/mcp© 2020 Cisco Systems, Inc. All rights reserved. Important notices, privacy statements, and trademarks of Cisco Systems, Inc. can be found on cisco.com Page 6 of 50 System Components Hardware Requirements • Cisco UBE on Cisco ISR 4331 router • CUCM cluster on UCS C240, 1 Publisher node and 1 Subscriber nodes • Generic Cisco IP-Phones Software Requirements • CUBE-Version: 12.7.0 running IOS-XE 16.12.02 • CUCM UCOS 12.5.1.11900-146 for 1 Publisher and 1 Subscriber Features Features Supported • Incoming and outgoing off-net calls using G711ulaw • Call Conference • CPE Voice Mail support • Call hold & Resume with and without MOH • Unattended and Attended Call transfer • Call forward (all, busy and no answer) • DTMF (RFC2833) • Fax (g711ulaw pass-through) • IP-PBX Calling number privacy • High Availability Features Not Supported • Cisco UCM does not support Blind Call transfer Caveats • Caller ID is not updated on attended and unattended transfer scenarios. • Only one IP PBX used for the testing. • Sparklight does not supports T.38 fax. • The codec priority of inbound calls are G711A Law and G711U Law. G729 is neither offered as a preferred codec nor available in the codec list of the incoming INVITE from PSTN