

•Ongoing incoming calls may not be correctly restored by the TPO redundancy mechanism

•Only two cipher options (set in CUCM Enterprise Parameters) are supported by the TPO, "All Ciphers RSA Preferred" or "All Ciphers ECDSA Preferred".  All Medium / Strong cipher suit options are not supported by the TPO.