Office 365 is the newest Microsoft service offering online versions of Microsoft software in the Cloud and all resources for effective work: business class e-mail on the Exchange Server, SharePoint Portal, Office 2010 and Lync-Online.
Despite the wide variety of functionality available in Lync-Online, Lync as a cloud solution has a number of limitations, which does not allow its full integration with telephony and to replace or extend the functionality of PBX. As a solution of this problem we suggest replacing Lync Online with Lync On-premise fully integrated with Office 365.
Technical specification of implementation
Installation of Lync On-premise is realized on client's servers or in data center (colocation). Public SIP provider connects to the deployed infrastructure and allows connection with PSTN.
At least 3 virtual machines are required for the implementation. If SIP-provider cannot receive SIP-traffic through TCP, it is required to install additional physical or virtual VoIP-gateway.
Requirements for virtual machines (for 20 users):
Virtual machines can be placed on any of the popular hypervisors, VMware ESXi, Microsoft Hyper-V, Citrix XenServer.
For implementation of Lync On-premise, a certificate from a 3rd party certificate authority is essential. For example, Goddady, DigiCert, VeriSign, Commodo.
Requirements to licenses
Plan E4 Office 365 covers all the required clients’ licenses, including extended/updated Enterprise CAL and Plus CAL. Only following server licenses needs to be purchased:
Replacement of Lync-online cloud by On-premise allows complete integration of the local telephony with unified communications system. It permits to abandon office PBX in favor of the next-generation platform. Implementation of this solution lets the companies not only to expand their business potential, but also to use the following unique features:
Any company can combine the benefits of cloud-enabled services and On-Premise technology to get the most effective infrastructure in terms of business requirements.