How i can deploy Microsoft Lync with telephony and Video for 500 User? How i can integrate Mediagateway for PSTN and Analog Phones

Bhavik.

your question requires extensive discussion. i suggest you refer to Technet and Lync 2013 CHM help file as main information source, then you can integrate with countless other publicly available sources on the internet.

Hi,

1. You can refer to Lync Server User Models to plan your Lync Server

http://technet.microsoft.com/en-us/library/gg398811.aspx

You can also use Lync Planning tool and type 500 in box with the number of users.  The planning tool will then use your answers to recommend a topology based on the tested Microsoft Lync Server user model.

http://www.microsoft.com/en-us/download/details.aspx?id=19711

2. There are two choices for PSTN connectivity:

SIP Trunking

Direct SIP Connections

For details about PSTN connectivity:

http://technet.microsoft.com/en-us/library/gg425749.aspx

Another link for deploying analog devices in Lync environment:

http://technet.microsoft.com/en-us/library/gg398314(v=ocs.14).aspx